After having integrated ENS (Ecole Normale Supérieure de Cachan) school and completing the "agregation" in mechanical engineering, I have been granted a MSc in biomaterials at Paris 13 University. Subsequently, I continued my studies by completing a PhD at Sorbonne Paris Nord University, where I defended a thesis focused on the impact of CAD/CAM machining on the surface integrity of coronal dental prostheses. I gained valuable teaching experience at Sorbonne Paris Nord University, while conducting in-depth research on the surface integrity of biomaterials at Paris Cité University. My research makes it possible to understand the impact of part shaping processes on material properties. The objective is to improve the lifespan of the produced parts.
Max Troizier Cheyne; Nicolas Lebon; Floriane Laverne
Impact of Intraoral Scanner Sleeves on STL File Accuracy: A Metrological Approach Journal Article
In: Computer-Aided Design and Applications (CAD&A), vol. 21, no. 4, pp. 567-580, 2023.
@article{troizier_cheyne_2485,
title = {Impact of Intraoral Scanner Sleeves on STL File Accuracy: A Metrological Approach},
author = {Max Troizier Cheyne and Nicolas Lebon and Floriane Laverne},
url = {https://www.cad-journal.net/files/vol_21/CAD_21(4)_2024_567-580.pdf},
year = {2023},
date = {2023-11-01},
journal = {Computer-Aided Design and Applications (CAD&A)},
volume = {21},
number = {4},
pages = {567-580},
abstract = {Intraoral scanners (IOS) are essential tools in dental prosthodontics, enabling efficient digitization of dental arches for CAD-CAM workflows. The Primescan IOS (Dentsply Sirona) can be fitted with three scanning sleeves, based on the level of hygiene imposed by the clinical situation and health regulations: a standard sleeve (SS), an autoclavable sleeve (AS), and a disposable sleeve (DS). Most studies evaluating accuracy use local best-fit algorithms to superimpose a reference scan and a test scan, providing relative accuracy. This study proposes an alternative evaluation method based on metrological principles and aims to compare the quality of scans taken with the three types of sleeves. An 8 mm aluminum oxide sphere was scanned 24 times using each sleeve. Mesh analysis was conducted, and measures of trueness, precision, and digitizing noise were calculated. Significant differences in trueness were identified between AS-DS (p < 0.001) as well as AS-SS (p < 0.001), while no significant differences were found between the sleeves for precision (p = 0.623). Significant differences in digitizing noise were also identified between DS-AS (p < 0.001), DS-SS (p = 0.001), and SS-AS (p = 0.001). This study tested the scanning quality of an IOS fitted with different sleeves using absolute measures as opposed to relative measures, and though statistically significant differences were found, within the experimental conditions, the errors appear to be within clinically accepted limits.},
keywords = {},
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}
Lucien Dupagne; Bernardin Mawussi; Laurent Tapie; Nicolas Lebon
In: Heliyon, vol. 9, no. 2, pp. e13235, 2023.
@article{dupagne_2511,
title = {Comparison of the measurement error of optical impressions obtained with four intraoral and one extra-oral dental scanners of post and core preparations},
author = {Lucien Dupagne and Bernardin Mawussi and Laurent Tapie and Nicolas Lebon},
url = {https://www.sciencedirect.com/science/article/pii/S2405844023004425?via%3Dihub},
year = {2023},
date = {2023-02-01},
journal = {Heliyon},
volume = {9},
number = {2},
pages = {e13235},
abstract = {Statement of problem: Innovations in intraoral scanner (IOS) technology are opening up ever more indications for computer-aided design and manufacturing (CAD-CAM). The manufacturers claim that the latest generations of scanners allow the digitizing of root canal preparations. However, there is a lack of studies evaluating the quality of the optical impressions made for this type of treatment. Purpose: The purpose of this study was to evaluate the measurement error of 4 IOSs and a laboratory scanner used for the digitizing of root canal preparations and to highlight the effect of the presence or absence of adjacent teeth on the quality of the digital model. Material and methods: Two models: one presenting adjacent teeth, one without adjacent teeth, both presenting a 10 mm deep nominal conical pit mimicking a root canal preparation were fabricated. Each model was scanned 10 times with a laboratory scanner (E3) and 4 intraoral scanners (Primescan, Omnicam, TRIOS 4, and Medit i700). The digital models were then exported as standard tessellation language (STL) files and analyzed to evaluate the mean measurement error of the digitizing of the root preparation at three different depths: 0-3 mm, 3-6 mm, and 6-9 mm. Significant differences were assessed with a 1-way ANOVA test and the pairwise comparison between scanners was done by Tukey's multiple comparison test.
Results: Statistical differences were found between scanners (P < 0.05). The mean measurement error ranged from 9.8 ± 0.5 ?m with the Medit i700 to 28.2 ± 10 ?m with the E3. The E3 and Omnicam scanners were in some cases incapable of digitizing the conical preparation in its entirety. The group Primescan, TRIOS 4, and Medit i700 showed minimally significant differences. The presence of adjacent teeth had a negative effect on the model quality for some scanners, mainly because of the obstruction of the IOS's head. Conclusions: Significant differences were found among the dental scanners used for digitizing root canal preparations. Optical impressions with modern intraoral scanners seem to be an adapted},
keywords = {},
pubstate = {published},
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}
Lucien Dupagne; Laurent Tapie; Nicolas Lebon; Bernardin Mawussi
Comparison of the acquisition accuracy and digitizing noise of 9 intraoral and extraoral scanners: An objective method Journal Article
In: Journal Of Prosthetic Dentistry, vol. 128, no. 5, pp. 1032-1040, 2022.
@article{dupagne_2512,
title = {Comparison of the acquisition accuracy and digitizing noise of 9 intraoral and extraoral scanners: An objective method},
author = {Lucien Dupagne and Laurent Tapie and Nicolas Lebon and Bernardin Mawussi},
url = {https://www.sciencedirect.com/science/article/pii/S0022391321000767},
year = {2022},
date = {2022-11-01},
journal = {Journal Of Prosthetic Dentistry},
volume = {128},
number = {5},
pages = {1032-1040},
abstract = {Statement of problem. The quality of the digital cast obtained from an intraoral scanner is an
important comparison parameter for computer-aided design and computer-aided manufacturing
(CAD-CAM) restorations. However, data on cast quality are typically provided by manufacturers,
and objective evaluation of these devices is lacking. Purpose. The purpose of this in vitro study was to build an evaluation protocol of 8 intraoral scanners by using an objective method for a small-scale model equivalent in size to a 4-tooth wide cast. In addition, a laboratory scanner was included to compare the performance of intraoral and extraoral devices.
Material and methods. An 8-mm-thick zirconia gauge block was scanned 10 times with a
laboratory scanner (Iscan D104) and 8 intraoral scanners (Omnicam, Primescan, Itero element 5D, CS 3600, TRIOS 3, Emerald, Planscan, and Medit i500). The obtained digital casts were extracted as standard tessellation language (STL) files and analyzed to evaluate the digitizing noise, dimensional trueness, and dimensional precision of each scanner. After validation of the normal distribution of the digitizing noise, dimensional trueness, and precision test results for each scanner with the Shapiro-Wilk test (a=.05), differences were determined with a 1-way ANOVA test. Results. Statistical differences were found between scanners (P<.05). The digitizing noise ranged from 3.2 ±0.6 mm with the Primescan to 15.5 ±2.5 mm with the Planscan. The dimensional trueness ranged from 19.1 ±11.5 mm for the CS3600 to 243.8 ±33.6 mm for the Planscan. The dimensional precision ranged from 7.7 ±2.4 mm for the Primescan to 53.7 ±3.4 mm for the Emerald. The group Iscan D104, Primescan, Itero 5D, CS3600, and TRIOS 3 showed minimally significant differences. Conclusions. Significant differences were found among the intraoral scanners for small-scale scans. The objective methodology of using a gauge block provided coherent and repeatable results.},
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}
Norman Chiche; William Pacquet; Nicolas Lebon; Elsa Vennat; Laurent Tapie
Inspecting CAD/CAM ceramic dental prosthesis using X-ray micro-computed tomography Journal Article
In: Computer Methods in Biomechanics and Biomedical Engineering: Imaging and Visualization, vol. 11, no. 3, pp. 554-567, 2022.
@article{chiche_2508,
title = {Inspecting CAD/CAM ceramic dental prosthesis using X-ray micro-computed tomography},
author = {Norman Chiche and William Pacquet and Nicolas Lebon and Elsa Vennat and Laurent Tapie},
url = {https://www.tandfonline.com/action/showCitFormats?doi=10.1080/21681163.2022.2092033},
year = {2022},
date = {2022-06-01},
journal = {Computer Methods in Biomechanics and Biomedical Engineering: Imaging and Visualization},
volume = {11},
number = {3},
pages = {554-567},
abstract = {The X-ray micro-computed tomography measurement protocol proposed in this paper aims to inspect the geometrical quality of ceramic dental prostheses manufactured by dental CAD/CAM systems. This measurement protocol sits at the interface of dental CAD/CAM technology and dental CAD/CAM engineering, which will interest to the dentistry community. The main objective of this paper is to provide a turnkey solution to researchers with a medical-education background for 3D inspection of dental prostheses. The proposed protocol hinges on 3D digitisation, obtained by X-ray micro-computed tomography acquisition and image processing. Before using it in a realistic case, the protocol has been validated by inspecting a certified ceramic sphere. The measurements demonstrated errors under the level of clinical tolerance. A realistic prosthesis was then designed and machined. Our protocol revealed under-milled areas, over-milled areas, and, particularly, chipping on thinnest areas. This protocol is crucial for overcoming the inherent difficulties in exchanging information between dentistry practice and dental CAD/CAM systems development.},
keywords = {},
pubstate = {published},
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}
Marie-Joséphine Crenn; Pierre Dubot; Elie Mimran; Olivier Fromentin; Nicolas Lebon; Patrice Peyre
Influence of Anodized Titanium Surfaces on the Behavior of Gingival Cells in Contact with: A Systematic Review of In Vitro Studies Journal Article
In: Crystals, vol. 12, no. 7, pp. 1566-1589, 2021.
@article{crenn_2509,
title = {Influence of Anodized Titanium Surfaces on the Behavior of Gingival Cells in Contact with: A Systematic Review of In Vitro Studies},
author = {Marie-Joséphine Crenn and Pierre Dubot and Elie Mimran and Olivier Fromentin and Nicolas Lebon and Patrice Peyre},
url = {https://www.mdpi.com/2073-4352/11/12/1566},
year = {2021},
date = {2021-12-01},
journal = {Crystals},
volume = {12},
number = {7},
pages = {1566-1589},
abstract = {Electrochemically anodized (EA) surfaces promise enhanced biological properties and may
be a solution to ensure a seal between peri-implant soft tissues and dental transmucosal components. However, the interaction between the modified nano-structured surface and the gingival cells needs further investigation. The aim of this systematic review is to analyze the biological response of gingival cells to EA titanium surfaces in in vitro studies with a score-based reliability assessment. A protocol aimed at answering the following focused question was developed: ?How does the surface integrity (e.g., topography and chemistry) of EA titanium influence gingival cell response in in vitro studies??. A search in three computer databases was performed using keywords. A quality
assessment of the studies selected was performed using the SciRAP method. A total of 14 articles were selected from the 216 eligible papers. The mean reporting and the mean methodologic quality SciRAP scores were 87.7 +- 7.7/100 and 77.8 +- 7.8/100, respectively. Within the limitation of this review based on in vitro studies, it can be safely speculated that EA surfaces with optimal chemical and morphological characteristics enhance gingival fibroblast response compared to conventional titanium surfaces. When EA is combined with functionalization, it also positively influences gingival epithelial cell behavior.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Nicolas Lebon; Laurent Tapie
Milled Surface Integrity: Application to Fixed Dental Prosthesis Journal Article
In: Crystals, vol. 11, no. 5, pp. 559-573, 2021.
@article{lebon_2493,
title = {Milled Surface Integrity: Application to Fixed Dental Prosthesis},
author = {Nicolas Lebon and Laurent Tapie},
url = {https://www.mdpi.com/2073-4352/11/5/559},
year = {2021},
date = {2021-05-01},
journal = {Crystals},
volume = {11},
number = {5},
pages = {559-573},
abstract = {Surface integrity is a multiphysics (biological, mechanical, optical, chemical, esthetic, etc.)
and multiscale (from nm to mm) concept. It is defined as the residual signature left on the surface by the manufacturing or post-treatment process and permits correlating the process with the expected surface functionalities. Thanks to the advances made in mechanical engineering, the concept of surface integrity has been transposed to dentistry and oral science. The surface integrity concept transposed to fixed dental prostheses is presented in this article. The main components of surface integrity and their correlations within the triptych of surface integrity-process-clinical functionalities are presented.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Nicolas Lebon; Laurent Tapie; Elsa Vennat
Influence of Milling Tool and Prosthetic Materials on Roughness of the Dental CAD CAM Prostheses in End Milling Mode Journal Article
In: Applied Sciences-Basel, vol. 10, no. 7, pp. 2238-2252, 2020.
@article{lebon_2853,
title = {Influence of Milling Tool and Prosthetic Materials on Roughness of the Dental CAD CAM Prostheses in End Milling Mode},
author = {Nicolas Lebon and Laurent Tapie and Elsa Vennat},
url = {https://www.mdpi.com/2076-3417/10/7/2238},
year = {2020},
date = {2020-03-01},
journal = {Applied Sciences-Basel},
volume = {10},
number = {7},
pages = {2238-2252},
abstract = {Dental prostheses are machined by computer-aided design and manufacturing (CAD/CAM) tools. The integrity of the surface obtained, which must be suitable to meet expected clinical requirements is influenced by the milling parameters programmed. The integrity of the occlusal prosthesis surface obtained by the end milling mode, that is milling with a diamond rotary cutting tip, plays a major role in the clinical requirements desired. This study aims to investigate the impact of the tool-biomaterial couple in the CAD/CAM end milling mode on surface integrity (through roughness). Two CAD/CAM tools and four CAD/CAM biomaterials, both combined to four feed rates are tested. The surface roughness (Ra, Rt, Rz, Sa, Sq, and Sz) is observed for each couple. Finally, pairwise comparisons (Kruskal-Wallis test) of tool-biomaterial couples are performed. The results indicate that all the machined surfaces reveal isotropic surface topology. The roughness depends on the hardness of the biomaterial and not on the feed rate. The statistical tests reveal a significant difference in roughness depending on the tool used. To conclude, when milling the functional occlusal shape, biomaterial hardness and the tool used are key factors for achieving a given roughness consistent with clinical requirements.},
keywords = {},
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Nicolas Lebon; Laurent Tapie; Elsa Vennat; Bernardin Mawussi
A Computer-Aided Tool to Predict Dental Crown Prosthesis Surface Integrity after Milling Journal Article
In: Computer-Aided Design and Applications (CAD&A), vol. 16, no. 5, pp. 894-903, 2019.
@article{lebon_2520,
title = {A Computer-Aided Tool to Predict Dental Crown Prosthesis Surface Integrity after Milling},
author = {Nicolas Lebon and Laurent Tapie and Elsa Vennat and Bernardin Mawussi},
url = {https://cad-journal.net/files/vol_16/Vol16No5.html},
year = {2019},
date = {2019-01-01},
journal = {Computer-Aided Design and Applications (CAD&A)},
volume = {16},
number = {5},
pages = {894-903},
abstract = {The roughness of dental prostheses surfaces, manufactured by CAD/CAM, is one of the major components of surface integrity (SI) to insure clinical success. This article aims at evaluating and quantifying the influence of the milling process characteristics on the roughness. First, the experimental results emphasize an influence of the tool grit size, the tool/prosthesis inclination and the biomaterials used on roughness. Then, based on these results, the definition of performance indicators for multi-physical and multi-indicator SI evaluation are proposed and implemented on a computer-aided tool to predict roughness. The use of this tool might help to proceed a topological decomposition of the crown to better respect the prosthetic specifications and to provide valuable assistance to the practitioner or the laboratory technician.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Nicolas Lebon; Laurent Tapie; Francois Duret; Jean-Pierre Attal
Understanding dental CAD/CAM for restorations - dental milling machines from a mechanical engineering viewpoint Part B: Labside milling machines Journal Article
In: International Journal Of Computerized Dentistry, vol. 19, no. 2, pp. 115-134, 2016.
@article{lebon_2852,
title = {Understanding dental CAD/CAM for restorations - dental milling machines from a mechanical engineering viewpoint Part B: Labside milling machines},
author = {Nicolas Lebon and Laurent Tapie and Francois Duret and Jean-Pierre Attal},
url = {https://pubmed.ncbi.nlm.nih.gov/27274561/},
year = {2016},
date = {2016-06-01},
journal = {International Journal Of Computerized Dentistry},
volume = {19},
number = {2},
pages = {115-134},
abstract = {Nowadays, dental numerical controlled (NC) milling machines are available for dental laboratories (labside solution) and dental production centers. This article provides a mechanical engineering approach to NC milling machines to help dental technicians understand the involvement of technology in digital dentistry practice. The technical and economic criteria are described for four labside and two production center dental NC milling machines available on the market. The technical criteria are focused on the capacities of the embedded technologies of milling machines to mill prosthetic materials and various restoration shapes. The economic criteria are focused on investment cost and interoperability with third-party software. The clinical relevance of the technology is discussed through the accuracy and integrity of the restoration. It can be asserted that dental production center milling machines offer a wider range of materials and types of restoration shapes than labside solutions, while labside solutions offer a wider range than chairside solutions. The accuracy and integrity of restorations may be improved as a function of the embedded technologies provided. However, the more complex the technical solutions available, the more skilled the user must be. Investment cost and interoperability with third-party software increase according to the quality of the embedded technologies implemented. Each private dental practice may decide which fabrication option to use depending on the scope of the practice.},
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Nicolas Lebon; Laurent Tapie; Francois Duret; Jean-Pierre Attal
In: International Journal Of Computerized Dentistry, vol. 19, no. 1, pp. 45-62, 2016.
@article{lebon_2497,
title = {Understanding dental CAD/CAM for restorations - dental milling machines from a mechanical engineering viewpoint. Part A: chairside milling machines},
author = {Nicolas Lebon and Laurent Tapie and Francois Duret and Jean-Pierre Attal},
url = {http://www.quintpub.com/journals/jcd/abstract.php?article_id=16182},
year = {2016},
date = {2016-03-01},
journal = {International Journal Of Computerized Dentistry},
volume = {19},
number = {1},
pages = {45-62},
abstract = {The dental milling machine is an important device in the dental CAD/CAM chain. Nowadays, dental numerical controlled (NC) milling machines are available for dental surgeries (chairside solution). This article provides a mechanical engineering approach to NC milling machines to help dentists understand the involvement of technology in digital dentistry practice. First, some technical concepts and definitions associated with NC milling machines are described from a mechanical engineering viewpoint. The technical and economic criteria of four chairside dental NC milling machines that are available on the market are then described. The technical criteria are focused on the capacities of the embedded technologies of these milling machines to mill both prosthetic materials and types of shape restorations. The economic criteria are focused on investment costs and interoperability with third-party software. The clinical relevance of the technology is assessed in terms of the accuracy and integrity of the restoration.},
keywords = {},
pubstate = {published},
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}
Laurent Tapie; Nicolas Lebon; Bernardin Mawussi; Helene Fron-Chapuis; Francois Duret; Jean-Pierre Attal
Understanding dental CAD/CAM for restorations-accuracy from a mechanical engineering viewpoint Journal Article
In: International Journal Of Computerized Dentistry, vol. 18, no. 4, pp. 343-367, 2015.
@article{tapie_2515,
title = {Understanding dental CAD/CAM for restorations-accuracy from a mechanical engineering viewpoint},
author = {Laurent Tapie and Nicolas Lebon and Bernardin Mawussi and Helene Fron-Chapuis and Francois Duret and Jean-Pierre Attal},
url = {https://www.quintessence-publishing.com/deu/en/article/833589},
year = {2015},
date = {2015-12-01},
journal = {International Journal Of Computerized Dentistry},
volume = {18},
number = {4},
pages = {343-367},
abstract = {As is the case in the field of medicine, as well as in most areas of daily life, digital technology is increasingly being introduced into dental practice. Computer-aided design/ computer-aided manufacturing (CAD/CAM) solutions are available not only for chairside practice but also for creating inlays, crowns, fixed partial dentures (FPDs), implant abutments, and other dental prostheses. CAD/CAM dental practice can be considered as the handling of devices and software processing for the almost automatic design and creation of dental restorations. However, dentists who want to use dental CAD/CAM systems often do not have enough information to understand the variations offered by such technology practice. Knowledge of the random and systematic errors in accuracy with CAD/CAM systems can help to achieve successful restorations with this technology, and help with the purchasing of a CAD/CAM system that meets the clinical needs of restoration. This article provides a mechanical engineering viewpoint of the accuracy of CAD/ CAM systems, to help dentists understand the impact of this technology on restoration accuracy.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Nicolas Lebon; Laurent Tapie; Elsa Vennat; Bernardin Mawussi
Influence of CAD/CAM tool and material on tool wear and roughness of dental prostheses after milling Journal Article
In: Journal Of Prosthetic Dentistry, vol. 114, no. 2, pp. 236-247, 2015.
@article{lebon_2496,
title = {Influence of CAD/CAM tool and material on tool wear and roughness of dental prostheses after milling},
author = {Nicolas Lebon and Laurent Tapie and Elsa Vennat and Bernardin Mawussi},
url = {https://www.thejpd.org/article/S0022-3913(15)00093-1/fulltext},
year = {2015},
date = {2015-05-01},
journal = {Journal Of Prosthetic Dentistry},
volume = {114},
number = {2},
pages = {236-247},
abstract = {Statement of problem. Computer-aided design/computer-aided manufacturing (CAD/CAM) machining influences the surface roughness of dental restorations and tool wear. Roughness must be suitable to meet clinical requirements, and the tool must last as long as possible. Purpose. The purpose of this pilot study was to investigate the influence of the CAD/CAM toolmaterial couple on tool wear and surface roughness after milling. Material and methods. Three tools (Lyra conical tool Ø1 mm; GACD SASU, Lyra conical tool Ø1.05 mm; GACD SASU, and Cerec cylinder pointed tool 12S; Sirona Dental Systems GmbH) and 3 CAD/CAM materials (Lava Ultimate; 3M ESPE, Mark II; VITA Zahnfabrik H. Rauter GmbH, and Enamic; VITA Zahnfabrik H. Rauter GmbH) were tested. The tool wear of 6 tool-material couples at a feed rate of 2 m/min was analyzed before and after 8 minutes of flank and climb milling with optical and scanning electron microscopy (SEM) observations and tool weighing. The surface roughness after milling was observed for 9 tool-material couples for flank and climb milling. Feed rates of 1, 2, 3, and 4.8 m/min were used for each couple. Ra, Rt, Rz, Sa, Sq, and Sz roughness criteria were measured. A paired comparison of tool-material couples was conducted with the Kruskal-Wallis test. Results. The Mark II material led to more severe tool wear. Milling of Lava Ultimate resulted in chip deposits on the tool grit. The Cerec cylinder pointed tool 12S was less worn for each material tested. The Cerec cylinder pointed tool 12S and the Lyra conical tool Ø1.05 mm provided similar roughness measurements for the 3 materials tested. The Lyra conical tool Ø1.05 mm tool provided better roughness than the Lyra conical tool Ø1 mm tool for the Enamic material. Conclusion. Tool lifetime calculated by volume of milled material removed should be the measure
provided by CAD/CAM manufacturers instead of a number of blocks. This tool lifetime should be
provided for the milling conditions associated with the material milled. Material hardness and tool grit are key factors for achieving a given roughness.},
keywords = {},
pubstate = {published},
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}
Laurent Tapie; Nicolas Lebon; Bernardin Mawussi; Helene Fron-Chabouis; Francois Duret; Jean-Pierre Attal
Understanding dental CAD/CAM for restorations - the digital workflow from a mechanical engineering viewpoint Journal Article
In: International Journal Of Computerized Dentistry, vol. 18, no. 1, pp. 21-24, 2015.
@article{tapie_2514,
title = {Understanding dental CAD/CAM for restorations - the digital workflow from a mechanical engineering viewpoint},
author = {Laurent Tapie and Nicolas Lebon and Bernardin Mawussi and Helene Fron-Chabouis and Francois Duret and Jean-Pierre Attal},
url = {https://www.quintessence-publishing.com/deu/en/article/833569},
year = {2015},
date = {2015-03-01},
journal = {International Journal Of Computerized Dentistry},
volume = {18},
number = {1},
pages = {21-24},
abstract = {As digital technology infiltrates every area of daily life, including the field of medicine, so it is increasingly being introduced into dental practice. Apart from chairside practice, computer-aided design/computer-aided manufacturing (CAD/CAM) solutions are available for creating inlays, crowns, fixed partial dentures (FPDs), implant abutments, and other dental prostheses. CAD/CAM dental solutions can be considered a chain of digital devices and software for the almost automatic design and creation of dental restorations. However, dentists who want to use the technology often do not have the time or knowledge to understand it. A basic knowledge of the CAD/CAM digital workflow for dental restorations can help dentists to grasp the technology and purchase a CAM/CAM system that meets the needs of their office. This article provides a computer-science and mechanical-engineering approach to the CAD/CAM digital workflow to help dentists understand the technology.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Nicolas Lebon; Laurent Tapie
Special Issue: Biomaterials Surface Integrity Book
MDPI, Crystals, 2022, ISBN: ISSN 2073-4352.
@book{lebon_2522,
title = {Special Issue: Biomaterials Surface Integrity},
author = {Nicolas Lebon and Laurent Tapie},
url = {https://www.mdpi.com/journal/crystals/special_issues/Biomaterials_surface_integrity},
issn = {ISSN 2073-4352},
year = {2022},
date = {2022-03-01},
volume = {12},
pages = {62},
publisher = {Crystals},
edition = {MDPI},
abstract = {Nowadays, prostheses or implantable medical devices intended for biomedical use are manufactured using various processes, such as machining, 3D printing, molding, and forging. These manufacturing processes generate a characteristic ?imprint? on the prosthesis
shape called surface integrity. Regarding the functional requirements of prostheses or implantable medical devices, the concept of surface integrity represents a new and preferential approach to characterizing the surface and sub-surface properties of biomaterials. Surface integrity analysis provides a comprehensive evaluation of the surface and its impact on the prosthesis' performance. However, the integrity of the surface, which must be suitable to meet expected clinical requirements (mechanical properties, optical properties, thermal properties, electrical properties, chemical properties), is influenced by the manufacturing process parameters used. To assess surface integrity, many characterization techniques are available depending on the observation scales; these include, but are not limited to, spectroscopy, optical imaging methods, nanoindentation, magnetic property measurements, roughness measurements, and X-Ray inspection. Surface integrity is a fundamental concept in engineering due to the invaluable source of information it provides about surface characteristics and its ability to meet clinical functional specifications.},
note = {Editorial : https://doi.org/10.3390/cryst12040438},
keywords = {},
pubstate = {published},
tppubtype = {book}
}
Iris KERGOZIEN; Nicolas Lebon
Innovative Methods for Aligning and Comparing Dental Scans Conference
2ème Journée de la Recherche en Odontologie, Université Paris Cité Montrouge, France, 2024.
@conference{kergozien_3070,
title = {Innovative Methods for Aligning and Comparing Dental Scans},
author = {Iris KERGOZIEN and Nicolas Lebon},
url = {https://u-paris.fr/odontologie/journee-de-la-recherche/},
year = {2024},
date = {2024-07-01},
booktitle = {2ème Journée de la Recherche en Odontologie},
address = {Montrouge, France},
organization = {Université Paris Cité},
abstract = {CAD/CAM technologies have driven substantial progress in dentistry, replacing traditional plaster by a digital chain mainly using STL files. The first step in this chain is the digitization made by IOS, which allows a transition from the real world to a digital model.
Initially, the STL files issued of the IOS's intended as a support to design the prostheses. They also have proven valuable for comparing geometric and dimensional differences between two files, aiming determining the quality of IOS's or/and also between different dental protocols.
Following a bibliographic study of the scientific literature, two main methods of comparing by superimposing STL files emerge: 1) the use of a best-fit algorithm and 2) adding physical geometric elements (landmarks), such as spheres, cylinders and cones, on the dentition to be scanned.
On one hand, best fit algorithm relies on the scanned surface range. When applied to full-arch models with additional surfaces like part of palate, gum, it results in a loss of precision. Also, it is necessary to take into account the biases of the variability of the scanned surfaces, the complexity of the geometry, and its sensitivity to digitization errors. However, it's a simple and readily applicable method. For instance, it enables to create colored maps illustrating differences between the files, determine minimum and maximum recorded values, and compute the standard deviation.
On the other hand, using geometric landmarks allows us to measure deviations, linear distances, spatial distortion and cross distances, between particular points of the landmarks (centers of spheres, head of cones, cylinders axis). Finally, overall or local trueness computation is possible. This method ranging from measuring arch opening to torsion allows great precision and repeatability, but is very difficult to implement in vivo.
My research works focuses on introducing an effective protocol solution. This involves proposing a hybrid post-processing method to integrate virtual reference geometries directly onto scans. Ultimately, this method aims to achieve the same results as landmark-based approaches, either without explicit landmarks or through a combination of localized best fit and geometric landmarks.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Rebecca ALLPORT; Nicolas Lebon; Swaminath Venkateswaran; Floriane Laverne
Benefits of intraoral cobotic scanning in the dental CAD/CAM chain Conference
2ème Journée de Recherche en Odontologie, Université Paris Cité Montrouge, France, 2024.
@conference{allport_3099,
title = {Benefits of intraoral cobotic scanning in the dental CAD/CAM chain},
author = {Rebecca ALLPORT and Nicolas Lebon and Swaminath Venkateswaran and Floriane Laverne},
url = {https://u-paris.fr/odontologie/journee-de-la-recherche/},
year = {2024},
date = {2024-07-01},
booktitle = {2ème Journée de Recherche en Odontologie},
address = {Montrouge, France},
organization = {Université Paris Cité},
abstract = {Dental CAD/CAM has been modernised in the last years thanks to digital intraoral scanners (IOS) and additive manufacturing machines, which are increasingly used in the dentistery. Stl files obtained with IOS are the first step for the digital manufacture of dental prostheses. Their quality, characterized with precision and accuracy are the key terms to guarantee efficiency in patient care. However, several parameters influence them, such as the environment (temperature, brightness, etc.), the practitioner (level of expertise, fatigue, handling the scanner, etc.), the patient (tongue, head, saliva, complex shapes, etc.) and the scanner (speed, rate, resolution, starting point, trajectory, tip, etc.).
In the medical sector, the use of robotics is getting more common to improve precision in surgery for example. In this project, a cobot i.e. a collaborative robot (UR5e from HMI-MBS), combined with the Care Stream CS3800 IOS, one of the most interesting scanners on the market are used to ensure repeatability of the experiments and to quantify the impact of the environmental factors. Then results are compared in a same protocol with files obtained manually by a practionner.
In the study, we assume that we are working on the restoration of a molar for an adult with standard dentition using a sphere (canonical form) whose material and diameter are similar in size to an adult molar. Given the complex shapes of the tooth and multiple parameters involved, initial assumptions are made. Indeed, we assume we are working in a dentist's surgery environment and using only the wireless side with its standard tip for the scanner.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Timothy FASHAM; Philippe FRANCOIS; Nicolas Lebon; Floriane Laverne
Optimisation strategies of different VAT photopolymerization printers Conference
2ème Journée de la Recherche en Odontologie, Université Paris Cité Montrouge, France, 2024.
@conference{fasham_3095,
title = {Optimisation strategies of different VAT photopolymerization printers},
author = {Timothy FASHAM and Philippe FRANCOIS and Nicolas Lebon and Floriane Laverne},
url = {https://u-paris.fr/odontologie/journee-de-la-recherche/},
year = {2024},
date = {2024-07-01},
booktitle = {2ème Journée de la Recherche en Odontologie},
address = {Montrouge, France},
organization = {Université Paris Cité},
abstract = {Objective: This study aims to assess the accuracy of dental arch models printed with different vat photopolymerization technologies SLA (stereolithography), DLP (digital light processing) and LCD (liquid crystal display) while considering different resin types and layer thicknesses.
Materials and methods: Based on a STL file of a dental arch, 80 models were printed flat on the build plate using the specific resins from a SLA printer (Draft V2 (DR) and Grey V4 (GR) resin on Form 3+ Auto, Formlabs), a DLP printer (printed with different resin (Die and model 2 (DM) on Pro95S, SprintRay), a LCD printer (Aqua-Gray (AG) on Sonic Mini 8Ks, Phrozen) and according to the different layer thicknesses recommended by the manufacturer for each resin. The production time (printing and post-processing) of 10 models printed with the same resin and layer thickness was recorded. The STL files of the printed models were obtained after scanning with the highest precision program of a desktop scanner. A same mesh processing of the 80 STL files and the initial STL file was performed for better comparison. Accuracy was assessed as the area of valid distance between the STL of a printed model and the initial STL file following a best fit comparison with a 3D analysis software (Zeiss Inspect).
Results: The production time was the fastest with the DLP printers. Only the resin DR200 (Draft V2 resin printed with a layer thickness of 200?m) had an equivalent production time as DM100 (Die and model resin printed with a layer thickness of 100?m). Accuracy amongst the different printed models for a specific resin and a given thickness layer significantly increases according to the following sequence: AG50 < DM50 < DM170 < DM100 = DR100 = DR200 = GR100 < GR50.
Conclusion: A SLA printer has the best accuracy over the DLP and LCD. It's possible that hardware of the vat photopolymerization technologies may explain the differences in accuracy.
Clinical relevance: Within a dental laboratory seeking to optimise both accuracy and efficiency, mass printing of models with a layer thickness of 200?m on an automated SLA printer can be recommended.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Max Troizier-Cheyne; Nicolas Lebon; Floriane Laverne
IMPACT OF INTRAORAL SCANNER SLEEVES ON STL FILE ACCURACY: A METROLOGICAL APPROACH Conference
1ère Journée de Recherche en Odontologie, Université Paris Cité Montrouge, France, 2023.
@conference{troizier-cheyne_3135,
title = {IMPACT OF INTRAORAL SCANNER SLEEVES ON STL FILE ACCURACY: A METROLOGICAL APPROACH},
author = {Max Troizier-Cheyne and Nicolas Lebon and Floriane Laverne},
url = {https://u-paris.fr/odontologie/%C3%A9v%C3%A8nement/journee-recherche/},
year = {2023},
date = {2023-07-01},
booktitle = {1ère Journée de Recherche en Odontologie},
address = {Montrouge, France},
organization = {Université Paris Cité},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Adrien Mourgout; Amine Hattal; Juliette Gandolfi; Azziz Hocini; Bernardin Mawussi; Nicolas Lebon; Rémy Pirès; Loic Perriere; Guy Dirras
Laser Powder Bed Fusion Processing Of Complex Concentrated Alloys For Bio-Implants Conference
Powder Metallurgy World Congress 2022, European Powder Metallurgy Association (EPMA) Lyon, France, 2022.
@conference{mourgout_2490,
title = {Laser Powder Bed Fusion Processing Of Complex Concentrated Alloys For Bio-Implants},
author = {Adrien Mourgout and Amine Hattal and Juliette Gandolfi and Azziz Hocini and Bernardin Mawussi and Nicolas Lebon and Rémy Pirès and Loic Perriere and Guy Dirras},
url = {https://www.worldpm2022.com/},
year = {2022},
date = {2022-12-01},
booktitle = {Powder Metallurgy World Congress 2022},
pages = {1-8},
address = {Lyon, France},
organization = {European Powder Metallurgy Association (EPMA)},
abstract = {As the population ages in modern societies and the risks of bone diseases or bone accidents increase, there is a need for a new generation of materials with superior biocompatibility and good mechanical properties. This study combines two innovative metallurgical concepts to provide a material solution for the intended application. To this end, multicomponent and complex concentrated alloy (HEA/CCAs) based on TiNbZr-X (X = Mo, Ta) system is fabricated via additive manufacturing (AM), namely by Laser-Powder Bed Fusion (L-PBF) of gas-atomized pre-alloyed powder. After each stage of development by L-PBF through Taguchi's design of experiments, complete microstructure characterization and mechanical behavior of the resulting samples under different loading conditions are conducted. In addition, mechanical surface functionalization carried out by machining with metrological monitoring as a pre-step before a chemical functionalization for the suitability of materials developed for the intended application.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Nicolas Lebon; Laurent Tapie; William Pacquet
Usinabilité des biomatériaux dentaires pour prothèses conjointes Conference
Manufacturing 21, Art et Métiers Angers, France, 2021.
@conference{lebon_2523,
title = {Usinabilité des biomatériaux dentaires pour prothèses conjointes},
author = {Nicolas Lebon and Laurent Tapie and William Pacquet},
url = {https://confmanuf21.sciencesconf.org/},
year = {2021},
date = {2021-06-01},
booktitle = {Manufacturing 21},
pages = {1-14},
address = {Angers, France},
organization = {Art et Métiers},
abstract = {Grâce à la démocratisation de la CFAO dentaire, les dentistes et prothésistes dentaires sont en mesure de produire des prothèses usinées. Les chaînes numériques proposées sont commercialisées pour être exploitables par des professionnels de santé ayant peu de notion des interactions Outil-Machine-Matière. Ainsi, les industriels de la CFAO dentaire fournissent des packages FAO-MOCN pré-intégrés où les stratégies d'usinage, les outils d'abrasion et les cinématiques machine sont imposés. Les biomatériaux à mettre en forme dans le cadre de la réalisation de prothèses dentaires couvrent de nombreuses familles allant des polymères, des composites aux céramiques selon le cas clinique à traiter. Pourtant les stratégies d'usinage, les outils et les conditions de coupe proposés diffèrent très peu d'un matériau à l'autre. D'un point de vue clinique, les praticiens observent de grandes variations sur l'intégrité de surface des prothèses réalisées notamment en terme de rugosité ou encore d'écaillage de bords fins. La rugosité est un critère important influençant les propriétés de collage, esthétiques ou encore de développement de la plaque bactérienne. L'écaillage souvent constaté en limite marginale, zone assurant l'étanchéité entre la prothèse et les tissus dentaires à restaurer et à préserver, pose quant à lui des problèmes de tenue mécanique ou de reprise de pathologie carieuse. Les résultats expérimentaux ont permis de dégager des premières pistes d'amélioration des stratégies d'usinage à mettre en oeuvre pour les prothèses dentaires.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Nicolas Lebon; Laurent Tapie; Elsa Vennat
PERFORMANCE INDICATORS FOR PROSTHESIS SURFACE INTEGRITY AFTER DENTAL CAD/CAM MILLING Conference
16th International Symposium on Computer Methods in Biomechanics and Biomedical Engineering, New York, USA, 2019.
@conference{lebon_2525,
title = {PERFORMANCE INDICATORS FOR PROSTHESIS SURFACE INTEGRITY AFTER DENTAL CAD/CAM MILLING},
author = {Nicolas Lebon and Laurent Tapie and Elsa Vennat},
url = {https://cmbbe2019.com/},
year = {2019},
date = {2019-08-01},
booktitle = {16th International Symposium on Computer Methods in Biomechanics and Biomedical Engineering},
pages = {73},
address = {New York, USA},
edition = {16th},
abstract = {Various dental diseases lead to prosthetic rehabilitation. Today, prostheses can be manufactured from prefabricated biomaterial raw blocks, which are milled with a CAD/CAM process. The quality of these prostheses can be assessed using roughness, a major surface integrity (SI) component in dentistry [1]. SI is the characteristic signature of the milling process on the generated prosthesis shape [2]. The major challenge in restorative dentistry is to manufacture prostheses, which are able to rehabilitate the teeth in order to fulfil functional performance and aesthetic requirements. For each requirement, a specific SI might be manufactured in different anatomical area of the prosthesis. Aesthetics, biological response and restoration lifetime require a low surface roughness. On the contrary, the surface to be bonded on the remaining dental tissues needs to be sufficiently rough. The main difficulty for prosthesis manufacturers is to integrate the different expected SI during CAM process and to choose the milling process parameters in accordance with the expected prosthesis functionalities. This paper aims to evaluate and quantify the influence on SI of milling tools characteristics, biomaterials properties, and milling process parameters. A comparison to the clinically desired SI is conducted with two performance indicators (PI). a) a weighted relative mean PI named MSI. b) a weighted relative standard deviation PI named SISD. Based on milling experimental results capitalization and the clinically desired SI, the PI are locally computed among the prosthetic shape and displayed on a 3D mapping of the prosthesis shape (figure 1). The mapping results, applied on a crown prosthesis study case, show a limited influence of the tool feedrate parameter, whereas the tool diamond grit size, the tool/prosthesis inclination, and the biomaterials are more significant factors. The use of the PI during the CAM step emphasizes that a topological decomposition of the crown shape is necessary to associate reliable local milling process parameters. The PI provide a valuable assistance to the prosthesis manufacturers to choose efficiently milling parameters according to the prosthesis roughness requirements or to anticipate the post-processing polishing process. These PI can be enriched by new milling experimental results and new relevant SI components.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Nicolas Lebon
Usinabilité des biomatériaux utilisés en CFAO dentaires Conference
SFBD 2019, Université Paris Descartes Montrouge, France, 2019.
@conference{lebon_2535,
title = {Usinabilité des biomatériaux utilisés en CFAO dentaires},
author = {Nicolas Lebon},
url = {https://infos.parisdescartes.fr/actualites/evenement/congres-sfbd/},
year = {2019},
date = {2019-07-01},
booktitle = {SFBD 2019},
address = {Montrouge, France},
organization = {Université Paris Descartes},
abstract = {None},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Nicolas Lebon; Laurent Tapie; Elsa Vennat; Bernardin Mawussi
IMPACT DE L'USINAGE PAR CFAO SUR L'INTEGRITE DE SURFACE DES PROTHESES DENTAIRES CORONAIRES Conference
Matériaux pour la Santé 2018, St Etienne, France, 2018.
@conference{lebon_2524,
title = {IMPACT DE L'USINAGE PAR CFAO SUR L'INTEGRITE DE SURFACE DES PROTHESES DENTAIRES CORONAIRES},
author = {Nicolas Lebon and Laurent Tapie and Elsa Vennat and Bernardin Mawussi},
url = {https://www.mines-stetienne.fr/panoramines/2018/04/11/4emes-journees-annuelles-de-la-commission-materiaux-pour-la-sante/},
year = {2018},
date = {2018-05-01},
booktitle = {Matériaux pour la Santé 2018},
pages = {1},
address = {St Etienne, France},
abstract = {La réhabilitation des fonctions dentaires grâce à la pose de prothèses obtenues par CFAO est l'un des enjeux majeurs de la dentisterie restauratrice moderne. La qualité de ces prothèses peut être évaluée grâce à la rugosité, composante prépondérante des fonctionnalités surfaciques des prothèses dentaires. L'évaluation et la quantification de l'influence sur la rugosité résiduelle des paramètres du procédé d'usinage des prothèses, des propriétés des outils d'usinage et des biomatériaux mis en forme est un facteur clé dans le respect des fonctionnalités de la prothèse. En se basant sur une étude expérimentale simulant des configurations d'usinage de différents biomatériaux dentaires (Fig. 1), il est montré des influences significatives de la taille des grains des outils abrasifs, de l'orientation entre l'outil et la surface de la prothèse et du biomatériau mis en forme. D'autre part, il est aussi démontré l'importance de l'utilisation d'un jeu de paramètres de rugosité pour décrire la topologie de la surface prothétique usinée et de la confronter aux fonctionnalités attendues. Ceci a conduit à la définition d'indicateurs de performance de qualité des prothèses usinées et la mise en place d'un outil de simulation de rugosité résiduelle après usinage. La validation de l'outil de simulation sur un cas d'application de couronne prothétique dentaire montre qu'une décomposition topologique de la couronne est nécessaire afin de mieux respecter les fonctions prothétiques et fournit une aide précieuse au praticien ou technicien de laboratoire. Ainsi, pour un meilleur respect des fonctions prothétiques, chaque région topologique identifiée peut être associée à une stratégie d'usinage et un post-traitement de polissage des surfaces plus adaptés en se basant sur les indicateurs de performance de rugosité.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Nicolas Lebon; Laurent Tapie; Elsa Vennat; Bernardin Mawussi
A PROTOTYPE TOOL TO PREDICT DENTAL CROWN PROSTHESIS SURFACE ROUGHNESS AFTER MILLING Conference
22nd Congress of the European Society of Biomechanics, the European Society for Biomaterials, the International Society of Biomechanics, the International Lyon, France, 2016.
@conference{lebon_2526,
title = {A PROTOTYPE TOOL TO PREDICT DENTAL CROWN PROSTHESIS SURFACE ROUGHNESS AFTER MILLING},
author = {Nicolas Lebon and Laurent Tapie and Elsa Vennat and Bernardin Mawussi},
url = {https://esbiomech.org/conference/archive/2016lyon/abstracts.php},
year = {2016},
date = {2016-07-01},
booktitle = {22nd Congress of the European Society of Biomechanics},
pages = {1},
address = {Lyon, France},
organization = {the European Society for Biomaterials, the International Society of Biomechanics, the International},
abstract = {Dental crown prostheses are manufactured for the
rehabilitation of the tooth in order to fulfil functional
and aesthetic requirements. Milling of a block of
biomaterial achieves the manufacture of such
prosthesis. The milling process generates a
characteristic ?signature? on the prosthesis shape
called surface integrity. [1-3] Surface integrity is well
known and investigated in mechanical engineering
applications [2], but not well understood in restorative
dentistry. Several requirements of the prosthesis
surface such as aesthetics, biological response and
mechanical behaviour are influenced by the residual
roughness after milling. For each requirement, a
specific roughness might be manufactured in different
area of the prosthesis. [4-5] The main difficulty for
fixed partial denture manufacturers is to integrate the
different expected roughness during numerical
controlled milling process parameters choice. This
paper aims at providing a tool to help in predicting the
prosthesis roughness after milling.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Nicolas Lebon; Laurent Tapie; Elsa Vennat; Bernardin Mawussi
INFLUENCE DE L'ORIENTATION OUTIL/MATIERE SUR L'INTEGRITE DE SURFACE DES BIOMATERIAUX DENTAIRES Conference
22ème Congrès Français de Mécanique, Lyon, France, 2015.
@conference{lebon_2527,
title = {INFLUENCE DE L'ORIENTATION OUTIL/MATIERE SUR L'INTEGRITE DE SURFACE DES BIOMATERIAUX DENTAIRES},
author = {Nicolas Lebon and Laurent Tapie and Elsa Vennat and Bernardin Mawussi},
url = {https://cfm2015.sciencesconf.org/},
year = {2015},
date = {2015-08-01},
booktitle = {22ème Congrès Français de Mécanique},
pages = {1-11},
address = {Lyon, France},
abstract = {La dentisterie moderne utilise la voie de la CFAO pour produire par usinage des prothèses dentaires. La rugosité est un critère important de pérennité des prothèses dentaires. L'orientation du contact outil/matière lors de l'usinage de matériaux métalliques sur la rugosité est connue et étudiée. Malheureusement, peu d'études sur la rugosité des biomatériaux non métalliques après usinage sont menées pour comprendre l'impact de l'orientation outil sur la rugosité des prothèses. L'influence, sur la rugosité, de l'orientation outil/matière lors de l'usinage, par abrasion de blocs de biomatériaux dentaires, par la voie CFAO a donc été étudiée. Trois orientations (0°, 60°, 90°) ont été testées sur des
blocs de biomatériaux (Vita Enamic). L'influence de l'orientation sur la rugosité a été testée pour 4 vitesses d'avance (1000-2000-3000-4800mm/min). Les résultats montrent que l'orientation outil/matière a une influence sur la rugosité. La vitesse d'avance n'a pas d'effet sur la rugosité, quelle que soit l'orientation. Il semblerait donc que le choix d'une vitesse d'avance élevée, et une adaptation de l'orientation outil/matière en fonction de la rugosité souhaitée, permettent d'optimiser l'intégrité de surface et le temps de production.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Daniel Wladdimiro; Claudine Wulfman; Boris Jakubowicz; Mathieu Derbanne; Bruno Zamansky; Nicolas Lebon; Stéphane Le Goff; Aurélie Dubroca; Laurent Tapie; Jean-Pierre Attal
The CAD/CAM unit in Paris Descartes University: for and by students Conference
CONSEURO 2015, London, England, 2015.
@conference{wladdimiro_2516,
title = {The CAD/CAM unit in Paris Descartes University: for and by students},
author = {Daniel Wladdimiro and Claudine Wulfman and Boris Jakubowicz and Mathieu Derbanne and Bruno Zamansky and Nicolas Lebon and Stéphane Le Goff and Aurélie Dubroca and Laurent Tapie and Jean-Pierre Attal},
editor = {Clin Oral Inves},
url = {DOI 10.1007/s00784-015-1486-4},
year = {2015},
date = {2015-05-01},
booktitle = {CONSEURO 2015},
pages = {1701-1754},
address = {London, England},
abstract = {Objective: To include CAD/CAM technologies in oral rehabilitation teaching. Three difficulties arise when bringing and applying the theoretical knowledge in clinical training: To offer a standard teaching to all students, In 4 dental units located in different hospitals, Under a high level supervision. Materials and method: A dedicated room is equipped with three different
CAD/CAM systems and a 3D printer, as well as characterization and polishing kits (ceramic, composite and furnace). In clinic, with his teacher, the student indicates the partial restoration and performs preparation
and impression (conventional or optical). Design and manufacturing are realized at the faculty under the supervision of a multidisciplinary team, including biomaterials, prosthodontics and conservative dentistry teachers, prosthodontics technicians, engineering specialists and researchers. Results: In this privileged dialogue about a patient, the student discovers the unit scientific interest, as all clinical relevant information about patients, clinical situation and restoration features is recorded for a long-term cohort study. Teachers note a better comprehension of preparation needs and tissue preservation while the student manages the whole process of partial denture restoration. His understanding widens when confronted to clinical situation, cast model and 3D reconstruction. Discussion and conclusion: CAD/CAMis a key teaching in 21st century dental curriculum. These new technologies confront us to a new educational challenge. Because of the limited background available, a multidisciplinar team is necessary to explore the opportunities they open as well as their limitations. From this point of view, collaboration with researchers is essential.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Claudine Wulfman; Daniel Wladdimiro; Boris Jakubowicz; Mathieu Derbanne; Bruno Zamansky; Nicolas Lebon; Stéphane Le Goff; Aurélie Dubroca; Laurent Tapie; Jean-Pierre Attal
L'unité CFAO à Paris Descartes: pour et par les étudiants Conference
Collège National d'Occlusodontologie 2015, Deauville, France, 2015.
@conference{wulfman_2517,
title = {L'unité CFAO à Paris Descartes: pour et par les étudiants},
author = {Claudine Wulfman and Daniel Wladdimiro and Boris Jakubowicz and Mathieu Derbanne and Bruno Zamansky and Nicolas Lebon and Stéphane Le Goff and Aurélie Dubroca and Laurent Tapie and Jean-Pierre Attal},
url = {http://www.occluso.com/670_p_39286/journees-deauville-2015.html},
year = {2015},
date = {2015-03-01},
booktitle = {Collège National d'Occlusodontologie 2015},
address = {Deauville, France},
abstract = {None},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Nicolas Lebon
Fichier STL Book Section
In: de l'ingénieur, Techniques (Ed.): Techniques de l'ingénieur, vol. BM7982 V1, pp. 1-14, Techniques de l'ingénieur, Immeuble Pleyad 1 39, boulevard Ornano 93288 Saint-Denis Cedex, 2023, ISBN: 978-2-85059.
@incollection{lebon_2855,
title = {Fichier STL},
author = {Nicolas Lebon},
editor = {Techniques de l'ingénieur},
url = {https://www.techniques-ingenieur.fr/base-documentaire/mecanique-th7/chaine-de-valeur-et-mise-en-uvre-42687210/fichier-stl-bm7982/},
issn = {978-2-85059},
year = {2023},
date = {2023-01-01},
booktitle = {Techniques de l'ingénieur},
volume = {BM7982 V1},
pages = {1-14},
publisher = {Techniques de l'ingénieur},
address = {Immeuble Pleyad 1 39, boulevard Ornano 93288 Saint-Denis Cedex},
abstract = {L'utilisation des fichiers STL est devenue courante depuis ces dernières années avec la démocratisation des procédés de fabrication additive et aussi l'avènement des techniques numériques dans le domaine de la santé. Ces deux technologies, entre autres, utilisent le fichier STL pour modéliser géométriquement des formes complexes. Après une définition de cette extension de fichier, une description des informations importantes liées à son exploitation est apportée. Ensuite des méthodes de calcul de la surface d'un maillage STL et du volume inclus à l'intérieur sont décrites. Les défauts courants et les critères clés permettant de quantifier la qualité géométrique d'un maillage STL sont détaillés. Enfin, des alternatives sont proposées afin de pallier certains inconvénients du format STL.},
note = {https://doi.org/10.51257/a-v1-bm7982},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
Nicolas Lebon; Laurent Tapie
Intégrité de surface en usinage - Application à la prothèse dentaire conjointe Book Section
In: de l'ingénieur, Techniques (Ed.): Techniques de l'ingénieur, vol. MED7320 V1, pp. 1-21, Techniques de l'ingénieur, Immeuble Pleyad 1 39, boulevard Ornano 93288 Saint-Denis Cedex, 2020, ISBN: 978-2-85059.
@incollection{lebon_2488,
title = {Intégrité de surface en usinage - Application à la prothèse dentaire conjointe},
author = {Nicolas Lebon and Laurent Tapie},
editor = {Techniques de l'ingénieur},
url = {https://www.techniques-ingenieur.fr/base-documentaire/biomedical-pharma-th15/biomateriaux-42606210/integrite-de-surface-en-usinage-med7320/},
issn = {978-2-85059},
year = {2020},
date = {2020-09-01},
booktitle = {Techniques de l'ingénieur},
volume = {MED7320 V1},
pages = {1-21},
publisher = {Techniques de l'ingénieur},
address = {Immeuble Pleyad 1 39, boulevard Ornano 93288 Saint-Denis Cedex},
abstract = {L'intégrité de surface est définie comme la signature résiduelle multi-physique (biologique, mécanique, optique) et multi-échelle (du mm au nm) laissée par le procédé de fabrication sur la surface mise en forme. Ce concept permet de lier le procédé de fabrication aux fonctionnalités attendues sur une pièce. Appliqué à la prothèse dentaire il permet ainsi d'établir les corrélations existantes entre le procédé de mise en forme des prothèses dentaires et les fonctionnalités cliniques attendues sur ces dernières. Cet
article détaille les principales composantes de l'intégrité de surface, ainsi que leurs corrélations au sein du triptyque procédé-intégrité de surface-fonctionnalités attendues.},
note = {https://doi.org/10.51257/a-v1-med7320},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
Nicolas Lebon; kyo shindo; Laurent Tapie
CFAO en ingénierie biomédicale - Dentisterie prothétique numérique Book Section
In: de l'ingénieur, Techniques (Ed.): Techniques de l'ingénieur, vol. MED7310 V1, pp. 1-26, Techniques de l'ingénieur, Immeuble Pleyad 1 39, boulevard Ornano 93288 Saint-Denis Cedex, 2019, ISBN: 978-2-85059.
@incollection{lebon_2489,
title = {CFAO en ingénierie biomédicale - Dentisterie prothétique numérique},
author = {Nicolas Lebon and kyo shindo and Laurent Tapie},
editor = {Techniques de l'ingénieur},
url = {https://www.techniques-ingenieur.fr/base-documentaire/biomedical-pharma-th15/biomateriaux-42606210/cfao-en-ingenierie-biomedicale-med7310/},
issn = {978-2-85059},
year = {2019},
date = {2019-03-01},
booktitle = {Techniques de l'ingénieur},
volume = {MED7310 V1},
pages = {1-26},
publisher = {Techniques de l'ingénieur},
address = {Immeuble Pleyad 1 39, boulevard Ornano 93288 Saint-Denis Cedex},
abstract = {Cet article traite de la conception et fabrication assistées par ordinateur (CFAO) et des technologies numériques appliquées au secteur biomédical de la dentisterie. Le concept de CFAO en ingénierie biomédicale est présenté puis illustré à travers ses usages en dentisterie. Ensuite, les chaînes numériques dédiées à la fabrication de prothèses dentaires sont présentées. Les méthodologies CFAO mises en oeuvre dans la pratique quotidienne des chirurgiens-dentistes et des prothésistes dentaires sont analysées selon le point de vue de l'ingénierie mécanique. Enfin, les impacts socio-économiques issus de l'émergence de la CFAO et des nouvelles technologies au service de la santé sont traités.},
note = {https://doi.org/10.51257/a-v1-med7310},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
Nicolas Lebon; Marie Josephine Crenn; Frédéric Chamieh; Bruno Pelissier; Géraldine Rohman; Olivier Fromentin
Procédés modernes de mise en forme des matériaux en odontologie Book Section
In: SAS, Elsevier Masson (Ed.): EM Consulte - Médecine buccale, vol. 28-672-G-10, pp. 1-18, Elsevier Masson SAS, 65 rue Camille Desmoulins, 92130 ISSY LES MOULINEAUX, 2017, ISBN: 1877-7864.
@incollection{lebon_2491,
title = {Procédés modernes de mise en forme des matériaux en odontologie},
author = {Nicolas Lebon and Marie Josephine Crenn and Frédéric Chamieh and Bruno Pelissier and Géraldine Rohman and Olivier Fromentin},
editor = {Elsevier Masson SAS},
url = {https://www.em-consulte.com/article/1184419/procedes-modernes-de-mise-en-forme-des-materiaux-e},
issn = {1877-7864},
year = {2017},
date = {2017-12-01},
booktitle = {EM Consulte - Médecine buccale},
volume = {28-672-G-10},
pages = {1-18},
publisher = {Elsevier Masson SAS},
address = {65 rue Camille Desmoulins, 92130 ISSY LES MOULINEAUX},
abstract = {En odontologie prothétique, les techniques de conception et fabrication assistées par ordinateur (CFAO) permettent de mettre en forme différents biomatériaux afin de réaliser intégralement ou partiellement des dispositifs prothétiques individualisés. En matière de fabrication, plusieurs procédés sont possibles, soit par soustraction ou enlèvement de matière (usinage par fraisage), soit par addition. Cette dernière catégorie regroupe un ensemble de moyens technologiques de mise en forme dont l'extrusion et la projection de matière, la photopolymérisation en cuve, ainsi que la fusion sur lit de poudre. Le but de cet article est de décrire ces différents procédés et d'en préciser les avantages, limites et applications essentielles en matière de fabrication de dispositifs prothétiques individualisés.},
note = {Doi : 10.1016/S1877-7864(17)78972-0},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
Nicolas Lebon; Laurent Tapie
Surface Integrity of Pre-sintered Ceramics and Composites Used for Dental Prostheses After CAD/CAM Abrasive Milling Proceedings Article
In: ELSEVIER, (Ed.): 6th CIRP Conference on Surface Integrity, pp. 252-257, ScienceDirect, Lyon, France, 2022, ISBN: ISSN 2212-8271.
@inproceedings{lebon_2495,
title = {Surface Integrity of Pre-sintered Ceramics and Composites Used for Dental Prostheses After CAD/CAM Abrasive Milling},
author = {Nicolas Lebon and Laurent Tapie},
editor = {ELSEVIER},
url = {https://www.sciencedirect.com/science/article/pii/S2212827122005200?via%3Dihub},
issn = {ISSN 2212-8271},
year = {2022},
date = {2022-06-01},
booktitle = {6th CIRP Conference on Surface Integrity},
volume = {108},
number = {8},
pages = {252-257},
publisher = {ScienceDirect},
address = {Lyon, France},
edition = {2022},
abstract = {All-ceramic fixed partial dental restorations are milled by CAD/CAM process. The significant challenges for such prostheses manufacturing are respecting functional and aesthetic requirements. Specific surface integrity (SI) might be manufactured in different anatomical and assembly prosthesis areas. Aesthetics, biological and mechanical responses require a low surface roughness. Contrariwise, the surface to be bonded needs to be sufficiently rough. The CAD/CAM process's influence on prosthesis SI is not investigated in the industrial and scientific restorative dentistry community. This paper evaluates the influence of tools, biomaterials, and milling parameters on SI, especially the roughness, leading to topological decomposition of the prosthesis shape.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Aurélie Benoit; Hiba Issaoui; Nicolas Lebon
Impact of machining process on the flexural strength of CAD/CAM blocks for dental restorations Proceedings Article
In: Taylor,; Francis, (Ed.): Computer Methods in Biomechanics and Biomedical Engineering, pp. S31-S32, 45th Congress of the Société de Biomécanique Informa, London, England, 2020, ISBN: 1476-8259.
@inproceedings{benoit_2510,
title = {Impact of machining process on the flexural strength of CAD/CAM blocks for dental restorations},
author = {Aurélie Benoit and Hiba Issaoui and Nicolas Lebon},
editor = {Taylor & Francis},
url = {https://www.tandfonline.com/doi/full/10.1080/10255842.2020.1811501},
issn = {1476-8259},
year = {2020},
date = {2020-11-01},
booktitle = {Computer Methods in Biomechanics and Biomedical Engineering},
volume = {23},
number = {S1},
pages = {S31-S32},
publisher = {Informa},
address = {London, England},
organization = {45th Congress of the Société de Biomécanique},
abstract = {None},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Nicolas Lebon; Laurent Tapie; Elsa Vennat; Bernardin Mawussi
A Computer-Aided Tool to Predict Dental Crown Prosthesis Surface Integrity after Milling Proceedings Article
In: CAD Conference 2018, pp. 231-235, U-turn Press LLC, Paris, France, 2018, ISBN: 2769-8440.
@inproceedings{lebon_2521,
title = {A Computer-Aided Tool to Predict Dental Crown Prosthesis Surface Integrity after Milling},
author = {Nicolas Lebon and Laurent Tapie and Elsa Vennat and Bernardin Mawussi},
url = {http://www.cad-conference.net/files/CAD18/CAD18-paris.html},
issn = {2769-8440},
year = {2018},
date = {2018-07-01},
booktitle = {CAD Conference 2018},
pages = {231-235},
publisher = {U-turn Press LLC},
address = {Paris, France},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Nicolas Lebon; Laurent Tapie; Elsa Vennat; Bernardin Mawussi; Jean-Pierre Attal
Influence of the tool-material couple on the dental CAD/CAM prosthetic roughness Proceedings Article
In: Joint Conference on Mechanical, Design Engineering & Advanced Manufacturing, AIP-PRIMECA Toulouse, France, 2014, ISBN: 978-3-319-26119-5.
@inproceedings{lebon_2528,
title = {Influence of the tool-material couple on the dental CAD/CAM prosthetic roughness},
author = {Nicolas Lebon and Laurent Tapie and Elsa Vennat and Bernardin Mawussi and Jean-Pierre Attal},
url = {https://idmme2014.sciencesconf.org/},
issn = {978-3-319-26119-5},
year = {2014},
date = {2014-06-01},
booktitle = {Joint Conference on Mechanical, Design Engineering & Advanced Manufacturing},
address = {Toulouse, France},
organization = {AIP-PRIMECA},
abstract = {This study aims at investigating the tool-material couple in CAD/CAM dental machining. The tool-material couple is studied through the observation of milled surface
roughness and tool geometrical properties. The influence of two tool-material couple parameters is also studied: the feedrate and the milling mode (flank, top). Three diamond burs and three dental biomaterials (ceramic, polymer, hybrid) were tested. The surface roughness was observed for nine tool-material couples in flank and top milling. Ra, Rt, Rz, Sa, Sq, Sz roughness criteria were
measured. It has been concluded that in flank milling the
measured surface roughness is in direct proportion to the diamond tool grain size. In top milling, the roughness is mainly due to the diamond grain size, and the radial depth is not a predominant parameter. The surface roughness was influenced by material hardness in flank milling mode. Moreover, the surface roughness was not affected by the feedrate.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Nicolas Lebon
CINÉMATIQUES DES MOCN DESTINÉES AU SECTEUR DENTAIRE Miscellaneous
BioMatériaux Cliniques (L'information dentaire), 2023.
@misc{lebon_2505,
title = {CINÉMATIQUES DES MOCN DESTINÉES AU SECTEUR DENTAIRE},
author = {Nicolas Lebon},
url = {https://www.information-dentaire.fr/formations/cinematiques-des-mocn-destinees-au-secteur-dentaire/},
year = {2023},
date = {2023-03-01},
volume = {6(1)},
pages = {95-101},
howpublished = {BioMatériaux Cliniques (L'information dentaire)},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
Nicolas Lebon
LE MOUVEMENT D'AVANCE EN FRAISAGE Miscellaneous
BioMatériaux Cliniques (L'information dentaire), 2020.
@misc{lebon_2504,
title = {LE MOUVEMENT D'AVANCE EN FRAISAGE},
author = {Nicolas Lebon},
url = {https://www.information-dentaire.fr/formations/le-mouvement-d-avance-en-fraisage/},
year = {2020},
date = {2020-03-01},
volume = {5(1)},
pages = {1-5},
howpublished = {BioMatériaux Cliniques (L'information dentaire)},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
Nicolas Lebon
LE MOUVEMENT DE COUPE EN FRAISAGE Miscellaneous
BioMatériaux Cliniques (L'information dentaire), 2019.
@misc{lebon_2502,
title = {LE MOUVEMENT DE COUPE EN FRAISAGE},
author = {Nicolas Lebon},
url = {https://www.information-dentaire.fr/formations/le-mouvement-de-coupe-en-fraisage/},
year = {2019},
date = {2019-10-01},
volume = {4(1)},
pages = {20-24},
howpublished = {BioMatériaux Cliniques (L'information dentaire)},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
Nicolas Lebon
PROCÉDÉS DE MISE EN FORME PAR USINAGE : CAS DU FRAISAGE Miscellaneous
BioMatériaux Cliniques (L'information dentaire), 2018.
@misc{lebon_2501,
title = {PROCÉDÉS DE MISE EN FORME PAR USINAGE : CAS DU FRAISAGE},
author = {Nicolas Lebon},
url = {https://www.information-dentaire.fr/formations/procedes-de-mise-en-forme-par-usinage%E2%80%89-cas-du-fraisage/},
year = {2018},
date = {2018-10-01},
volume = {3(2)},
pages = {92-95},
howpublished = {BioMatériaux Cliniques (L'information dentaire)},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
Nicolas Lebon
ÉTAT DE SURFACE : SÉPARATION DES DÉFAUTS Miscellaneous
BioMatériaux Cliniques (L'information dentaire), 2018.
@misc{lebon_2500,
title = {ÉTAT DE SURFACE : SÉPARATION DES DÉFAUTS},
author = {Nicolas Lebon},
url = {https://www.information-dentaire.fr/formations/etat-de-surface%E2%80%89-separation-des-defauts/},
year = {2018},
date = {2018-03-01},
volume = {3(1)},
pages = {96-101},
howpublished = {BioMatériaux Cliniques (L'information dentaire)},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
Nicolas Lebon
ÉTAT DE SURFACE ET RUGOSITÉ DES PIÈCES PROTHÉTIQUES Miscellaneous
BioMatériaux Cliniques (L'information dentaire), 2017.
@misc{lebon_2499,
title = {ÉTAT DE SURFACE ET RUGOSITÉ DES PIÈCES PROTHÉTIQUES},
author = {Nicolas Lebon},
url = {https://www.information-dentaire.fr/formations/etat-de-surface-et-rugosite-des-pieces-prothetiques/},
year = {2017},
date = {2017-03-01},
volume = {2(1)},
pages = {41-45},
howpublished = {BioMatériaux Cliniques (L'information dentaire)},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
Jean-Pierre Attal; Laurent Tapie; Nicolas Lebon
Le flux numérique en CFAO dentaire pour la prothèse conjointe Miscellaneous
Réalités Cliniques, 2015.
@misc{attal_2518,
title = {Le flux numérique en CFAO dentaire pour la prothèse conjointe},
author = {Jean-Pierre Attal and Laurent Tapie and Nicolas Lebon},
url = {https://www.information-dentaire.fr/formations/le-flux-numerique-en-cfao-dentaire-pour-la-prothese-conjointe/},
year = {2015},
date = {2015-12-01},
volume = {4},
pages = {274-282},
howpublished = {Réalités Cliniques},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
Jean-Pierre Attal; Laurent Tapie; Nicolas Lebon
La chaîne numérique en CFAO dentaire en prothèse conjointe Miscellaneous
Réalités Cliniques, 2015.
@misc{attal_2519,
title = {La chaîne numérique en CFAO dentaire en prothèse conjointe},
author = {Jean-Pierre Attal and Laurent Tapie and Nicolas Lebon},
url = {https://www.information-dentaire.fr/formations/la-chaine-numerique-en-cfao-dentaire-en-prothese-conjointe/},
year = {2015},
date = {2015-12-01},
volume = {4},
pages = {263-273},
howpublished = {Réalités Cliniques},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
Nicolas Lebon
IMPACT DE L'USINAGE PAR CFAO SUR L'INTEGRITE DE SURFACE DES PROTHESES DENTAIRES CORONAIRES PhD Thesis
Université Paris 13, 2017.
@phdthesis{lebon_2486,
title = {IMPACT DE L'USINAGE PAR CFAO SUR L'INTEGRITE DE SURFACE DES PROTHESES DENTAIRES CORONAIRES},
author = {Nicolas Lebon},
url = {https://www.theses.fr/2017USPCD031},
year = {2017},
date = {2017-07-01},
address = {99 Avenue J.B. Clément 93430 Villetaneuse},
school = {Université Paris 13},
keywords = {},
pubstate = {online},
tppubtype = {phdthesis}
}
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