Tags

Type your tag names separated by a space and hit enter

Efficiency of a mathematical model in generating CAD/CAM-partial crowns with natural tooth morphology.
Clin Oral Investig. 2011 Apr; 15(2):283-9.CO

Abstract

The "biogeneric tooth model" can be used for computer-aided design (CAD) of the occlusal surface of dental restorations. From digital 3D-data, it automatically retrieves a morphology matching the natural surface left after preparation. This study evaluates the potential of this method for generating well-matched and well-adjusted CAD/computer-aided manufacturing (CAM) fabricated partial crowns. Twelve models with partial crown preparations were mounted into an articulator. Partial crowns were designed with the Cerec 3D CAD software based on the biogeneric tooth model (Biog.CAD) and, for control, with a conventional data-based Cerec 3D CAD software (Conv.CAD). The design time was measured, and the naturalness of the morphology was visually assessed. The restorations were milled, cemented on the models, and the vertical discrepancy and the time for final occlusal adjustment were measured. The Biog.CAD software offered a significantly higher naturalness (up to 225 to 11 scores) and was significantly faster by 251 (± 78) s in designing partial crowns (p < 0.01) compared to Conv.CAD software. Vertical discrepancy, 0.52 (± 0.28) mm for Conv.CAD and 0.46 (± 0.19)mm for Biog.CAD, and occlusal adjustment time, 118 (± 132)s for Conv.CAD and 102 (± 77)s for Biog.CAD, did not differ significantly. In conclusion, the biogeneric tooth model is able to generate occlusal morphology of partial crowns in a fully automated process with higher naturalness compared to conventional interactive CAD software.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Ender A
Division of Computer Restorations, Department of Preventive Dentistry, Cariology, and Periodontology, Center for Dental and Oral Medicine, University of Zürich, Zürich, Switzerland. andreas.ender@zzmk.uzh.ch
Mörmann WH
No affiliation info available
Mehl A
No affiliation info available

MeSH

AdolescentAdultComputer-Aided DesignCrownsDental ModelsDental PorcelainDental Prosthesis DesignFemaleHumansLinear ModelsMaleModels, TheoreticalOcclusal AdjustmentSoftwareStatistics, NonparametricSurveys and QuestionnairesTime FactorsTooth Preparation, ProsthodonticVertical DimensionYoung Adult

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

20143242

Clinical Trial Links

Basic Study of Fabricating Biomorphic Crowns

Citation

Ender, Andreas, et al. "Efficiency of a Mathematical Model in Generating CAD/CAM-partial Crowns With Natural Tooth Morphology." Clinical Oral Investigations, vol. 15, no. 2, 2011, pp. 283-9.
Ender A, Mörmann WH, Mehl A. Efficiency of a mathematical model in generating CAD/CAM-partial crowns with natural tooth morphology. Clin Oral Investig. 2011;15(2):283-9.
Ender, A., Mörmann, W. H., & Mehl, A. (2011). Efficiency of a mathematical model in generating CAD/CAM-partial crowns with natural tooth morphology. Clinical Oral Investigations, 15(2), 283-9. https://doi.org/10.1007/s00784-010-0384-z
Ender A, Mörmann WH, Mehl A. Efficiency of a Mathematical Model in Generating CAD/CAM-partial Crowns With Natural Tooth Morphology. Clin Oral Investig. 2011;15(2):283-9. PubMed PMID: 20143242.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Efficiency of a mathematical model in generating CAD/CAM-partial crowns with natural tooth morphology. AU - Ender,Andreas, AU - Mörmann,Werner H, AU - Mehl,Albert, Y1 - 2010/02/09/ PY - 2009/08/04/received PY - 2010/01/12/accepted PY - 2010/2/10/entrez PY - 2010/2/10/pubmed PY - 2011/7/19/medline SP - 283 EP - 9 JF - Clinical oral investigations JO - Clin Oral Investig VL - 15 IS - 2 N2 - The "biogeneric tooth model" can be used for computer-aided design (CAD) of the occlusal surface of dental restorations. From digital 3D-data, it automatically retrieves a morphology matching the natural surface left after preparation. This study evaluates the potential of this method for generating well-matched and well-adjusted CAD/computer-aided manufacturing (CAM) fabricated partial crowns. Twelve models with partial crown preparations were mounted into an articulator. Partial crowns were designed with the Cerec 3D CAD software based on the biogeneric tooth model (Biog.CAD) and, for control, with a conventional data-based Cerec 3D CAD software (Conv.CAD). The design time was measured, and the naturalness of the morphology was visually assessed. The restorations were milled, cemented on the models, and the vertical discrepancy and the time for final occlusal adjustment were measured. The Biog.CAD software offered a significantly higher naturalness (up to 225 to 11 scores) and was significantly faster by 251 (± 78) s in designing partial crowns (p < 0.01) compared to Conv.CAD software. Vertical discrepancy, 0.52 (± 0.28) mm for Conv.CAD and 0.46 (± 0.19)mm for Biog.CAD, and occlusal adjustment time, 118 (± 132)s for Conv.CAD and 102 (± 77)s for Biog.CAD, did not differ significantly. In conclusion, the biogeneric tooth model is able to generate occlusal morphology of partial crowns in a fully automated process with higher naturalness compared to conventional interactive CAD software. SN - 1436-3771 UR - https://www.unboundmedicine.com/medline/citation/20143242/Efficiency_of_a_mathematical_model_in_generating_CAD/CAM_partial_crowns_with_natural_tooth_morphology_ L2 - https://dx.doi.org/10.1007/s00784-010-0384-z DB - PRIME DP - Unbound Medicine ER -