Dynamic modelling of tooth deformation using occlusal kinematics and finite element analysis

  • Background: Dental biomechanics based on finite element (FE) analysis is attracting enormous interest in dentistry, biology, anthropology and palaeontology. Nonetheless, several shortcomings in FE modeling exist, mainly due to unrealistic loading conditions. In this contribution we used kinematics information recorded in a virtual environment derived from occlusal contact detection between high resolution models of an upper and lower human first molar pair (M1 and M1, respectively) to run a non-linear dynamic FE crash colliding test. Methodology: MicroCT image data of a modern human skull were segmented to reconstruct digital models of the antagonistic right M1 and M1 and the dental supporting structures. We used the Occlusal Fingerprint Analyser software to reconstruct the individual occlusal pathway trajectory during the power stroke of the chewing cycle, which was applied in a FE simulation to guide the M1 3D-path for the crash colliding test. Results: FE analysis results showed that the stress pattern changes considerably during the power stroke, demonstrating that knowledge about chewing kinematics in conjunction with a morphologically detailed FE model is crucial for understanding tooth form and function under physiological conditions. Conclusions/Significance: Results from such advanced dynamic approaches will be applicable to evaluate and avoid mechanical failure in prosthodontics/endodontic treatments, and to test material behavior for modern tooth restoration in dentistry. This approach will also allow us to improve our knowledge in chewing-related biomechanics for functional diagnosis and therapy, and it will help paleoanthropologists to illuminate dental adaptive processes and morphological modifications in human evolution.

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Author:Stefano BenazziORCiDGND, Huynh Nhu NguyenORCiD, Ottmar KullmerORCiDGND, Kornelius KupczikORCiDGND
Parent Title (English):PLoS One1/journal.pone.0152663
Place of publication:Lawrence, Kan.
Document Type:Article
Date of Publication (online):2016/03/31
Date of first Publication:2016/03/31
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2016/05/23
Issue:(3): e0152663
Page Number:17
First Page:1
Last Page:17
Copyright: © 2016 Benazzi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Institutes:Angeschlossene und kooperierende Institutionen / Senckenbergische Naturforschende Gesellschaft
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 56 Fossilien, Paläontologie / 560 Paläontologie; Paläozoologie
Licence (German):License LogoCreative Commons - Namensnennung 4.0