J Dent Rehabil Appl Sci.  2020 Jun;36(2):112-120. 10.14368/jdras.2020.36.2.112.

Comparison of the outcomes of three-dimensional finite element analysis under arbitrary and realistic occlusal loading conditions in mandibular posterior region

Affiliations
  • 1Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
  • 2Department of Computer Science and Engineering, Seoul National University, Seoul, Republic of Korea
  • 3Department of Oral Anatomy, Seoul National University School of Dentistry and Dental Research Institute, Seoul, Republic of Korea
  • 4Dental Research Institute and Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea

Abstract

Purpose
The purpose of this study was to compare the biomechanical outcome in the mandibular posterior region between two different loading conditions by finite element analysis.
Materials and Methods
The mandibular posterior teeth model and the implant model were generated for the study. And 2 different types of loading conditions were provided: Arbitrary occlusion and natural occlusion obtained from the digital occlusal analyzer, Accura (Accura, Dmetec Co. Ltd., Seoul, Korea). Total load of 100 N was evenly distributed over arbitrary occlusion points, and 100 N load was differentially distributed over natural occlusion points according to Accura data. The biomechanical outcome was evaluated by the finite element analysis software.
Results
The result of finite element analysis showed considerable difference in both von Mises stress pattern and displacement under different loading conditions.
Conclusion
In finite element analysis, it is recommended to simulate a realistic occlusal loading pattern that is based on accurate measurement.

Keyword

digital occlusal analyzer; occlusion; finite element analysis
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