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VOLUME 8 , ISSUE 2 ( 2016 ) > List of Articles


Effect of Different Occlusal Loads on Periodontium: A Three-dimensional Finite Element Analysis

Kharidhi Laxman Vandana, Shaima Muneer

Keywords : Finite element analysis, Hyperfunctional load, Hypofunctional load, Stress, Trauma from occlusion.

Citation Information : Vandana KL, Muneer S. Effect of Different Occlusal Loads on Periodontium: A Three-dimensional Finite Element Analysis. CODS J Dent 2016; 8 (2):78-90.

DOI: 10.5005/jp-journals-10063-0018

License: CC BY-NC-ND 3.0

Published Online: 01-09-2018

Copyright Statement:  Copyright © 2016; The Author(s).


Introduction: The periodontal tissue reaction to variations in occlusal forces has been described in the literature where in clinical and histologic changes are discussed that produced due to stresses in the periodontal structures. Unfortunately, these stresses are not quantified. Aim: The aim of this study is to determine the stress produced on various periodontal tissues at different occlusal loads using finite element model (FEM) study. Materials and methods: Four FEMs of maxillary incisor were designed consisting of the tooth, pulp, periodontal ligament (PDL), and alveolar bone at the various levels of bone height (25, 50, and 75%). Different occlusal loads (5, 15, 24, and 29 kg) at an angle of 50° to the long axis of the tooth were applied on the palatal surface at the level of middle third of the crown. All the models were assumed to be isotropic, linear, and elastic, and the analysis was performed on a Pentium IV processor computer using ANSYS software. Results: At normofunction load, the stresses were maximum on the mesial side near the cervical region at point D for tooth (-10.93 MPa), for PDL (-4.06 MPa), for bone (-4.3 MPa); with normal bone levels, as the bone levels decreased the stresses increased and the stresses tend to concentrate at the apical region. At any given point, the stresses were increased by 60 and 90% at hyperfunctional loads of 24 and 29 kg respectively, and with hypofunctional load of 5 kg, stresses were reduced by 60%. Conclusion: Based on the findings of the present study, there is reasonably good attempt to express numerical data of stress to be given normal occlusal and hyperfunctional loads to simulate clinical occlusal situations which are known to be responsible for healthy and diseased periodontium.

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