Three-dimensional finite element analysis on the effect of posterior cross-bite of individual teeth on temporomandibular joint
10.3760/cma.j.issn.1002-0098.2013.02.006
- VernacularTitle:个别后牙反(牙合)对颞下颌关节应力影响的三维有限元研究
- Author:
You-Lai LIN
1
;
Yue-Hua LIU
;
Dong-Mei WANG
;
Jun-Wu XU
Author Information
1. 福建医科大学省立临床医学院福建省立医院口腔科
- Keywords:
Malocclusion;
Temporomandibular joint;
Finite element analysis
- From:
Chinese Journal of Stomatology
2013;48(2):86-90
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the stress distribution of temporomandibular joint (TMJ) in posterior cross-bite of individual teeth and in normal occlusion during the intercuspal occlusion (ICO).Methods On the basis of the geometric TMJ model of normal occlusion,the TMJ finite element model of posterior cross-bite of individual teeth was reconstructed.The occlusal force and boundary conditions were applied on the model.Using three-dimensional finite element method (FEM),the stress distribution of TMJ in posterior cross-bite of individual teeth was analyzed by simulating the ICO load.Results No significant differences were found in stress distribution in various TMJ structures between posterior cross-bite of individual teeth and normal occlusion.However,the stress level was higher and the stress distribution was more inhomogeneous in posterior cross-bite of individual teeth than in normal occlusion.In the cross-bite malocclusion of individual posterior teeth,the maximum of von Mises stress was 0.792 MPa,the maximum principal stress was 0.598 MPa and the mimimum principal stress was-0.744 MPa.But in normal occlusion,the maximum of von Mises stress was 0.592 MPa,the maximum principal stress was 0.395 MPa and the mimimum principal stress was-0.554 MPa.Conclusions When the ICO load was applied,the stress distribution of TMJ was more inhomogeneous and the stress level was higher in posterior cross-bite of individual teeth than in normal occlusion.
