Three-Dimensional Computer Modelling and Stress-Strain Analysis of Temporomandibular Joint

Abstract

The main purpose of the study is to build 3D model of temporomandibular joint and mandible using programs for modelling and design, research stress and strain in cartilage and bone of model depending on different contraction of chewing muscles (especially lateral pterygoid muscle). There were used such methods as computer tomography data, finite element method and analysis topography of lateral pterygoid muscle on cadavers. In results of study was obtained maximal stress in anterior and distal parts of articular disc between 1,4–3 MPa and 0,4–1 MPa. Thus, static loads of articular disc were different, depends on force of contraction lateral pterygoid muscle. Muscle disturbances (hyperfunctioning, atrophy etc.) should be considered in treatment of temporomandibular dysfunction and examined on magnetic resonance investigation if it is present in the same patient.