Three-dimensional finite element analysis of unilateral mastication in malocclusion cases using cone-beam computed tomography and a motion capture system.
10.5051/jpis.2016.46.2.96
- Author:
Hun Mu YANG
1
;
Jung Yul CHA
;
Ki Seok HONG
;
Jong Tae PARK
Author Information
1. Department of Anatomy, Dankook University College of Medicine, Cheonan, Korea.
- Publication Type:Original Article
- Keywords:
Finite element analysis;
Malocclusion;
Mastication;
Masticatory muscles
- MeSH:
Bruxism;
Cone-Beam Computed Tomography*;
Dental Implants;
Finite Element Analysis*;
Incisor;
Malocclusion*;
Mandible;
Mastication*;
Masticatory Muscles;
Reproduction;
Skeleton;
Skull;
Stomatognathic System;
Temporomandibular Joint Disorders;
Volunteers
- From:Journal of Periodontal & Implant Science
2016;46(2):96-106
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: Stress distribution and mandible distortion during lateral movements are known to be closely linked to bruxism, dental implant placement, and temporomandibular joint disorder. The present study was performed to determine stress distribution and distortion patterns of the mandible during lateral movements in Class I, II, and III relationships. METHODS: Five Korean volunteers (one normal, two Class II, and two Class III occlusion cases) were selected. Finite element (FE) modeling was performed using information from cone-beam computed tomographic (CBCT) scans of the subjects' skulls, scanned images of dental casts, and incisor movement captured by an optical motion-capture system. RESULTS: In the Class I and II cases, maximum stress load occurred at the condyle of the balancing side, but, in the Class III cases, the maximum stress was loaded on the condyle of the working side. Maximum distortion was observed on the menton at the midline in every case, regardless of loading force. The distortion was greatest in Class III cases and smallest in Class II cases. CONCLUSIONS: The stress distribution along and accompanying distortion of a mandible seems to be affected by the anteroposterior position of the mandible. Additionally, 3-D modeling of the craniofacial skeleton using CBCT and an optical laser scanner and reproduction of mandibular movement by way of the optical motion-capture technique used in this study are reliable techniques for investigating the masticatory system.
