Three-dimensional finite element analysis of the stress distribution on the temporomandibular joint after single maxillary extraction orthodontics in adult patients with Class II division 1 malocclusion

doi:10.3969/j.issn.2095-4344.2017.36.005

Abstract

Abstract:

BACKGROUND: Clinical evaluation gives much attention to occlusion and improvement of soft tissue profile, while little is reported concerning the stress distribution on the temporomandibular joint in the treatment of Class II division 1 malocclusion adult patients undergoing single maxillary extraction orthodontics.
OBJECTIVE: To analyze the stress distribution on the temporomandibular joint in the treatment of Class II division 1 malocclusion with single maxillary extraction orthodontics.
METHODS: The three-dimensional finite element models of normal and Class II division 1 malocclusion before and after single maxillary extraction orthodontics according to CT and MRI data. The stress distribution on the temporomandibular joint was analyzed after mechanical loading and boundary constraint.
RESULTS AND CONCLUSION: Compared with Class II division 1 malocclusion, the stress distribution on the temporomandibular joint after single maxillary extraction orthodontics had no significant stress concentration area, and the equivalent stress of the condyle was lower than that before treatment, and the equivalent stress of the articular disc and the glenoid fossa of temporal bone were larger than those before treatment. However, the stress was well-distributed, basically fulfilling the stress characteristics of normal occlusion. To conclude, single maxillary extraction orthodontics reduces the risk of temporomandibular joint disorder in the patients with Class II division 1 malocclusion, which is balanced and stable in line with the goal of orthodontic treatment.

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

Key words: Temporomandibular Joint, Finite Element Analysis, Tissue Engineering

CLC Number:

R318

Lv Ru-ya, Yin Yan-jiao, Liu Hai-xia, Chen Qiu-qiu, Wang Jing. Three-dimensional finite element analysis of the stress distribution on the temporomandibular joint after single maxillary extraction orthodontics in adult patients with Class II division 1 malocclusion[J]. Chinese Journal of Tissue Engineering Research, doi: 10.3969/j.issn.2095-4344.2017.36.005.

Figures/Tables 1

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