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KMID : 0355820180390010019
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Korean Journal of Oral Anatomy
2018 Volume.39 No. 1 p.19 ~ p.26
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Morphological analysis of the temporomandibular joint in patients with malocclusion using three-dimensional models
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Ahn Hyun-Na
Jeon Eun-Young
Park Sa-Beom
Lee Jeong-Hyun
Park Jong-Tae
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Abstract
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Studying the morphology of the temporomandibular joint (TMJ) in Class II malocclusion is important for understanding the relevant interrelationship between form and function. The present study was conducted with the aim of understanding malocclusion-induced TMJ variations by measuring and comparing major morphological parameters of the TMJ between Class II malocclusion and normal occlusion. The skull was reconstructed into a 3D model to measure the horizontal condylar angle (HCA), coronal condylar angle (CCA), and coronal condylar width (CCW). As for the differences in TMJ morphology depending on the occlusion type, significant differences were observed in the left and right HCA and CCA, but not in the CCW among males and females. With regard to differences between sexes in the TMJ morphology, there were significant differences between male and female subjects in the normal occlusion group in the left and right CCWs. In contrast, no statistically significant differences between sexes were observed in the HCA or CCA. In the Class II malocclusion group, significant differences were observed between male and female subjects in all morphological parameters of the TMJ. Since the variations in condylar morphology are difficult to discern by visual inspection only, we constructed a 3D model of the condyle using Mimics software. These findings provide a deeper insight into TMJ morphology and imply that the shape of the condyle in Class II malocclusion may lead to arthralgia, TMJ disc perforation, or TMJ dysfunction. The results of this study are expected to serve as fundamental data for utilization in future studies.
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KEYWORD
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3D measurement, malocclusion, TMJ, Mimics
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