Characteristics of condylography during masticatory movement in patients with Class Ⅱ division 1 malocclusion and temporomandibular disorders

doi:10.19439/j.sjos.2022.04.018

Abstract

Abstract: PURPOSE: To investigate the characteristics of condylography of masticatory movement in patients of Class Ⅱ division 1 malocclusion with temporomandibular disorders (TMD), and the effects of TMD and Angle Ⅱ¹malocclusion factors on the condylography of masticatory movement. METHODS: According to the inclusion criteria of the experiment, ten normal occlusion subjects without TMD（nTMD-N）, ten Angle Ⅱ¹ patients without TMD（nTMD-Ⅱ¹）and 14 Angle Ⅱ¹ patients with TMD（TMD-Ⅱ¹）were included. Cadiax IV was used to record the condylography of the subjects during mastication, and the data of condylography was measured and analyzed by GDSW software. The results were analyzed with SPSS 26.0 software package. RESULTS: The characteristics of condylography in nTMD-Ⅱ¹ and TMD-Ⅱ¹ groups were different from those of nTMD-N group. During unilateral mastication on the left or right side, there was no significant difference among nTMD-N group, nTMD-Ⅱ¹ group and TMD-Ⅱ¹ group. During bilateral mastication, the SCI value of nTMD-Ⅱ¹ group was significantly higher than that of nTMD-N group, and the S value of nTMD-N group was significantly higher than that of nTMD-Ⅱ¹ group (P<0.05). CONCLUSIONS: During unilateral masticatory movement, TMD and Angle Ⅱ¹ malocclusion has little effect on the masticatory movement trajectory. Angle Ⅱ¹ malocclusion has influence on bilateral masticatory movement, and the amplitude of condylar movement in patients with ClassⅡdivision 1 malocclusion is smaller than that in normal mastication. TMD has no significant effect on the masticatory movement condylography of the patients.

Key words: Individual normal malocclusion, Angle Class Ⅱ malocclusion, Temporomandibular joint disorder, Masticatory movement, Condylography

CLC Number:

R782.6

ZHANG Chun-xiang, WANG Tian-qi, LIU Dong-qiao, DUAN Xiao-ni, ZHI Chen, WANG Jing, LIN Chen. Characteristics of condylography during masticatory movement in patients with Class Ⅱ division 1 malocclusion and temporomandibular disorders[J]. Shanghai Journal of Stomatology, 2022, 31(4): 429-434.

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