Condyle Position and Symmetry in Transverse Discrepancy Patients with Temporomandibular Joint Disorders

Rui WANG; Juan-juan JI; Zhi ZHOU; Shuang YANG; Ya-ling ZHU

doi:10.12259/j.issn.2095-610X.S20210825

Volume 42 Issue 8

Aug. 2021

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Article Navigation > Journal of Kunming Medical University > 2021 > 42(8): 140-147

Rui WANG, Juan-juan JI, Zhi ZHOU, Shuang YANG, Ya-ling ZHU. Condyle Position and Symmetry in Transverse Discrepancy Patients with Temporomandibular Joint Disorders[J]. Journal of Kunming Medical University, 2021, 42(8): 140-147. doi: 10.12259/j.issn.2095-610X.S20210825

Citation:

Rui WANG, Juan-juan JI, Zhi ZHOU, Shuang YANG, Ya-ling ZHU. Condyle Position and Symmetry in Transverse Discrepancy Patients with Temporomandibular Joint Disorders[J]. Journal of Kunming Medical University, 2021, 42(8): 140-147. doi: 10.12259/j.issn.2095-610X.S20210825

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Condyle Position and Symmetry in Transverse Discrepancy Patients with Temporomandibular Joint Disorders

doi: 10.12259/j.issn.2095-610X.S20210825

Dept. of Orthodontic Dentistry，Affiliated hospital of Yunnan University，The 2nd Hospital of Yunnan province，Kunming Yunnan 650021，China

Received Date: 2021-06-11
Available Online: 2021-08-04
Publish Date: 2021-08-04

Abstract

Abstract

Objective To investigate condylar morphology, position and mandibular symmetry in transverse discrepancy patients with temporomandibular joint disorders compared to those with normal occlusion. Methods 18 transverse discrepancy patients with temporomandibular joint disorders and 18 normal occlusion participants were selected .CBCT （Cone Beam CT） was taken before treatment, and the condylar morphology, position and mandibular symmetry of the two groups were compared and analyzed. Results （1） There was no significant difference in the height of bilateral ascending ramus between the experimental group and the control group （P > 0.05）. The difference of mandibular symmetry index between experimental group and control group was statistically significant （P < 0.05）. Mandibular symmetry in control group was better than that in the experimental group （P < 0.05）; （2） There was no significant difference in anterior, superior and posterior joint space between the experimental group and the control group （P > 0.05）. The condylar position on both sides of the control group was correlated （P < 0.05）, while the condylar position on both sides of the test group was not（P > 0.05）.（3）The axial condylar angles on the left side and right side of the experimental group were （25.56 ± 8.69）° and （25.88 ± 10.19）°, respectively, which are significantly higher than those in the control group, and the differences were statistically significant（ P < 0.05）. There was a correlation between the axial condylar angles in the two groups（P < 0.05）. （4） Anteroposterior diameter of condyle in the experimental group was （16.47 ± 2.03） mm on the left side and （16.62 ± 2.16） mm on the right side.The left side of the control group was （17.76 ± 1.93） mm, and the right side was （17.84 ± 2.09） mm, and there was no significant difference between the two groups （P > 0.05）. The medio-lateral diameter of condyle in the experimental group was （7.12 ± 1.3） mm on the left, （6.78 ± 1.47） mm on the right, and that in the control group was （8 ± 0.88） mm on the left, and（7.76 ± 0.92）mm on the right, the difference between the two groups was statistically significant （P < 0.05）. （5） There was no significant difference in the distance between the condylar center and the median sagittal plane between the two sides in both group （P > 0.05）. There was no significant difference between the experimental group and the control group in the anteroposterior orientation of the condylar center on both sides （P > 0.05）. There was no correlation between the condylar and the median sagittal plane distance on both sides in the experimental group （P > 0.05）, but there was correlation between the condylar and the median sagittal plane distance on both sides in the control group （P < 0.05）. Conclusion In the patients with transverse discrepancy and TMD, the mandibular symmetry, disc-process relationship and bilateral condylar position had poor correlation, and the condylar was smaller than the normal occlusal patients. For patients with transverse discrepancy, TMJ should be actively evaluated to reduce the risk of orthodontic treatment.
- Transverse discrepancy,
- Temporomandibular joint disorders,
- Condylar process,
- Symmetry

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References(26)

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