Changes of osseous structure about temporal-mandibular joint pre/post-treatment for Angle III malocclusion through cone-beam computed tomography

doi:10.3969/j.issn.2095-4344.1465

Abstract

Abstract:

BACKGROUND: The changes of temporal-mandibular join before and after compensatory correction about Angle class III malocclusion are rarely reported.
OBJECTIVE: To investigate the changes of osseous structure about temporal-mandibular joint pre/post-treatment for Angle III malocclusion through cone-beam CT (CBCT).
METHODS: The study was in accordance with the ethical requirements of School of Stomatology of Tianjin Medical University. Thirty eligible Han patients with Angle class III malocclusion were enrolled, with the age of (16.5±2.6) years. All patients and their guardians signed the informed consents. The patients were treated by fixed appliance and class III traction and rocking-chair archwire. CBCT was conducted before and after treatment. CBCT data were measured and analyzed with the reconstructing image for comparing the glenoid morphology, condylar morphology, condylar axial and condylar growth.
RESULTS AND CONCLUSION: (1) The joint nodules angle, condylar sagittal angle, articular fossa depth and condylar macroaxis angle were increased, the upper part of condyle was reduced and condylar process moved rearwards in patients with Angle III malocclusion after treatment (P < 0.05). (2) The difference of condylar minor axis and condylar inclination angle on coronal plane had no significant difference (P > 0.05), but condylar minor axis had increased tendency and condylar inclination angle on axial surface had decreased tendency. (3) To conclude, the morphology of temporal-mandibular joint in patients with class III malocclusion Angle pre/post-treatment is different to some extent.

Key words: CBCT, cone-beam CT, Angel class III maloclussion, temporal-mandibular joint, compensatory correction

CLC Number:

Wang Chaoran, Li Zhiqin, Shi Peiliang, Feng Chunyue, Yin Ye. Changes of osseous structure about temporal-mandibular joint pre/post-treatment for Angle III malocclusion through cone-beam computed tomography[J]. Chinese Journal of Tissue Engineering Research, 2019, 23(31): 4950-4955.

Figures/Tables 3

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