生长发育高峰期不同矢状骨面型高角患者颞下颌关节形态的CBCT研究OA

Objective To investigate the morphological characteristics of the temporomandibular joint(TMJ)in high-angle patients with different sagittal skeletal patterns during the peak growth period and to analyze the gender differences,so as to provide a theoretical basis for clinical orthodontic diagnosis and treatment.Methods Sixty high-angle patients at the peak growth period were enrolled and divided into three groups according to sagittal skeletal patterns:skeletal Class Ⅰ,Class Ⅱ,and Class Ⅲ,with 20 cases in each group.Cone-beam computed tomography(CBCT)was used to measure the morphological parameters of the glenoid fossa,condyle and joint spaces.One-way ANOVA and independent sample t-test were performed for statistical analysis.Results There were significant differences in glenoid fossa depth,posterior slope angle of articular eminence,condylar anteroposterior diameter,condylar height,condylar inclination angle,anterior joint space and posterior joint space among different sagittal skeletal patterns(P<0.05).Glenoid fossa depth,condylar anteroposterior diameter and condylar height were ranked as skeletal Class Ⅲ>Class Ⅰ>Class Ⅱ.Posterior slope angle of articular eminence was Class Ⅰ>Class Ⅱ>Class Ⅲ.Condylar inclination angle,anterior and posterior joint spaces were Class Ⅱ>Class Ⅰ>Class Ⅲ.Gender comparison showed that only the condylar mediolateral diameter was significantly larger in males than in females(P<0.05),while no significant differences were found in other TMJ parameters between genders(P>0.05).Conclusion TMJ morphology in high-angle patients during the peak growth period is significantly affected by sagittal skeletal patterns but slightly affected by gender.Attention should be paid to the differences in condylar morphology and joint spaces in patients with different sagittal skeletal patterns during orthodontic treatment.