【摘要】 目的:研究不同垂直骨面型骨性Ⅲ类患者颞下颌关节的形态特征。方法:纳入46名成人骨性Ⅲ类错牙合畸形患者,根据下颌平面角分为高角组、均角组和低角组,进行锥形束CT扫描,通过三维分析软件Invivo 5对颞下颌关节进行三维重建,测量髁突位置、髁突形态和关节间隙等9项指标,并进行统计学分析。结果:骨性Ⅲ类患者双侧颞下颌关节三维形态结构测量值之间差异无统计学意义(P>0.05);与高角和均角组患者相比,低角组患者关节上间隙更大,关节结节后斜面更陡峭,髁突长轴径更大,关节内间隙更大;与均角和低角组相比,高角组髁突前后径更小。结论:不同垂直骨面型骨性Ⅲ类患者髁突在关节窝中的位置、髁突形态上有一定差异,应在临床诊断和治疗过程中进行关注。更多还原

【Abstract】 Objective: To investigate three-dimensional morphological features of temporomandibular joint in skeletal malocclusion Class Ⅲ with different vertical skeletal facial types.Methods: A total of 46 adults with skeletal malocclusion Class Ⅲ were enrolled and allocated into a normal-angle, a high-angle and a low-angle groups. All patients were undergone cone beam computed tomography(CBCT). Images of temporomandibular joint were reconstructed and analyzed by Invivo 5. Nine measurements relevant to the positions and forms of condyle as well as joint spaces were performed.Results: Significant differences were not observed between the 2 sides of each group among skeletal malocclusion Class Ⅲ(P>0.05). Compared with the high-angle and normal-angle patients, the low-angle patients had larger superior spaces, bigger gradients of the articular tublecle, longer condyle, and larger internal spaces between the condyle and the fossa. Compared with the lowangle and normal-angle patients, the high-angle patients had smaller condylar antero-posterior diameters.Conclusion: Class Ⅲ malocclusion patients with different vertical skeletal patterns have different positions and forms of condyles, which should be paid attention to in clinic.更多还原