后牙缺失者髁突X线影象特征及其影响因素分析

目的 :探讨Schuller位片和侧位体层摄影片显示的髁突X线特征的临床意义。方法 :先对 2 5例颞颌关节紊乱症患者和 88例缺牙修复患者分别拍摄Schuller位片和双侧TMJ侧位体层摄影片 ,然后对 2组患者分别进行临床症状 (缺牙情况及咬合干扰情况 )的检查记录 ,对 2组患者的X线影像进行对称性、骨质变化情况的记录 ,再将 2片所显示的髁突影像情况和临床检查结果之间作相关性分析。结果 :髁突形态不对称比例及骨质变化比例 ,各组之间无明显的差异 (P >0 .0 5 ) ;髁突形态异常者 ,成对缺牙数较多 ,与年龄无明显差异 (P >0 .0 5 ) ;颞颌关节紊乱症症状与咬合紊乱症成正相关关系 (P <0 .0 1)。结论 :TMJ形态及骨质变化与TMD临床症状和体征的关系并不密切 ,后牙缺失后久未修复所导致的各种咬合干扰与TMD有明显的相关关系

The comparative study on TMJ radiographs of patients with posterior teeth-lose with or without TMD

Objectives: To study the clinical meaning of condyle-form asymmetry and its osseous changes shown on TMJ images of lateral oblique transcranial projection and lateral tomography. Methods: 113 patients with partial posterior teeth lose were enroled in the study.Among them 25 were with temporomandibular disorder (TMD group),39 with slight TMD sings (sub-TMD group) and 45 without TMD(TMD-free group). Radiographs were taken and studied for each patient. Results: It was found that the condyle form asymmetry and osseous changes were not significantly different among the three groups. Osseous change was related to the number of teeth-lose (P<0.05) but not to the age and sex of the patients(P>0.05). The symptoms and signs of TMD had close relationship with occlusal interferences. Conclusions: The changes shown on TMJ images do not show close relationship with TMD symptoms and signs. Occlusal interferences resulted from teeth-lose are related to the clinical symptoms and signs of TMD.