单侧有一种症状的TMD患者双侧关节CBCT对比研究

目的：探讨单侧有一种症状的颞下颌关节紊乱病（ TMD）患者双侧颞下颌关节（ TMJ）在CBCT成像上可能存在差异的参考层面。方法：选取仅单侧有症状的TMD患者29例，通过CBCT三维成像和重建，观察两侧TMJ重建后横断面的水平角；平行于髁突长轴的斜位关节间隙、髁突长轴径值、髁突垂直角；垂直于髁突长轴的斜位与矢状位的关节结节斜度、关节窝深度和关节间隙，采用SPSS13．0软件对各测量指标做两样本配对t检验。结果：两侧TMJ在垂直位60°关节间隙时的测量值差异有统计学意义（P＜0．05），其余测量值均无统计学意义（P＞0．05）。结论：对于单侧有一种症状的TMD患者，接近矢状位是较易观察到左右两侧有差异的位置，并可观察到患侧前间隙增大，在此层面重建对诊断和对比研究更有参考价值。

Comparative study on bilateral temporomandibular joint of patients with unilateral single symptom in cone-beam computed tomography

Objective:To investigate bilateral temporomandibular joint of patients with unilateral single symptom in cone?beam computed tomography and research the refrence planes that may be different. Methods:Twenty?nine cases with u?nilateral single symptom were examined by CBCT and the following indexes were observed and analyzed,including horizontal angles of the cross?sectional condyle after the reconstruction,the joint space,the macroaxis diameter of condyle and vertical angles of condyle which were commonly used at oblique position parallelled to the long axis of condyle,the gradient of articu?lar tubercle and the joint space which could be obtained at sagittal and oblique position vertical to the long axis of condyle. The data was analyzed by paired t tests with SPSS 13. 0 software. Results:It was shown that there were significant difference between the bilateral measured value of joint space when the angle was 60° in sagittal plane(P<0. 05),all of the other ones were no significant difference(P>0. 05). Conclusion:To patients of TMD with unilateral single symptom,it is more easily to observe differences between the bilateral measured value of joint space in the sagittal plane,where the increase of the front joint space can be seen and the construction was more significant for the diagnosis of temporomandibular disorders and com?parative study.