全景片与锥形束CT对诊断AngleⅡ~2错牙合畸形颞下颌关节改变的研究

目的比较全景片和锥形束CT(CBCT)对AngleⅡ~2错牙合畸形患者的髁突骨质改变检测的准确性,为临床合理运用X线片进行诊断提供依据。方法 60例AngleⅡ~2错牙合畸形患者根据临床检查分为有症状组(A组)和无症状组(B组),分别对双侧颞下颌关节进行全景片和CBCT检查,对髁突骨质改变进行检测,并对二者差异进行统计学分析。结果 CBCT对髁突骨质改变的诊断一致性较高,全景片一致性诊断存在一定差异;以CBCT对髁突骨质改变的检测结果为金标准,该两组与CBCT检测结果比较,A组全景片正确诊断率为66.7%,B组全景片正确诊断率为85.7%。结论全景片在筛选AngleⅡ~2错牙合畸形患者TMD的临床诊断中具有一定的应用价值,但其灵敏度低于CBCT。

Comparison of cone-beam computed tomography and panoramic radiography in the diagnosis of morphological changes of temporalmandibular joints in adult patients with AngleⅡ2 malformations

Objective To compare the panoramic radiography with cone-beam computed tomography( CBCT) in diagnostic accuracy of morphological changes of temporal-mandibular joints( TMJ) in adult patients with AngleⅡ2 malformations. Methods 60 cases of AngleⅡ2 malformations were divided into two groups:A. the asymptomatic group and B. the symptomatic group. Bilateral TMJs were examined by panoramic radiography and CBCT, and morphological changes of the condyles were detected. Data were statistically ana-lyzed. Results CBCT was better than panoramic radiography in the consistency of diagnosis. Taking CBCT test as the gold standard, the diagnostic accuracy of panoramic radiography was 66. 7% in group A and 85. 7% in group B. Conclusion Panoramic radiography can be applied in the diagnosis of morphological changes of TMJs in adult patients with AngleⅡ2 malformations, but its sensitivity is lower than CBCT.