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目的：研究放射性核素骨显像对颞下颌关节紊乱综合征的诊断价值。方法对36例颞下颌关节综合征患者行 SPECT/ CT 骨显像，对颞下颌关节的髁状突、下颌升支、下颌角图像进行冠状面、矢状面、横断面采集重建，并计算放射性计数比值。结果骨显像患侧颞下颌关节髁状突、下颌升支、下颌角放射性计数比值分别为6.23±0.59，3.42±0.14，2.75±0.63，与健侧比较差异均有统计学意义（P <0.05）。结论放射性核素骨扫描对颞下颌关节紊乱病的早期器质性病变是很好的检测手段，可以早期发现骨质的细小破坏，从而为选择治疗方法提供参考。“,”Objective To study the diagnostic value of radionuclide bone imaging on temporo-mandibular joint dysfunction syndrome(TMJD). Methods Conducted SPECT/ CT bone imaging on 36 TMJD patients,gathered and rebuilt coronal plane, vertical plane and transaction of temporal-mandibular joint,mandibular ramus,angle of mandible images,and calculated the ra-dioactive count ratios. Results The radioactive count ratios of bone imaging affected side’s temporal-mandibular joint,mandibu-lar ramus,angle of mandible were 6. 23 ±0. 59,3. 42 ±0. 14 and 2. 75 ±0. 63 respectively,and they had significant difference than those of uninjured side(P <0. 05). Conclusion Radionuclide bone scanning is a good detection method for early temporomandib-ular disorders,so it can early detection of bone damage and provide reference evidence for the choice of treatment method.