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目的:分析比较自然病程中青少年颞下颌关节不可复性前移位的影像学转归。方法 :选择2010年1月—2013年6月于我院关节专科随访的单侧颞下颌关节盘不可复性前移位的124例青少年患者。通过MRI检查评价健、患侧髁突骨质退变、关节盘变形和积液的发生率,比较其病程进展。采用SAS 9.13软件包对数据进行统计学分析。结果:初诊时,患侧髁突骨质退变和积液的检出率显著高于健侧(P<0.05)。对随访前、后进行比较,发现患侧关节盘变形的检出率显著升高(P<0.05),而患侧积液的检出率显著降低(P<0.05),患侧髁突骨质退变率由60.48%上升为69.36%,但无显著差异(P=0.14)。结论:青少年颞下颌关节盘不可复性前移位与髁突骨质退变和关节腔积液显著相关。随着病程延续,其关节盘变形发生率显著升高,关节液显著减少。
OBJECTIVE: To analyze and compare the imaging outcomes of the premature transposition of the temporomandibular joint in adolescent patients with natural history. Methods: One hundred and twenty-four adolescent patients with unilateral premolar temporomandibular joint disc were retrospectively reviewed from January 2010 to June 2013 in our hospital. Through the MRI examination to assess the health, ipsilateral condyle bone degeneration, disc deformation and effusion, the incidence of progression compared. SAS 9.13 software package for statistical analysis of the data. Results: At initial diagnosis, the detection rate of condylar bone degeneration and effusion was significantly higher than that of healthy contralateral (P <0.05). Before and after follow-up, the detection rate of ipsilateral disc deformation was significantly increased (P <0.05), but the detection rate of ipsilateral effusion was significantly decreased (P <0.05) Degeneration rate increased from 60.48% to 69.36%, but no significant difference (P = 0.14). Conclusion: The adduction of temporomandibular joint disc can not be refolded before adolescent condylar osteogenesis degeneration and joint effusion were significantly correlated. With the continuation of the course, the incidence of disc deformation was significantly increased, significantly reduced synovial fluid.