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目的探讨颞下颌关节盘前移与颞下颌关节紊乱综合征(TMJDS)的相互关系。方法将60例单侧(60个颞下颌关节)TMJID患者纳入病例组,30名双侧(60个颞下颌关节)正常者纳入对照组;使用Siemens 3.0 T MR扫描仪头颅线圈,采用自旋回波T1WI、T2WI技术对颞下颌关节进行斜矢状闭口位、开口位扫描;测量闭口位关节盘前移角度和最大被动开口大小;分析两组间两项数据的相关性;比较两组间的差异,并进行统计学检验。结果病例组闭口位关节盘前移角度与最大被动开口大小存在负相关(r=0.680,P<0.05)。对照组闭口位关节盘前移角度与最大被动开口大小无明显相关性(r=0.306,P>0.05)。闭口位关节盘前移角度,病例组[(33.43±13.52)°]明显>对照组[(7.88±1.77)°];差异有统计学意义(t=6.235,P<0.05)。最大被动开口大小,病例组[(2.73±0.34)cm]小于对照组[(3.22±0.19)cm],差异有统计学意义(t=-4.24,P<0.05)。结论关节盘移位与TMJDS密切相关,通过MRI可清晰显示并可测定颞下颌关节盘前移的角度。
Objective To investigate the relationship between temporomandibular joint disc advancement and temporomandibular joint disorder syndrome (TMJDS). Methods Sixty TMJID patients with one side (60 temporomandibular joints) were enrolled in the case group. Thirty (60 temporomandibular joint) normal subjects were included in the control group. Using the Siemens 3.0 T MR scanner cranial coil, T1WI and T2WI were used to scan the temporomandibular joint oblique sagittal and open positions. The angle of advancement and the maximum passive opening were measured. The correlation between the two data was analyzed. The differences between the two groups were compared , And statistical tests. Results There was a negative correlation between the angle of advance of the anterior facet joint disc and the size of the largest passive opening (r = 0.680, P <0.05). In the control group, there was no significant correlation between the angle of advancement of the closed joint disc and the size of the largest passive opening (r = 0.306, P> 0.05). (33.43 ± 13.52) °] was significantly higher in the case group than that in the control group [(7.88 ± 1.77) °]. The difference was statistically significant (t = 6.235, P <0.05). The maximal passive opening size was smaller in the case group (2.73 ± 0.34 cm) than in the control group (3.22 ± 0.19 cm) (t = -4.24, P <0.05). Conclusion Displacement of the articular disc is closely related to TMJDS. MRI can clearly show the displacement of temporomandibular joint disc.