这个病例关节盘前移位较重，张闭口时有弹响。
This case has more advanced anterior disc displacement with clicking sounds in opening and closing.
盘前移位组与盘正常组的髁突位置差异无显著性。
No significant difference between disc shift group and disc normal group was found.
另外，一些研究者展开了针对关节盘前移位的生物力学研究。
Besides, some biomechanical researches on anterior disk displacement were done.
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