下颌髁状突移位至颅中窝十分罕见,但有下列表现应高度怀疑:①颏部严重创伤;②下颌运动障碍,既不能开口又不能闭合;③颏部偏患侧,患侧有(牙合)接触而对侧开(牙合);④患侧耳道脑脊液漏;⑤X线示髁状突嵌入颅中窝。导致该损伤的可能因素有关节窝后斜面骨质薄弱、髁状突细小、乳突气房增多、后牙缺失及受伤时 Mandibular condyle shift to the skull midline fossa is very rare, but the following should be highly suspected: ① chin severe trauma; ② mandibular dyskinesia, neither open nor closed; ③ chin partial side, the ipsilateral ( Occlusal) contact and contralateral (occlusion); ④ ipsilateral ear canal cerebrospinal fluid leakage; ⑤ X-ray showed condyle embedded in the cranial fossa. The possible causes of the injury related to the fossa inferior posterior fossa bone weakness, small condyle, increased mastoid atrium, missing and injured posterior teeth