下颌能做以髁状突为定点的转动。
目的：推导切牙合功能时，髁状突向前下方运行的距离及生理意义。
Objective: How distant the condyle moved to protrusive and its function importance for incisors occlusion.
结论：对于有移位的髁状突骨折应积极手术治疗。
Conclusions: The cases with displacement of condylar fracture should be treated surgically.
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