Mandible deformed and mandibular body bended downwards under the chincup forces; and the larger the forces were,the severer the deformation was.

 
  • 頦兜牽引力使下頜骨順時(shí)針向旋轉的同時(shí)將使下頜骨發(fā)生變形:下頜枝向前彎曲,下頜體向下彎曲,且牽引力越大旋轉、變形越嚴重。
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