nd may occur in a delayed fashion if the radial head is not promptly reduced 屈曲型?多见于成人。肘关节微屈曲,前臂旋前位掌心触地,作用力先造成尺骨较高平面横型或短斜型骨折,桡骨头向后外方脱位,骨折断端向背侧,桡侧成角。Type II (flexion type) - 15% - posterior or posterolateral dislocation of radial head (or frx); - frx of proximal ulnar diaphysis with posterior angulation; - posterior Monteggia frx is reduced by applying traction to forearm w/ the forearm in full extension; - immobilization is continued until there is union of the ulna; - this ordinarily requires 6-10 wks depending on the age of pt;内收型?多发生幼儿。肘关节伸直,前臂旋前位,上肢略内收位向前跌倒,暴力自肘内方推向外方,造成尺骨喙突处横断或纵行劈裂骨折,移位较少,而桡骨头向外侧脱位。Type III - 20% - lateral or anterolateral dislocation of the radial head; - fracture of ulnar metaphysis; - frx of ulna just distal to coronoid process w/ lateral dislocation of radial head
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