前置与上置重建钢板固定锁骨中段骨折生物力学性能比较

背景:锁骨中段粉碎性骨折采用切开复位内固定时,其钢板放置方法尚有争议,须经研究证实重建钢板前置与上置的生物力学差异,从而为临床治疗提供有效指导.目的:比较前置与上置重建钢板固定锁骨中段骨折的生物力学性能.方法:采集12具成人新鲜锁骨标本(共24根),致中段锁骨粉碎骨折,分别采用6孔钢板固定并将标本随机分为3组:钢板上置组(n=9):重建钢板经塑形后,固定于锁骨骨折标本上方,保证骨折线两端均有3枚螺钉;钢板前置组(n=9):重建钢板经塑形后,固定于锁骨骨折标本上方,保证骨折线两端均有3枚螺钉;正常标本组(n=6):无任何干预措施.测试各组试件的生物力学特性,并进行比较.结果与结论:三点弯曲强度、扭转强度和刚度测量表明,钢板上置组和钢板前置组与正常标本组相比,差异无显著性意义(P>0.05);而拉伸试验表明,钢板前置组内固定抗拉强度和刚度优于钢板上置组(P<0.05);抗拔力亦明显优于钢板上置组(P<0 05);同时钢板前置组内固定应力遮挡小,明显优于钢板上置组(P<0.05).提示钢板前置是治疗锁骨中段粉碎性骨折的一种可靠治疗方法.

Biomechanical comparison between anterior and upper reconstruction plate internal fixation for middle clavicular fractures

BACKGROUND:It is dispute which placement methods are adaptable when repairing clavicle middle segment comminuted fractures using open reduction and internal fixation,therefore,the biomechanical difference between anterior and upper reconstruction plate internal fixation should be verified,which can provide guidance for clinical treatment.OBJECTIVE:To compare the biomechanical characteristics of upper and anterior reconstruction plate internal fixation for middle clavicular fractures.METHODS:Totally 12 adult...