关键词:跖跗关节;内固定;生物力学
摘要 通过用9只新鲜人体脚制作成分歧型脱位标本模型。解剖复位后分别采用钢丝环扎、二根克氏针、四根交叉克氏针和松质骨螺钉共四种方法做内固定并进行生物力学测验,发现各种内固定方法必须使第一、二、三跖跗关节组成一个整体,使中足成为坚固的弓形结构,可防止足弓塌陷和畸形。应用克氏针或松质骨螺钉内固定时,必须在第一跖跗关节稳定的基础上,经第一、二跖骨基底和第三楔骨交叉穿一克氏针或螺钉,使第二跖骨基底得两点固定。第一、二、三、四跖骨基底的横向骨间韧带牵拉,可阻止其向外侧移位。跖跗关节的外侧柱用一根或二枚克氏针或螺钉即可起到固定作用。骨折脱位的内侧柱必须用二枚克氏针或螺钉固定。
A Comparative BiomechanicalStudy of Four Internal Fixations to F racture and Dislocation of Tarsometatarsal Joint
Wu Wenchen,Ma Yuanzheng,Shen Jingen.
Department of Orthopaedic s. The Affiliated Hospital of Chang Zhi Medical College,ChangZhi 046000
Abstract The article reported the results of biomechani cal study intreatment of fractures and dislocation of tarsometatarsal joint.T h e model of divergenttype was made from nine fresh-frozen human feet.After anat omic reducation each specimentwas randomly fixed with one of four methods(two c rossed Kirschner pins ......
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