近侧趾间关节移植重建近侧指间关节内固定方法的生物力学研究

目的比较近侧趾间关节移植重建近侧指间关节4种内固定的生物力学性能，为临床选择内固定提供依据。方法取48对指、趾尸体标本，随机分成4组，分别用交叉克氏针、十字钢丝加单枚斜形克氏针、微型钢板背侧和微型钢板侧方固定，制成近侧趾间关节移植重建近侧指间关节标本，测量模拟活动后内固定的生物力学性能。结果微型钢板背侧固定和十字钢丝加单枚克氏针斜形固定2种固定方法具有较好的稳定性，微型钢板固定和交叉克氏针固定2种固定方法稳定较差。结论十字钢丝加单枚克氏针斜形固定操作简单、软组织剥离少、有较强的稳定性，是较好的固定方法，适合早期功能锻炼。

Biomechanical Study of Internal Fixation in Reconstructing Proximal Interphalangeal Joint of Finger with Proximal Interphalangeal Joint of Toe

Objective To compare and evaluate the differences of biomechanical characteristics of four internal fixation used in proximal interphalangeal joint reconstruction,for the purpose of proposing the experimental basis for clinical application.MethodsForty-eight paired specimens of fingers and toes obtained from the embalmed adult cadaver were randomizedly divided into four groups.The joints were fixed in each group with crossed K-wires,the cruciate wire combined with the inclining K-wire,the dorsal mini-plate,and the lateral mini-plate.Biomechanical characteristics were observed after mimic proximal interphalangeal joints movement.ResultsThe dorsal mini-plate and cruciate wires combined with the inclining K-wire provided more sufficient stability while the lateral mini-plate and crossed K-wires provided poor stability.ConclusionThe cruciate wire combined with the inclining K-wire is an optimal internal fixation method.It avoids undesirable soft tissue dissection and complicated manipulation,provides sufficient stability and is suitable for early rehabilitation.