标题：Acutrak无头加压螺钉与AO空心拉力螺钉应用于LetenneurⅠ型Hoffa骨折的生物力学比较

      作者：朱履刚，常 祺，任洪峰，陈国立，黄昌林
    （中国人民解放军第150中心医院创伤骨科，河南 洛阳 471031）

      卷次： 2015年26卷7期

      【摘要】 目的 分析Acutrak无头加压螺钉与AO空心拉力螺钉应用于LetenneurⅠ型Hoffa骨折的生物力
学差异。方法 选取16根新鲜冷冻成人尸体股骨标本，制备成LetenneurⅠ型Hoffa骨折模型。随机分为Acutrak
无头加压螺钉固定的观察组(n=8)、AO空心拉力螺钉固定的对照组(n=8)，比较两组骨折间压力及轴向压缩位
移、循环负荷位移及极限负荷值。结果 (1)观察组模型采用Acutrak无头加压螺钉固定后的骨折块间固定压
力大于对照组、骨折块间轴向移动距离小于对照组(P<0.05)；(2)观察组模型采用Acutrak无头加压螺钉固定
后的各个循环负荷周期位移均明显小于对照组(P<0.05)；(3)观察组模型极限负荷值明显大于对照组模型
(P<0.05)。结论 Acutrak无头加压螺钉固定LetenneurⅠ型Hoffa骨折的强度与稳定性优于AO空心拉力螺钉，
更有利于骨折的早期愈合及肢体功能恢复。

      【关键词】 Hoffa骨折；Acutrak无头加压螺钉；AO空心拉力螺钉

      【中图分类号】 R683 【文献标识码】 A 【文章编号】 1003—6350（2015）07—0973—03


Biomechanical comparison of Acutrak headless compression screw and AO cannulated lag screw for Letenneur
typeⅠ Hoffa fracture.
ZHU Lv-gang, CHANG Qi, REN Hong-feng, CHEN Guo-li, HUANG Chang-lin. Department of
Orthopaedics, the 150th Central Hospital of Chinese PLA, Luoyang 471031, Henan, CHINA

【Abstract】 Objective To analyze biomechanical comparison of Acutrak headless compression screw and
AO cannulated lag screw for Letenneur type Ⅰ Hoffa fracture. Methods Sixteen root fresh frozen adult corpses
femurs were selected and prepared into Letenneur Ⅰ Hoffa fracture model, which were then randomly divided into
observation group with Acutrak headless compression screw (n=8) and control group with AO cannulated lag screw
(n=8). Fracture pressure and axial compressive displacement, cyclic load limit load and displacement value were com-
pared between the two groups. Results (1) The fixed pressure in the observation group was greater than that in the
control group, and axial moving distance between blocks was less than that in the control group (P<0.05). (2) The
load cycle displacement of every cycle in the observation group was significantly less than that in the control group
(P<0.05). (3) The limit load value in the observation group was significantly greater than that in the control group
(P<0.05). Conclusion Acutrak headless compression screw for fixing Letenneur Ⅰ Hoffa fracture type is better
than AO cannulated lag screw in strength and stability, which is more conducive to early healing of fracture and recov-
ery of limb function.