Gamma钉与InterTan髓内钉固定治疗股骨转子间骨折的生物力学性能比较

被引：9

作者：

匡明杰 ^{[1
]}

马剑雄 ^{[2
]}

董强 ^{[2
]}

孙磊 ^{[2
]}

卢斌 ^{[2
]}

王颖 ^{[2
]}

赵杰 ^{[2
]}

付林 ^{[2
]}

何伟伟 ^{[2
]}

马信龙 ^{[1
]}

机构：

[1] 天津医科大学总医院

[2] 天津医院骨科研究所

来源：

中华创伤骨科杂志 | 2017年 / 19卷 / 08期

关键词：

髋骨折; 骨折固定术; 髓内; 骨钉; 生物力学;

D O I：

暂无

中图分类号：

R687.3 [骨骼手术];

学科分类号：

1002 ; 100210 ;

摘要：

目的比较第3代Gamma钉与InterTan髓内钉固定治疗股骨转子间骨折的生物力学性能。方法选用12根第4代人工合成模型骨,随机分为A、B、C、D 4组(n=3)。A、B组制作稳定型股骨转子间骨折(AO分型为31-A1.1型)模型,C、D组制作不稳定型股骨转子间骨折(AO分型为31-A2.3型)模型,分别用Gamma钉(A、C组)和InterTan髓内钉(B、D组)固定并进行生物力学测试。结果对于稳定型股骨转子间骨折模型:随着轴向压力逐级增加,头下沉位移呈增大趋势;随着扭转角度的逐渐增大,扭矩也呈逐渐增大趋势,A组与B组的头下沉位移、扭矩比较差异均有统计学意义(P<0.05)。A组与B组的最大破坏载荷平均分别为(5 855.5±627.8)、(5 547.1±365.4)N,差异无统计学意义(P>0.05)。对于不稳定型股骨转子间骨折:当轴向载荷为500、600、700 N时,C组与D组的头下沉位移比较差异均无统计学意义(P>0.05);而当轴向载荷大于800 N时,C组与D组的头下沉位移比较差异有统计学意义(P<0.05)。随着扭转角度的逐渐增大,C组与D组的扭矩也呈增大趋势,同一扭转角度下两组之间扭矩比较差异均有统计学意义(P<0.05)。C组与D组的最大破坏载荷平均分别为(2 781.5±600.6)、(3150.5±633.8)N,差异有统计学意义(P<0.05)。结论对于稳定型股骨转子间骨折模型,InterTan髓内钉和Gamma钉的生物力学性能相差不大;在不稳定型股骨转子间骨折模型中,InterrTan髓内钉的生物力学稳定性明显优于Gamma钉。

引用

页码：708 / 713

页数：6

共 23 条

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