摘要
目的 探讨采用膨胀式带锁加压钉治疗股骨颈骨折的生物力学性能 ,为临床应用提供科学依据。方法 采集 8具新鲜成人尸体股骨标本 ,造成股骨颈骨折后 ,分别以膨胀式带锁加压钉(HZS)、单枚双头加压螺钉 (OCS)、双头加压子母螺钉 (TCS)和三枚空心加压螺钉 (TECS)在解剖复位后作内固定。通过生物力学测试 ,对四种内固定器的生物力学性能作比较分析。结果 采用HZS固定股骨颈骨折 ,不仅使股骨颈在抗压、抗弯、抗剪和抗扭等生物力学性能上特别优越 ,而且使骨折断端嵌插紧密 ,有利于骨折愈合。结论 膨胀式带锁加压钉内固定不但符合生物力学原理 ,而且比其它内固定更优越 ,是一种理想的新型内固定器械。
Objective To determine the mechanical properties of the interlocking expanding compressive screw(HZS) to treat the femoral neck fracture and present the scientific data for its further clinical uses. Methods The models of femoral neck fracture were made in 8 cases of the fresh cadaveric human femurs. The fractures were reduced anatomically and fixed with the interlocking expanding compressive screw, dynamic compressive screw, twin compressive screw and three cannulated screws individually. Then the specimen were tested on the material machine. Results The models of HZS were strongest of all for against the compression, flexion, shearing and torsional force. The HZS has the good impact effect between the two fracture segments which could accelerate the bone healing. Conclusion The interlocking expanding compressive screw is a new kind of optimal fixator for the femoral neck fracture due to its superior mechanical properties to any other ones.
出处
《医用生物力学》
EI
CAS
CSCD
2002年第2期99-104,共6页
Journal of Medical Biomechanics
关键词
膨胀式带锁加压钉
股骨颈骨折
生物力学
内固定
Femoral neck fracture
Interlocking expanding compressive screw
Internal fixation
Biomechanics
