摘要
目的：验证自动加压带锁髓内钉（ＡＬＮ）的生物力学性能比ＧＫ钉治疗股骨干骨折的优越性，为临床提供可靠的科学依据。方法：采用９具成人新鲜尸股骨标本，对其骨折固定后，在压缩、弯曲、扭转的生物力学性能进行电测实验应力分析。结果：①ＡＬＮ钉与国外ＧＫ钉在强度、刚度和稳定性方面相当（Ｐ＜０．０５）；②在应力遮挡率方面特别小，明显比ＧＫ钉优越（Ｐ＜０．０１）；③ＡＬＮ钉具有力学分布合理、应力遮挡小、内固定稳定可靠，手术操作方便，能早期恢复伤肢功能的特点。结论：ＡＬＮ钉除了具备ＧＫ钉抗弯、剪、扭、旋优良的作用外，还具备了ＧＫ钉所不具备的自动加压弹性固定的作用。解决了临床上坚强内固定（带锁髓内钉）骨折端应力传导不够或没有应力传导，弹性固定（梅花钉）不易控制骨折端弯、剪、扭、旋应力这一矛盾。是一种性能特别优良的内固定器械。
To verify the biomechanic performance of auto-compress locking nail(ALN) in femoral shaft fracture therapy, to provide reliable basis for clinical use. Methods' 9 fresh cadaveric femurs were used,the biomechanic properties of compression,bending and torsion were analysed using electric measuring apparatus after fixation of fracture. Resultst @ALN was similar to GK nail in strength, stiffness and stability(p>0.05); @The stress shielding rate of ALN was significantly smaller than that of GK nail; @ALN had reasonable mechanic distribution, low stress shielding rate and fixation stability, also was easy to operate with rapid rehabilitation. Conclusion: ALN not only have the same properties of anti-bending, anti-shearing,anti-torsion and anti-rotation as GK nails but also have auto-compress elastic fixation. In clinic, rigid fixation(interlocking intramedullary nail) has no enough stress conduction in fracture region, elastic fixation(cloverleaf type intramedullary nail)can not effectively control bending, shearing, torsion and rotation stress in fracture region, ALN have successfully resolved the contradiction. It is one kind of new interfixation instrument with good performance.
出处
《医用生物力学》
CAS
CSCD
2000年第1期49-54,共6页
Journal of Medical Biomechanics
关键词
带锁髓内钉
股骨干骨折
生物力学
ALN
auto-compress locking nail
fracture of femoral shaft
biomechanics
