Jackson骶骨棒内固定技术与腰骶部常用内固定系统的生物力学比较性研究

目的 :评估Jackson技术与几种腰骶部常用内固定系统的生物力学性能 ,为Jackson技术的临床应用提供生物力学依据。方法 :15具小牛新鲜脊柱标本 (L4 到骶尾部全部脊椎 )和 5具人体新鲜脊柱标本 (L3到骶尾部全部脊椎 )分成骨密度相似的 5组 ,分别用Dick ,RF ,Steffee ,CD和Jackson等技术进行腰骶部固定 ,并测量它们的生物力学特征。结果 :Jackson技术固定组比其它组更坚固和具有更好的稳定性 ,在前屈、后伸、侧弯及抗扭转时的载荷 应变 位移曲线上明显优于其它组 (P <0 .0 1)。结论 :Jackson技术是一种有效的腰骶部内固定技术

Biomechanical comparative study of lumbosacral fixation and Jackson intrasacral fixation

Objective To assess the biomechanical properties of Jackson intrasacral fixation technique and other lumbersacral internal fixation systems, and to provide the basis of biomechanics for the clinical application of Jackson technique. Methods The biomechanical properties of Dick, RF, Steffee, CD, and Jackson technique were studied by testing the inflexion, extension, compression, torsion, and lateral bending in 15 calf fresh frozen specimens and 5 fresh frozen human cadavaric specimens, which were divided into 5 groups with similar bone density. Results Jackson intrasacral fixation device was stiffer than any other devices. On the "load displacement" curve, Jackson intrasacral fixation device was predominant compared with other devices (P<0.01). Conclusion Jackson intrasacral fixation system is an effective device for lumbosacral fixation.