Vathana P, Prasartritha T
Institute of Orthopaedics, Lerdsin General Hospital, Bangkok, Thailand.
J Med Assoc Thai. 1998 Nov;81(11):824-9.
To find out which wiring technique of direct repair of the pars defect is the strongest in resisting anteroposterior translation displacement, fifteen fresh human cadaveric L4-L5 spines were biomechanically tested by a universal testing machine. Two millimeters wide pars defect was created on both sides of L4 vertebrae. Each of the five specimens was wired using Nicol's technique (A), modified Nicol's technique (B) and modified pedicular screw technique respectively (C). At each test, motion was observed to occur initially at the pars defect. The mean minimum tensile strength (increment of the pars defect) for technique A, B and C was 87.64, 82.04 and 110.08 Kg Force respectively. By statistical analysis, technique C was the strongest in resisting anteroposterior displacement of the spinal column. There was no statistically significant difference between technique A and B.
为了找出哪种椎弓根缺损直接修复的布线技术在抵抗前后平移位移方面最强，使用万能试验机对15个新鲜的人类尸体L4-L5脊柱进行了生物力学测试。在L4椎骨两侧制造2毫米宽的椎弓根缺损。五个标本分别采用尼科尔技术（A）、改良尼科尔技术（B）和改良椎弓根螺钉技术（C）进行布线。在每次测试中，最初在椎弓根缺损处观察到运动。技术A、B和C的平均最小拉伸强度（椎弓根缺损的增量）分别为87.64、82.04和110.08千克力。通过统计分析，技术C在抵抗脊柱前后位移方面最强。技术A和B之间没有统计学上的显著差异。
