【摘要】 目的:观察腰椎椎弓根在植入螺钉后发生的肉眼骨折和膨胀率的关系。方法:采用人的新鲜的L1-L5标本共计30个,均为男性,年龄21-35岁,平均27.3岁。在植入螺钉前后分别测量椎体椎弓根的横径。结果:共有24个椎弓根发生了肉眼骨折。经统计学分析,螺钉植入后腰椎椎弓根骨折与膨胀率为直线正相关关系;L1,L2和L3的椎弓根骨折无统计学差异。结论:在椎弓根植入螺钉时要考虑椎弓根骨折与膨胀率的关系。在L3植入直径>6mm的螺钉的危险性比想象的要大。更多还原

【Abstract】 Objective To study the relationship between the rate of expansion and fracture in the lumber vertebral arch after the implantation of screw. Methods Thirty lumbers of human spine were used, all of which came from male (the mean age 27. 35 years). The transverse diameters were measured before and after the implantation of screw. Results Twenty-four fractures were observed. The relationship between the rate and fracture was linear positive correlation. The fracture between L1, L2 and L3 showed no difference. Conclusion The relationship must be paid attention when plate screw diameter is 6 mm. It is much more dangerous when the implanted screw is over 6 mm.更多还原