改进型腰骶椎前路安全钢板的研制及生物力学测试.DOCVIP

改进型腰骶椎前路钢板的研制及生物力学测试 艾建国1 初同伟 周跃1 陈卫军2 （1第三军医大学附属新桥医院骨科，重庆 400037；2第三军医大学解剖教研室、重庆市生物力学重点实验室，重庆 400038） 摘　要　目的 通过对国人腰骶椎解剖结构数值的统计分析，设计一种新型腰骶椎前路钢板，进行生物力学测试。方法 对约350例正常成人腰骶椎正位侧位X线片腰骶角、腰5骶1椎体及椎间盘高度测量，得出正常国人腰骶椎结构的大致数值范围，再依据此数值设计出改进型腰骶椎前路安全钢板各项参数指标，并将钢板样品在4 种不同生理运动状况下进行脊柱标本的生物力学数据测试。 结果 腰骶角角度范围为125°～135°，腰5椎体前缘高度27.06±2.30mm，骶1椎体前缘高度22.3±2.8mm，腰5骶1椎间盘高度8.2±0.3mm。钢板固定后的屈曲位移及压缩刚度比相同条件下PACH固定后有显著差异，具有统计学意义（P0.05）。结论 研制的改进型腰骶椎前路钢板不仅在形态上完全适应国人腰骶椎解剖结构，且具有良好的生物力学稳定性能，适合腰骶椎前路脊柱重建的需要。 关键词　腰骶椎；内固定；生物力学 Development and Biomechanical Test of Modified Lumbosacral Anterior Plate AI Jian-guo1，CHU Tong-wei1， ZHOU Yue1，Chen Wei-jun2 (1Department of Orthopaedics，Chongqing Xinqiao Hospital，the Third Military Medical University，Chongqing，400037，China；2 Department of Anatomy , Third Military Medical University，The Key Laboratory of Biomechanics Under the Educational Committee in Chongqing，Chongqing，400038，China) 【Abstract】　Objective To design a new lumbosacral anterior plate by statistical analysis for the numerical value of the anatomic structure in Chinese. Methods Measured the numerical value of lumbosacral angle and height of lumbosacral vertebrae and discus intervertebralis for 350 orthotropia and lateral view X-ray pictures of Lumbosacral vertebrae of adult normal, acquired the amplitude of lumbosacral vertebrae in Chinese, designed the modified lumbosacral anterior plate, and tested the plate in four different states of working condition of spinal column to assay biomechanical data. Results The amplitude of lumbosacral angle wre 125°～135°, the heights of anterior border L5 and S1 vertebrae were 27.06±2.30mm and 22.3±2.8mm, the height of L5S1 discus intervertebralis was 8.2±0.3mm. For the vertebral column fixed the modified plate and PACH respectively, the flex bias and the compression rigidity had significant deviation, the result possessed statistical significance（P0.05）. Conclusion The modified lumbosacral anterior plate system accommodate the anatomic structure of lumbo