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,并进行生物力学测试。方法对350例正常成人腰骶椎正位侧位X线片腰骶角、L5S1椎体及椎间盘高度进行测量,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°,L5椎体前缘高度(27.06±2.30)mm,S1椎体前缘高度(22.3±2.8)mm,L5S1椎间盘高度(8.2±0.3)mm。改进型钢板固定后的屈曲位移[前屈(4.706±0.012)mm、后伸(4.549±0.298)mm、侧屈(5.412±0.384)mm]及压缩刚度[400 N下刚度(105.8±7.6)N/mm]比相同条件下PACH固定后[前屈(5.241±0.113)mm、后伸(5.662±0.246)mm、侧屈(6.767±0.017)mm、400 N下刚度(87.4±4.2)N/mm]差异具有统计学意义(P<0.05)。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。
Objective To design a new lumbosacral anterior plate by statistical analysis for the numerical value of the anatomic structure in Chinese.Methods The numerical value of lumbosacral angle and height of lumbosacral vertebrae,and discus intervertebralis were measured in 350 orthotropia and lateral view X-ray pictures of lumbosacral vertebrae of adult normal individuals.According to the acquired amplitude of lumbosacral vertebrae in Chinese,we designed the modified lumbosacral anterior plate,and then tested the plate in 4 different states of working condition on 8 fresh spinal columns to assay biomechanical data,and the results were compared with those of lumbosacral anterior secure plate（PACH）.Results The amplitude of lumbosacral angle were 125 to 135,the heights of anterior border L5 and S1 vertebrae were（27.06±2.30） and（22.3±2.8）mm,the height of L5S1 discus intervertebralis was（8.2±0.3）mm.The flex bias and the compression rigidity had significant deviation for the vertebral column fixed the modified plate [flexation（4.706±0.012）mm,extension（4.549±0.298）mm,lateral bending（5.412±0.384）mm,average value of rigidity in 400 N（105.8±7.6）N/mm] and PACH[flexation（5.241±0.113） mm,extension（5.662±0.246）mm,lateral bending（6.767±0.017）mm,and average value of rigidity（87.4±4.2）N/mm] respectively,with statistical significance among them（P〈0.05）.Conclusion The modified lumbosacral anterior plate system accommodates the anatomic structure of lumbosacral vertebrae in Chinese,possesses conspicuous stability,and is suitable for reconstruction of lumbosacral vertebrae in indicated patients.
出处
《第三军医大学学报》
CAS
CSCD
北大核心
2010年第8期826-829,共4页
Journal of Third Military Medical University
关键词
腰骶椎
内固定
前路
生物力学
lumbosacral vertebrae internal fixation anterior biomechanics
