摘要
目的对锁定钢板内固定联合磷酸钙骨水泥（CPC）治疗老年性股骨转子间不稳定性骨折进行基础力学研究。方法证实无病理缺陷、骨折、畸形或肿瘤的18具新鲜股骨标本，分为两组：实验组（右侧股骨）与对照组（左侧股骨），依据Evans分型中的ⅢA型股骨转子间骨折造模，每组各18根股骨，实验组采取股骨近端锁定钢板（LPFP）固定联合CPC固定，对照组采用单纯TJPFP固定。将股骨标本固定在特殊的夹具内进行力学对比测试。结果两者载荷-应变在600kg-m·s^-2条件下，实验组（98±3．6）με、对照组（127±4．4）斗8；3000kg·m·s^-2条件下，实验组（278±23）斗8、对照组（457±45）με。载荷．位移500kg·m·s^-2条件下，实验组（0．16±0．02）mm、对照组（0．23±0．04）mm；4000kg·m·s^-2条件下，实验组（2．79±0．59）mm、对照组（5．05±0．68）mm。扭矩一扭转变形0．1（°／em）条件下，实验组（0．14±0．01）kg·m^2·s^-2、对照组（0．23-t-O．04）kg·m^2。·s～；0．8（°／em）条件下，实验组（3．14±0．17）kg·m·s^2、对照组（2．57±0．08）kg·m^2·s^-2（P〈0．05）。结论治疗不稳定性转子间骨折锁定钢板内固定联合磷酸钙骨水泥在抗压、抗扭转方面明显优于单纯锁定钢板内固定。其立体固定，整体稳定性高。
Objective To examine the basic biomechanics of locking plate fixation plus calcium phosphate bone cement （CPC） for unstable intertrochanteric fractures. Methods A total of 18 Chinese fresh femur specimens without pathological defects, fractures, malformations or neoplasms were collected. In accordance with the Evans classification of Ⅲ A type, the intertrochanteric fracture model was established. There were 18 femoral samples in each group. The experimental group received locking plate （LPFP） fixation plus CPC while the control group had a simple LPFP fixation. The mechanical tests were performed. Results Under different load-strain conditions, the results were as follows：600 kg · m · s-2 experimental group 98 ＋3.6 vs control group 127 ＋4.4 με; 3000 kg · m· s-2 experimental group 278 ＋23 vs control group 457 ±45με . And under different load-displacement conditions, 500 kg · m · s-2 experimental group 0. 16 ±0.02 vs control group 0. 23 ±0. 04 mm; 4000 kg · m · s-2 experimental group 2.79 ± 0. 59 vs control group 5.05± 0. 68 mm. The torsional mechanical 0. 1 （°/cm） properties ： experimental group 0. 14 ± 0. 01 vs control group 0. 23 ±0. 04 （ kg · m · s-2 . m） ; 0. 8 （°/cm） experimental group 3. 14 ± 0. 17 vs control group 2. 57 （ kg · m· s -2 . m） ＋ 0. 08 （ kg · m· s - 2 . m） （ P 〈0. 05）. Conclusion The combined regimen of locking plate fixation and calcium phosphate cement offers remarkable advantages over simple locking plate fixation in its excellent anti-compression and anti-torsion performances in the treatment of unstable intertrochanteric fractures. With a reasonable design, it has a greater stability.
出处
《中华医学杂志》
CAS
CSCD
北大核心
2011年第47期3324-3328,共5页
National Medical Journal of China
关键词
股骨骨折
内固定器
生物力学
Femoral fractures
Internal fixators
Biomechanics
