天鹅加压接骨器影响骨折愈合记忆生物力学实验研究  

Influence of Swan like Memory-pressure Connector on memory biomechanics of experimental fracture healing

作　　者：左传宏[1] 苏佳灿[2] 王家林[2] 张春才[2] 许硕贵[2] 严望军[2] 张雪松[2] 高堂成[2] 

机构地区：[1]六安市人民医院骨科,安徽省六安市237000 [2]解放军第二军医大学长海医院骨科,上海市200433

出　　处：《中国临床康复》2003年第17期2408-2409,共2页Chinese Journal of Clinical Rehabilitation

基　　金：解放军第二军医大学长海医院258项目(258-5)~~

摘　　要：目的观察天鹅记忆加压接骨器(SMC)对骨折愈合影响,进一步探讨其生物力学意义和记忆生物力学机制。方法25只家犬两侧股骨中段横型截骨,左侧以SMC内固定,右侧以加压接骨板固定,术后1,2,4,8,12周行X线摄片、三点折弯测试观察。结果SMC组内固定后骨折愈合时间明显早于对照组,且愈合过程中未见明显的外骨痂及骨质疏松。骨折后4,8,12周,SMC组截骨处骨皮质厚度和股骨力学强度均高于对照组。SMC组4,8,12周内固定骨折愈合过程中生物力学测试结果分别为(48±13),(79±15),(86±18),与钢板组比较具有差异显著性的意义(P<0.05,t=7.56,P<0.01,t=4.33)。结论SMC内固定可起到有效内固定和持续加压作用,使骨愈合时间缩短,提高了固定段骨的力学强度。Aim To observe the influence of Swan like Memory pressure Connector (SMC) produced by NiTi shape memory alloy on fracture healing and investigate the biomechanics significance and mechanism of memory biomechanics.Methods Twenty five adult dogs were used in this study. Bilateral femurs were osteotomized in the middle and fixed with SMC(group SMC) on the left side,and compression plates(group CP) were plated on the right side.Five animals in each group were sacrificed at 1,2,4,8 and 12 weeks after operation respectively and observed under roentgen rays examination, histomorphologic study and biomechanic test.Results The fracture healed earlier in the SMC group than in the CP group,and external callus and osteoporosis were not observed in the SMC group.The cortex thickness of fracture fragments and mechanics intensity of femur in the SMC group were higher than those in the CP group at 4,8 and 12 weeks after operation respectively.The scores of biomechanics in the SMC group were 48± 13, 79± 15 and 86± 18 respectively at 4,8 and 12 weeks after operation,significantly higher than those in the CP group(32± 7, 55± 25 and 52± 14, P< 0.05,t=7.56, P< 0.01,t=4.33).Conclusion The stability and the continued axial stress are available for the fracture fixation with SMC.These characteristics of SMC are beneficial to enhance fracture healing and improve the mechanical property of the fixed bone. <P>

关 键 词：天鹅加压接骨器 骨折愈合 生物力学 实验 内固定 

分 类 号：R318.17[医药卫生—生物医学工程] R683[医药卫生—基础医学]