中华医学杂志
中華醫學雜誌
중화의학잡지
National Medical Journal of China
2011年
21期
1498-1501
,共4页
满毅%郑月焕%曹鹏%陈博%郑涛%孙长惠%陆炯
滿毅%鄭月煥%曹鵬%陳博%鄭濤%孫長惠%陸炯
만의%정월환%조붕%진박%정도%손장혜%륙형
脊柱融合术%脊柱骨折%合金
脊柱融閤術%脊柱骨摺%閤金
척주융합술%척주골절%합금
Spinal fusion%Spinal fracture%Alloys
目的 观察椎体复位融合器治疗创伤性和骨质疏松性椎体压缩骨折的生物力学性能.方法 用带有辅助撑开拉杆的镍钛温度记忆合金椎体复位融合器,在X线透视下经椎弓根入路植入实验性的尸体胸腰椎压缩骨折标本中,将塌陷的椎体终板复位并撑开压缩的椎体,采用X线和CT重建技术观察复位和撑开的效果,采用牛物力学测试机测量同定节段的疲劳强度.结果 本装置的温度形状记忆效应能基本达到复位塌陷的终板和椎体的撑开要求,超弹性特点又能使辅助撑开拉杆在复位和撑开效果不佳时给予额外的撑开复位力量.生物力学测试显示本装置能耐受超过1800 kg·m·s-2的纵向垂直负荷.结论 带有辅助撑开拉杆的镍钛温度记忆合金椎体复位融合器能达到有效的终板复位、椎体高度恢复和即刻脊柱生物力学稳定性,设计合理、适用于治疗创伤性和骨质疏松性椎体压缩骨折.
目的 觀察椎體複位融閤器治療創傷性和骨質疏鬆性椎體壓縮骨摺的生物力學性能.方法 用帶有輔助撐開拉桿的鎳鈦溫度記憶閤金椎體複位融閤器,在X線透視下經椎弓根入路植入實驗性的尸體胸腰椎壓縮骨摺標本中,將塌陷的椎體終闆複位併撐開壓縮的椎體,採用X線和CT重建技術觀察複位和撐開的效果,採用牛物力學測試機測量同定節段的疲勞彊度.結果 本裝置的溫度形狀記憶效應能基本達到複位塌陷的終闆和椎體的撐開要求,超彈性特點又能使輔助撐開拉桿在複位和撐開效果不佳時給予額外的撐開複位力量.生物力學測試顯示本裝置能耐受超過1800 kg·m·s-2的縱嚮垂直負荷.結論 帶有輔助撐開拉桿的鎳鈦溫度記憶閤金椎體複位融閤器能達到有效的終闆複位、椎體高度恢複和即刻脊柱生物力學穩定性,設計閤理、適用于治療創傷性和骨質疏鬆性椎體壓縮骨摺.
목적 관찰추체복위융합기치료창상성화골질소송성추체압축골절적생물역학성능.방법 용대유보조탱개랍간적얼태온도기억합금추체복위융합기,재X선투시하경추궁근입로식입실험성적시체흉요추압축골절표본중,장탑함적추체종판복위병탱개압축적추체,채용X선화CT중건기술관찰복위화탱개적효과,채용우물역학측시궤측량동정절단적피로강도.결과 본장치적온도형상기억효응능기본체도복위탑함적종판화추체적탱개요구,초탄성특점우능사보조탱개랍간재복위화탱개효과불가시급여액외적탱개복위역량.생물역학측시현시본장치능내수초과1800 kg·m·s-2적종향수직부하.결론 대유보조탱개랍간적얼태온도기억합금추체복위융합기능체도유효적종판복위、추체고도회복화즉각척주생물역학은정성,설계합리、괄용우치료창상성화골질소송성추체압축골절.
Objective To test the nickel-titanium (Ni-Ti) shape memory alloys of vertebral body reduction fixator with assisted distraction bar for the treatment of traumatic and osteoporotic vertebral body fracture. Methods A Ni-Ti shape memory alloys of vertebral body reduction fixator with assisted distraction bar was implanted into the compressed fracture specimens through vertebral pedicle with the radiographic monitoring to reduce the collapsed endplate as well as distract the compressed vertebral fracture. Radiographic film and computed tomographic reconstruction technique were employed to evaluate the effects of reduction and distraction. A biomechanic test machine was used to measure the fatigue and the stability of deformation of fixation segments. Results Relying on the effect of temperature shape memory,such an assembly could basically reduce the collapsed endplate as well as distract the compressed vertebral fracture. And when unsatisfied results of reduction and distraction occurred, its superflexibility could provide additional distraction strength. Conclusion A Ni-Ti shape memory alloys of vertebral body reduction fixator with assisted distraction bar may provide effective endplate reduction, restore the vertebral height and the immediate biomechanic spinal stability. So the above assembly is indicated for the treatment of traumatic and osteoporotic vertebral body fracture.
