摘要
目的探讨应用真空搅拌骨水泥技术的椎体后凸成形术的生物力学特点。方法新鲜成年羊的腰段椎体48个,乙二胺四乙酸二钠(EDTA-Na2)脱钙法制备离体动物椎体骨质疏松模型,在生物力学试验机上垂直压缩制备椎体压缩性骨折模型,将模型随机分为4组,骨折模型对照组及试验组分别行应用真空骨水泥搅拌技术的椎体后凸成形术和应用空气中搅拌骨水泥技术的椎体后凸成形术,对各组生物力学性能进行比较。结果 A组(骨质疏松椎体对照组)椎体前缘压缩值为0.474±0.073 mm,B组(骨质疏松椎体骨折对照组)椎体前缘压缩值为3.215±0.231 mm,C组(空气中搅拌骨水泥技术PKP组)椎体前缘压缩值为1.164±0.180 mm,D组(真空搅拌骨水泥技术PKP组)椎体前缘压缩值为0.920±0.159 mm。两种骨水泥技术PKP术后椎体前缘压缩程度均小于骨质疏松椎体骨折对照组,且大于骨质疏松椎体对照组;其中真空搅拌骨水泥技术PKP组的椎体前缘压缩值小于空气中真空搅拌骨水泥技术PKP组。结论真空搅拌骨水泥技术应用于椎体后凸成形术能够提高术后伤椎的生物力学稳定性。
Objective To investigate biomechanical characteristics of kyphoplasty using the vacuum mixed bone cement. Methods Forty-eight fresh lumbar vertebraes of adult sheep were randomly divided into four groups,each group included 12 vertebraes.These vertebraes were made in vitro vertebral osteoporosis models by edetate disodium（EDTANa2） decalcificating, and then biomechanical testing machine was used to make the models of compressed vertebral fractures by applying vertical compression. One of the fracture model group was applied kyphoplasty using air-mixing cement,and another fracture model group was applied kyphoplasty using vacuum-mixing cement.The biomechanical properties of all the four groups were compared. Results The vertebral compression of group A（control group of osteoporotic vertebraes） was 0.474±0.073 mm,group B（control group of fractured osteoporotic vertebrae） was 3.215±0.231 mm, group C（applied kyphoplasty using air-mixing cement） was 1.164±0.180 mm,group D（applied kyphoplasty using vacuum-mixing cement） was 0.920±0.159 mm. The vertebral compression of the two kyphoplasty groups was less than the control group of fractured osteoporotic vertebraes,and more than the control group of osteoporotic vertebraes.And the vertebral compression of the group applied kyphoplasty using vacuum-mixing cement was less than the group applied kyphoplasty using air-mixing cement. Conclusion The technology of vacuum-mixing cement used in kyphoplasty can improve the biomechanical stability of fractured osteoporotic vertebrae.
出处
《中国现代医生》
2015年第1期58-60,共3页
China Modern Doctor
