中国组织工程研究与临床康复2011，Vol.15Issue(39)：7284-7287,4.DOI:10.3969/j.issn.1673-8225.2011.39.016
短节段椎弓根螺钉置入内固定椎体成形治疗胸腰椎骨折的生物力学检测
Biomechanics of vertebroplasty-augmented short-segment pedicle screw fixation of traumatic thoracolumbar fractures
李家谋 1张昆亚 2韩伟峰 1林欣 1刘志成2
作者信息
- 1. 首都医科大学附属北京天坛医院骨科,北京市100050
- 2. 首都医科大学生物工程学院生物力学实验室,北京市100069
- 折叠
摘要
Abstract
BACKGROUND: Vertebroplasty-augmented short-segment pedicle screw fixation is developed to avoid implant loosing, rupture.Bone nonunion, and loss of kyphosis due to single pedicle screw fixation for treatment of thoracolumbar fractures. This treatmenthas been applied in clinic, but the relevant biomechanical studies are rare.OBJECTIVE: To observe the biomechanical changes in the treatment of traumatic thoracolumbar fractures with short-segmentpedicle screw fixation with vertebroplasty.METHODS: Twelve fresh frozen thoracolumbar spines (T1z-Lz) were used. Models of traumatic thoraco lumbar fractures wereprepared and divided into three groups: Percutaneous vertebroplasty (FVP) group, pedicle screw fixation group, andPVP-augmented short-segment pedicle screw fixation group.RESULTS AND CONCLUSION: In the three groups, the cement distribution area was all beyond 50% vertebral body. The failureload andstiffness in the PVP-augmented short-segment pedicle screw fixation group were higher than those in the othertivogroups (P ＜ 0.05). Screw bending formed due to a lower intensity in the pedicle screw fixation group than that in thePVP-augmented short-segment pedicle s crew fixation group. Vertebroplasty supplementation may improve the axial pulloutstrength, f ailure load and stiffness of the short-segment pedicle screw. It is im portant fo rdecreasing the incidence of pedicle screwfailure and progressive spinal deformity.关键词
胸腰椎骨折/椎体成形/生物力学/椎弓根螺钉/内固定分类
基础医学引用本文复制引用
李家谋,张昆亚,韩伟峰,林欣,刘志成..短节段椎弓根螺钉置入内固定椎体成形治疗胸腰椎骨折的生物力学检测[J].中国组织工程研究与临床康复,2011,15(39):7284-7287,4.
