一种新型动力内固定系统联合经伤椎椎弓根椎体内植骨治疗单节段胸腰段爆裂骨折的生物力学研究  

Biomechanical study of a new dynamic stabilization system combinedwith transpedicular intracorporeal bone grafting for Thoracolumbar burst fractures

作　　者：郑晓勇[1] 赵东升[1] 马远征[1] 余清文[1] 黄爱文[1] 刘道宏[1] 侯树勋[2] Zheng Xiaoyong Zhao Dongsheng Ma Yuanzheng et al.(Department of Orthopaedics, PLA 309 Hospital, Beijing, 100091 Department of Orthopedics, the First Affiliated Hospital of PL A General Hospital Beijing, 100037, China)

机构地区：[1]解放军第309医院骨科,北京100091 [2]解放军总医院第一附属医院骨科,北京100037

出　　处：《生物骨科材料与临床研究》2016年第5期9-12,I0004,共5页Orthopaedic Biomechanics Materials and Clinical Study

摘　　要：目的测试新型动力内固定系统联合经伤椎椎弓根椎体内植骨的稳定性效果。方法选取人新鲜尸体胸腰段标本制作L_2椎体爆裂骨折的模型,测试新型动力内固定系统联合经伤椎椎弓根椎体内植骨的稳定性效果。结果动力内固定联合经伤椎椎弓根椎体内植骨与骨折状态相比,屈伸及侧屈方向的ROM均显著减小;旋转方向的ROM虽也显著减小,但明显大于完整状态。结论新型动力内固定系统联合经伤椎椎弓根椎体内植骨能够维持胸腰段爆裂骨折在屈伸及侧屈方向的稳定性,但在旋转方向上不足以提供足够的稳定性。Objective To determine the magnitude of stabilization of the new dynamic system combined with transpedicular intracorporeal bone grafting. Methods Six thoracolumbar cadaver spines were used for testing. A controlled L2 burst fracture was created. The L1-3 motions were determined. Reaults In extension, flexion and lateral bending, the dynamic fixator stabilized the segment to a ROM below the magnitude of the intact spine, but showed an increased ROM of axial rotation （P〈0.05） compared with the intact spine. Conclusion Restoration of stability with the newly developed dynamic system combined with transpedicular intracorporeal bone grafting is possible in flexion, extension, right and left lateral bending for thoracolumbar burst fracture but for axial rotation.

关 键 词：动力内固定 非融合技术 胸腰段 爆裂骨折 生物力学 

分 类 号：R687.3[医药卫生—骨科学]