保留前纵韧带植骨加内固定治疗脊柱爆裂骨折稳定性分析

目的 评价短节段前ａｎｅｄａ器械、后路经椎弓根螺针Ｓｔｅｆｆｅｅ钢板、后路节段性钢丝固定哈氏撑开棒３种手术在保留前纵韧带椎体间植骨状态下，治疗脊柱爆裂骨折提供的生物力学稳定能力。方法 利用传感器及电测技术，采用１２具新鲜人体胸腰段脊柱标本，计算平均顺应系数。结果 除节段性钢丝的哈氏撑开棒手术在旋转状态失稳外，３种手术在轴压、前屈、后伸、侧弯、旋转运动方式均能提供满意的稳定性。结论 Ｋａｎｅｄａ器械

Three Internal Fixations in Treating Spinal Burst Fracture with Bone Graft and Intact Longitudinal Ligament

Objective The three-dimensional stability of the spine injuries (i.e. burst fracture) treated respectively by three kinds of internal fixations with interbody strut bone graft and intact longitudinal ligament was studied. Methods Twelve intact fresh cadaveric thoracolumbar specimens were measured by 3-degree freedom electrogniometer force and displacement transducers .The mean flexibility was computed. The operative techniques included the Steffee transpedicular screws and plates (Steffee), the Kaneda anterior device with transverse fixators (Kaneda) and Harrington distraction rod fixation supplemented with segmental sublaminar wires (s.Harrington). Results These operative techniques could provide good stability in compressive loading, flexion, extension, lateral bending and rotation (except.s Harrington in rotation).Conclusions The result revealed that Kaneda was a good spine implant in treating spinal burst fracture.