腰椎棘突间动态稳定装置Coflex不同置入深度对相邻节段运动范围影响的生物力学研究  被引量:15

Adjacent segment range of motion after different insertion depth of lumbar interspinous dynamic stabilization device(Coflex): a biomechanical study

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作  者:祖丹[1] 海涌[2] 云才[1] 鲁世保[2] 刘玉增[2] 李士春[1] 李钦亮[1] 

机构地区:[1]首都医科大学石景山教学医院北京市石景山医院骨科,北京市100043 [2]首都医科大学附属北京朝阳医院骨科,北京市100020

出  处:《中国脊柱脊髓杂志》2014年第10期933-937,共5页Chinese Journal of Spine and Spinal Cord

基  金:北京市自然科学基金(项目编号:7112056)

摘  要:目的:探讨置入腰椎棘突间动态稳定装置Coflex不同深度后对上下相邻节段运动范围的影响。方法:将6具新鲜成人尸体腰椎标本(Ll~L5)两端固定在生物力学测试系统上,以L3/4节段为手术节段,L2、L3、L4、L5椎体放置运动范围记录系统用以记录相邻节段(L2/3、L4/5)运动范围。分别对腰椎标本完整状态(保持腰椎韧带及小关节完整)、5ram状态(Coflex的U形顶端距离硬脊膜5ram)、0mm组(距离为0mm)分别加载8N·m的纯力矩进行生物力学测试,测试顺序为前屈、后伸、左右侧弯、左右侧旋,并记录相邻节段L2/3、L4/5的运动范围。对3组标本在6个方向的相邻节段(L2/3、L4/5)运动范围分别行单个因素的重复测量方差分析。两两对比采用LSD检验。结果:L2/3节段在前屈、后伸、左右侧弯、左右侧旋6个方向的运动范围.完整组分别为4.23°±0.25°、3.56°±0.14°、3.07°±0.12°、3.34°±O.08°、2.53°±O.16°、2.44°±0.11°;5mm组分另0为4.40°±0.21°、3.64°±0.14°、3.09°±0.11°、3.35°±0.07°、2.54°±0.16°、2.46°±0.10°;0mm组分另0为4.47°±0.20°、3.72°±0.16°、3.14°±0.10°、3.38°±0.08°、2.58°±0.15°、2.49°±0.12°;三组问差异均无统计学意义(P〉0.05)。L4/5节段三组标本在前屈、后伸、左右侧弯、左右侧旋6个方向的运动范围,完整组分别为3.80°±0.28°、3.45°±0.11°、3.25±0.11°、3.28°±0.13°、2.44°±0.11°、2.42°±0.11°;5mm组分另U为3.86°±0.28°、3.52°±0.11°、3.28°±0.09°、3.31°±O.05°、2.50°±0.07°、2.46°±0.09°:0mm组分别为3,90°±0.28°、3,59°±0.10°、3.32°±O.08°、3.36°±O,06°、2.52°±0,08°、2,48°±0.09°:三组间差异均无统计学意义(P〉0.05)。结论:腰椎棘突间动态稳Objectives: To evaluate the lumbar adjacent segment range of motion after different insertion depth of lumbar interspinous dynamic stabilization device(Coflex). Methods: Six fresh adult human cadaveric lumbar spine specimens(L1-LS) were fixed in a material testing system(MTS) by embedding to clamps with L1 and L5 vertebrae. L3/4 of each specimen was operated. The L2, L3, IA, L5 vertebra was inserted one spacer respectively which was used to record the range of motion(ROM) of the adjacent segments(L2/3, IA/5). Each lumbar spine specimen was tested according to the loading sequence at 3 groups: intact(keeping lumbar liga- ment and facet joint intact) group, 5mm insertion (distance between apex of U-shaped Coflex and dural sac was 5mm) group and Omm insertion(distance was Omm) group. Each lumbar spine specimen was loaded with pure moments of 8N.m according to a loading sequence consisting of flexion, extension, left/right lateral bend- ing, left/right axial rotation and the ROM of adiacent segment was recorded.

关 键 词:腰椎 相邻节段 内固定器 假体置入 生物力学 

分 类 号:R318.01[医药卫生—生物医学工程]

 

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