Parameters influencing the outcome after total disc replacement at the lumbosacral junction. Part 1: misalignment of the vertebrae adjacent to a total disc replacement affects the facet joint and facet capsule forces in a probabilistic finite element analysis
Parameters influencing the outcome after total disc replacement at the lumbosacral junction. Part 1: misalignment of the vertebrae adjacent to a total disc replacement affects the facet joint and facet capsule forces in a probabilistic finite element analysis
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影响腰骶交界处全椎间盘置换后结果的参数第 1 部分：在概率有限元分析中，与全椎间盘置换相邻的椎骨错位会影响小关节和小关节囊力
DOI：
10.1007/s00586-013-2909-z
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发表时间：
2013
影响因子：
2.8
通讯作者：
Zander T
中科院分区：
文献类型：
--
作者：
Rohlmann A;Lauterborn S;Dreischarf M;Schmidt H;Putzier M;Strube P;Zander T
目的：球窝关节全椎间盘置换术后，关节活动度减少，关节突关节退变进展。该研究的目的是测试的假设，即错位的椎骨相邻的植入物减少的运动范围，并增加小关节或胶囊tensionforce.MethodsA概率有限元分析进行了使用腰骶椎模型与人工椎间盘在水平L5/S1。L5椎骨的错位、小关节的差距大小、后纵韧带的横断和脊柱形状是不同的。该模型加载纯moment.ResultsMisalignment的L5椎骨的运动范围减少了2°。L5椎骨在向前方向上的2 mm位移已经导致小关节力约为240 N。伸展、侧弯和轴向旋转引起的最大小关节力在280和380 N之间，而屈曲引起的最大力约为200 N。向后方向2 mm的位移导致约80 N的关节囊力。额外的时刻增加了最大的小关节囊力值之间的120和230 N.ConclusionsMisalignment的椎骨相邻的人工椎间盘强烈增加小关节或囊力。因此，这可能是临床结果不满意的重要原因。在一项相关的临床研究（第2部分）中，这些发现得到了验证。
PurposeAfter total disc replacement with a ball-and-socket joint, reduced range of motion and progression of facet joint degeneration at the index level have been described. The aim of the study was to test the hypothesis that misalignment of the vertebrae adjacent to the implant reduces range of motion and increases facet joint or capsule tensile forces.MethodsA probabilistic finite element analysis was performed using a lumbosacral spine model with an artificial disc at level L5/S1. Misalignment of the L5 vertebra, the gap size of the facet joints, the transection of the posterior longitudinal ligament, and the spinal shape were varied. The model was loaded with pure moments.ResultsMisalignment of the L5 vertebra reduced the range of motion up to 2°. A 2-mm displacement of the L5 vertebra in the anterior direction already led to facet joint forces of approximately 240 N. Extension, lateral bending, and axial rotation caused maximum facet joint forces between 280 and 380 N, while flexion caused maximum forces of approximately 200 N. A 2-mm displacement in the posterior direction led to capsule forces of approximately 80 N. Additional moments increased the maximum facet capsule forces to values between 120 and 230 N.ConclusionsMisalignment of the vertebrae adjacent to an artificial disc strongly increases facet joint or capsule forces. It might, therefore, be an important reason for unsatisfactory clinical results. In an associated clinical study (Part 2), these findings are validated.
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影响因子：
3
作者：
Roussouly, P;Gollogly, S;Dimnet, J
通讯作者：
Dimnet, J
影响因子：
3
作者：
Siepe, Christoph J.;Zelenkov, Pjotr;Mayer, Michael H.
通讯作者：
Mayer, Michael H.
CHARITÉ 与 ProDisc：至少 3 年随访的比较研究
影响因子：
3
作者：
C. Shim;Sang;Hoseung Shin;Han;Won;B. Jung;G. Choi;Y. Ahn;Seungcheol Lee;Ho Yeon Lee
通讯作者：
Ho Yeon Lee
移动核心式人工椎间盘位置和高度对腰椎生物力学行为的影响
DOI：
10.1243/09544119jeim241
发表时间：
2008
期刊：
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
影响因子：
--
作者：
A. Rohlmann;T. Zander;B. Bock;G. Bergmann
通讯作者：
G. Bergmann
人工椎间盘对腰椎生物力学的影响：概率有限元研究
影响因子：
2.8
作者：
A. Rohlmann;A. Mann;T. Zander;G. Bergmann
通讯作者：
G. Bergmann