Kinematic evaluation of cruciate-retaining total knee replacement patients during level walking: A comparison with the displacement-controlled ISO standard
Kinematic evaluation of cruciate-retaining total knee replacement patients during level walking: A comparison with the displacement-controlled ISO standard
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DOI：
10.1016/j.jbiomech.2009.06.030
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发表时间：
2009-10-16
影响因子：
2.4
通讯作者：
Wimmer, Markus A.
中科院分区：
文献类型：
--
作者：
Ngai, Valentina;Wimmer, Markus A.
已经报告了模拟器测试的和回收的胫骨全膝关节置换（TKR）内衬的磨痕特征之间的差异。这种不一致可能是由于体内运动学特征与国际标准化组织（ISO）定义的特征之间的差异。本研究的目的是确定TKR受试者组在水平行走过程中的膝关节运动学，并将其与ISO标准定义的位移控制膝关节磨损测试模拟器的运动曲线进行比较。使用点簇技术对29名采用后交叉韧带保留型TKR设计的患者进行步态测试，以获得屈伸（FE）旋转，前后（AP）平移和内外（IE）旋转膝关节运动在一个完整的周期水平行走。将体内运动数据中关键点的相对运动范围和时间与来自位移控制LED磨损测试标准ISO 14243 -3的输入曲线的相同范围和相同关键点进行比较。受试者表现出与ISO相似的FE模式。从站立中期到站立末期，FE旋转范围的差异不显著。然而，从站立末期到摆动，受试者具有显著更高的膝关节屈曲范围。受试者还表现出整个步态周期的相位延迟。对于所有平移，标准轮廓具有统计学上显著低于体内观察到的幅度。AP运动的相反模式也从站立中期和摆动中明显。ISO规定了一个较小的IE总旋转范围，其运动模式与体内运动模式完全相反。总之，与ISO相比，体内运动的幅度和模式存在显著差异。(C)2009爱思唯尔有限公司版权所有。
Differences between wear-scar features of simulator-tested and retrieved tibial total knee replacement (TKR) liners have been reported This disagreement may result from differences between in vivo kinematic profiles and those defined by the International Organization for Standardization (ISO). The purpose of this study was to determine the knee kinematics of a TKR subject group during level walking and compare them with the motion profiles defined by the ISO standard for a displacement-controlled knee wear testing simulator Twenty-nine patients with a posterior cruciate ligament-retaining TKR design were gait tested using the point cluster technique to obtain flex ton-extension (FE) rotation, anterior-posterior (AP) translation and internal-external (IE) rotation knee motions during a complete cycle of level walking. Relative ranges of motion and timing of key points within the in vivo motion data were compared against the same ranges and same key points from the input profiles of the displacement-control led wear testing standard ISO14243-3. The subjects exhibited a FE pattern similar to ISO. with an insignificant difference in range of FE rotation from midstance to terminal stance However, the subjects had a significantly higher range of knee flexion from terminal stance into swing The subjects also exhibited a phase delay for the entire gait cycle For All translation, the standard profile had statistically significant lower magnitudes than seen in vivo Opposite pattern of AP motion was also apparent from midstance and swing Similarly. ISO specified a smaller IE total range of rotation with a motion pattern in complete opposition to that seen in vivo In conclusion, significant differences were found in both the magnitudes and pattern of in vivo motion compared with ISO. (C) 2009 Elsevier Ltd. All rights reserved.