Dynamic contact stress patterns on the tibial plateaus during simulated gait: a novel application of normalized cross correlation.
Dynamic contact stress patterns on the tibial plateaus during simulated gait: a novel application of normalized cross correlation.
复制标题
在模拟步态过程中，胫骨高原上的动态接触应力模式：归一化跨相关的新型应用。
DOI：
10.1016/j.jbiomech.2013.11.042
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发表时间：
2014-01-22
影响因子：
2.4
通讯作者：
Maher, Suzanne
中科院分区：
文献类型：
--
作者：
Wang, Hongsheng;Chen, Tony;Torzilli, Peter;Warren, Russell;Maher, Suzanne
在日常生活活动中，膝关节局部接触应力的空间分布和模式尚未得到充分的研究。本研究的目的是确定是否常见的接触应力模式存在于人类膝关节胫骨平台在模拟步态。为了验证这一假设，我们开发了一种新的归一化相互关联（NCC）算法，并将其应用于12具人体尸体膝盖在多向负荷模拟步态下的胫骨平台接触应力。比较了胫骨平台不同位置的接触应力分布，确定了具有相似接触应力模式的区域。发现了3种一致的区域模式，其中2种最突出的接触应力模式被9 ~ 12个膝盖共享，第三种模式被6 ~ 8个膝盖共享。第一种模式位于胫骨内侧平台的后侧，在站立早期有一个单一的峰值应力。第二种模式位于外侧平台的中央和后部，由两个峰值应力组成，与早期和晚期站立时的峰值轴向力时间一致。第三种模式是在内侧平台软骨与软骨接触区域的前部发现的，由双峰应力组成。接触应力模式的位置和轮廓的差异表明，内侧半月板和外侧半月板在步态周期的不同阶段承担负荷：内侧半月板的后部只在站立的早期阶段持续分配负荷，而外侧半月板的后部在站立的早期和晚期都持续分配负荷。这种新方法可以帮助识别膝关节接触力学的异常，并提供更好的理解导致创伤后骨关节炎的力学途径。
The spatial distribution and pattern of local contact stresses within the knee joint during activities of daily living have not been fully investigated. The objective of this study was to determine if common contact stress patterns exist on the tibial plateaus of human knees during simulated gait. To test this hypothesis, we developed a novel normalized cross-correlation (NCC) algorithm and applied it to the contact stresses on the tibial plateaus of twelve human cadaveric knees subjected to multi-directional loads mimicking gait. The contact stress profiles at different locations on the tibial plateaus were compared, where regions with similar contact stress patterns were identified across specimens. Three consistent regional patterns were found, among them two most prominent contact stress patterns were shared by 9 to 12 of all the knees and the third pattern was shared by 6 to 8 knees. The first pattern was located at the posterior aspect of the medial tibial plateau and had a single peak stress that occurred during the early stance phase. The second pattern was located at the central-posterior aspects of the lateral plateau and consisted of two peak stresses coincident with the timing of peak axial force at early and late stance. The third pattern was found on the anterior aspect of cartilage-to-cartilage contact region on the medial plateau consisted of double peak stresses. The differences in the location and profile of the contact stress patterns suggest that the medial and lateral menisci function to carry load at different points in the gait cycle: with the posterior aspect of the medial meniscus consistently distributing load only during the early phase of stance, and the posterior aspect of the lateral meniscus consistently distributing load during both the early and late phases of stance. This novel approach can help identify abnormalities in knee contact mechanics and provide a better understanding of the mechanical pathways leading to post-traumatic osteoarthritis.
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影响因子：
2.4
作者：
Kozanek, Michal;Hosseini, Ali;Liu, Fang;Van de Velde, Samuel K.;Gill, Thomas J.;Rubash, Harry E.;Li, Guoan
通讯作者：
Li, Guoan
影响因子：
2.4
作者：
Cottrell, Jocelyn M.;Scholten, Paul;Maher, Suzanne A.
通讯作者：
Maher, Suzanne A.
影响因子：
4.8
作者：
Wang, Hongsheng;Fleischli, James E.;Zheng, Naiquan (Nigel)
通讯作者：
Zheng, Naiquan (Nigel)
影响因子：
2.8
作者：
Anderst, William J.;Tashman, Scott
通讯作者：
Tashman, Scott
影响因子：
2.8
作者：
Beveridge, Jillian E.;Heard, Bryan J.;Frank, Cyril B.
通讯作者：
Frank, Cyril B.