Kobayashi Toshiki, Arabian Adam K, Orendurff Michael S, Rosenbaum-Chou Teri G, Boone David A
Orthocare Innovations, Mountlake Terrace, WA, USA.
Department of Engineering and Computer Science, Seattle Pacific University, WA, USA.
Clin Biomech (Bristol). 2014 Jan;29(1):47-56. doi: 10.1016/j.clinbiomech.2013.11.005. Epub 2013 Nov 13.
Energy storage and return feet are designed for active amputees. However, little is known about the socket reaction moments in transtibial prostheses with energy storage and return feet. The aim of this study was to investigate the effect of alignment changes on the socket reaction moments during gait while using the energy storage and return feet.
A Smart Pyramid™ was used to measure the socket reaction moments in 10 subjects with transtibial prostheses while walking under 25 alignment conditions, including a nominal alignment (as defined by conventional clinical methods), as well as angle malalignments of 2°, 4° and 6° (flexion, extension, abduction, and adduction) and translation malalignments of 5mm, 10mm and 15mm (anterior, posterior, lateral, and medial) referenced from the nominal alignment. The socket reaction moments of the nominal alignment were compared with each malalignment.
Both coronal and sagittal alignment changes demonstrated systematic effects on the socket reaction moments. In the sagittal plane, angle and translation alignment changes demonstrated significant differences (P<0.05) in the minimum moment, the moment at 45% of stance and the maximum moment for some comparisons. In the coronal plane, angle and translation alignment changes demonstrated significant differences (P<0.05) in the moment at 30% and 75% of stance for all comparisons.
The alignment may have systematic effects on the socket reaction moments in transtibial prostheses with energy storage and return feet. The socket reaction moments could potentially be a useful biomechanical parameter to evaluate the alignment of the transtibial prostheses.
储能回能脚是为活动型截肢者设计的。然而，对于带有储能回能脚的经胫骨假肢的接受腔反作用力矩，人们了解甚少。本研究的目的是调查在使用储能回能脚行走时，对线变化对步态期间接受腔反作用力矩的影响。
使用Smart Pyramid™测量10名经胫骨假肢受试者在25种对线条件下行走时的接受腔反作用力矩，包括名义对线（如传统临床方法所定义），以及相对于名义对线2°、4°和6°（屈曲、伸展、外展和内收）的角度对线不良和5mm、10mm和15mm（前、后、外侧和内侧）的平移对线不良。将名义对线的接受腔反作用力矩与每种对线不良情况进行比较。
冠状面和矢状面的对线变化均对接受腔反作用力矩产生系统性影响。在矢状面，角度和平移对线变化在一些比较中，在最小力矩、站立45%时的力矩和最大力矩方面显示出显著差异（P<0.05）。在冠状面，角度和平移对线变化在所有比较中，在站立30%和75%时的力矩方面显示出显著差异（P<0.05）。
对线可能对带有储能回能脚的经胫骨假肢的接受腔反作用力矩产生系统性影响。接受腔反作用力矩可能是评估经胫骨假肢对线的一个有用的生物力学参数。
