Leung A K, Mak A F, Evans J H
Jockey Club Rehabilitation Engineering Centre, Hong Kong Polytechnic University, Hung Hom, Kowloon.
Prosthet Orthot Int. 1998 Apr;22(1):25-34. doi: 10.3109/03093649809164454.
Flexible flat foot subjects attending the prosthetics and orthotics units come with prescriptions from orthopaedic surgeons for arch supports. Usually a pair of thermoformed plastic inserts are fabricated and fitted to treat the patients. However the effect of the orthotic treatment is not yet clear. A motion analysis system with two video cameras placed on the lateral and rear sides of the subject together with one force platform was used to investigate the immediate effects of the orthotic treatment. The force platform collected force data and the two cameras captured two-dimensional displacement data of the lower limb. Eight subjects, all having an arch index (AI) larger than 3.0 participated in the study. For each subject, three successful steps on the force platform were videotaped for both the shod (with shoe only) and the orthotic (with shoe and orthosis) conditions. The kinetic variables were normalized to individual body weight and averaged for each subject. A Paired t-test was conducted to analyse sample means of matched pairs between the shod and the orthotic conditions. The results showed changes in displacement data with relatively little change in the collected force data. The modified UCBL shoe insert evaluated significantly affected the orientation and movements of the subtalar joint, ankle joint and knee joint. These immediate effects reduced the degree and duration of abnormal pronation during the stance phase and thus had the potential for decreasing strain in the plantar ligaments and reducing abnormal tibial rotation which may be therapeutic for the foot.
前往假肢与矫形器科室就诊的柔韧性扁平足患者会携带骨科医生开具的足弓支撑处方。通常会制作并安装一对热成型塑料鞋垫来治疗这些患者。然而，矫形治疗的效果尚不清楚。使用一个在受试者侧面和后方放置两台摄像机以及一个测力平台的运动分析系统，来研究矫形治疗的即时效果。测力平台收集力数据，两台摄像机捕捉下肢的二维位移数据。八名足弓指数（AI）大于3.0的受试者参与了该研究。对于每名受试者，在测力平台上分别拍摄了穿着鞋子（仅穿鞋）和穿着矫形器（穿鞋并佩戴矫形器）两种情况下的三个成功步态。将动力学变量归一化到个体体重，并对每名受试者进行平均。进行配对t检验以分析穿着鞋子和穿着矫形器两种情况下匹配对的样本均值。结果显示位移数据有变化，而收集到的力数据变化相对较小。经评估，改良的UCBL鞋垫对距下关节、踝关节和膝关节的方向及运动有显著影响。这些即时效果减少了站立期异常旋前的程度和持续时间，因此有可能减轻足底韧带的应变，并减少异常的胫骨旋转，这可能对足部具有治疗作用。
