Ki S W, Leung A K L, Li A N M
Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, China.
Prosthet Orthot Int. 2008 Sep;32(3):356-62. doi: 10.1080/03093640802016159.
Foot orthotic treatment is one of the major conservative methods used to handle foot problems. Total plantar contact foot orthoses are used to reduce and redistribute peak pressures. For the fabrication of a total plantar contact foot orthosis, the computer-aided design and computer-aided manufacturing (CAD-CAM) method has been applied. In this study, the plantar foot-orthosis interface pressure data during walking were collected by the Novel Pedar-mobile in-shoe plantar pressure measuring system. The data were collected under three conditions: (i) Flat insole, (ii) foot orthosis provided by the CAD-CAM method, and (iii) foot orthosis provided by the foam impression method. The Swiss Comfort CAD-CAM foot orthotics system was used in this study. For conditions (ii) and (iii), foot shapes were collected in partial weight bearing and subtalar neutral conditions. Thirty normal subjects were recruited for this study. The plantar foot surface was divided into eight plantar foot regions and then was investigated. These regions included the heel, the medial and lateral arches, the medial, mid and lateral forefoot, the hallux, and the lateral toes. The results showed that the orthoses provided by both the CAD-CAM and foam impression methods could decrease the peak pressure and the maximum force in the heel region, and increase the peak pressure and the maximum force in the medial arch region. Both orthoses redistributed the peak pressure and the maximum force from the heel to the medial arch region. The peak pressure in the mid forefoot region was different between the orthoses provided by the CAD-CAM and foam impression methods.
足部矫形治疗是用于处理足部问题的主要保守方法之一。全足底接触式足部矫形器用于降低和重新分配峰值压力。在全足底接触式足部矫形器的制作中，已应用计算机辅助设计和计算机辅助制造（CAD-CAM）方法。在本研究中，通过Novel Pedar-mobile鞋内足底压力测量系统收集行走过程中足底足部矫形器界面压力数据。数据在三种条件下收集：（i）平底鞋垫，（ii）通过CAD-CAM方法提供的足部矫形器，以及（iii）通过泡沫印模法提供的足部矫形器。本研究使用了瑞士舒适CAD-CAM足部矫形系统。对于条件（ii）和（iii），在部分负重和距下关节中立条件下收集足部形状。招募了30名正常受试者参与本研究。将足底表面分为八个足底区域，然后进行研究。这些区域包括足跟、内侧和外侧足弓、内侧、中间和外侧前足、拇趾以及外侧脚趾。结果表明，CAD-CAM和泡沫印模法提供的矫形器均可降低足跟区域的峰值压力和最大力，并增加内侧足弓区域的峰值压力和最大力。两种矫形器均将峰值压力和最大力从足跟重新分配到内侧足弓区域。CAD-CAM和泡沫印模法提供的矫形器在前足中部区域的峰值压力有所不同。
