Long-term Effects of Plantar Plate Therapy for Subtalar Joint Valgus Type for One Case Osteoarthritis of the Knee

Abstract

There are many research reports showing that the effect of plantar plate on medial knee OA is effective in the short term, but there are few reports that it is effective for a long period of 6 months or longer. Also although there are many studies on plantar plate in the varus type of the subtalar joint, there are few studies in the valgus type of the subtalar joint. In this study, we investigated the long-term effect of wearing a plantar plate that guides the subtalar joint to a neutral position in patients with the subtalar joint valgus type. The case is an elderly female diagnosed with bilateral knee osteoarthritis. The case is an elderly female diagnosed with bilateral knee osteoarthritis. X-ray evaluation was right III, left III in KL grade.The plantar plate was evaluated by comparing the 10 m maximum effort walking time and pain evaluation VAS, the total consumption and the number of steps in one week without and immediately after wearing the plantar plate. In order to examine the long-term effects, functional evaluation was performed 3 months, 6 months, and 12 months after the installation of the plantar plate.As a result, 10m walking time and walking pain improved, suggesting improvement in long-term walking ability after 3 months, 6 months, and 12 months. In addition, SF36.v2, a health-related QOL evaluation scale, total consumption, and number of steps improved, and a weight loss effect was obtained. Based on the above, it is suggested that the manufactured plantar plate is effective for a long period of time. I thought For cases in which the subtalar joint is valgus, a plantar plate that induces varus to the subtalar joint is more suitable than a lateral wedge-shaped plantar plate that induces valgus to the subtalar joint.