Study on the effect of plantar orthosis on plantar pressure and gait & posture of high arched foot

Because the medial longitudinal arch of high arched foot is too high, the elasticity of the foot arch is weakened. Compared with the balanced force on the sole of normal foot, the stability and buffering of the high arched foot are poor. Foot orthosis can effectively improve the dynamic plantar load of patients with high arch, reduce foot injury and relieve foot fatigue. In this paper, the effect of plantar orthosis on plantar pressure distribution and the characteristics of gait and posture of patients with high arched foot are analyzed and verified. The JasencoJsp (jasenco, JSP-C5, France) plantar pressure test system and the Sennotech Insole X dynamic gait analysis system are used to test a representative patient with high arched foot. The data of plantar pressure distribution, peak pressure, gait phase within a gait cycle, as well as foot microscopic characteristics before and after wearing the plantar orthosis are collected. The results show that the plantar orthosis can effectively reduce the plantar peak pressure and improve the plantar pressure distribution, so that the plantar pressure is relatively evenly distributed in the front, middle and rear foot. At the same time, the insufficient pronation during foot movement has been improved, the excessive tension of plantar fascia has been alleviated and the risk of abnormal gait such as varus has been reduced.