The change of gait analysis on applying metatarsal-bar used 3D motion analysis

Introduction Enough dorsiflexion angle of the first metatarsophalangeal joint is needed to ensure thrust and stability [1], and if the range of motion of the first metatarsophalangeal joint decreases, normal foot function during gait is under severe restriction [2]. Wearing shoes with high heels during gait makes weight leaning forward and wearing them for long may cause deformation of hallux valgus [3,4]. General therapeutic concepts of foot diseases focus on reducing or eliminating plantar tissue stress. Recently, studies on treatment to solve these problems have been conducted, but there have been a few studies on orthotic devices such as metatarsal pad, dome and wedge [5]. Therefore, this study applied bar metatars ophalangeal area of normal persons and examined if any change occurs of spatio-temporal indices and kinematic parameters by using 3D motion analysis system.