Abstract
Patients with severe knee osteoarthritis (OA) who can't be anesthetized because of severe general condition have to select the orthosis. Efficacy of G- II OA brace for such patients has been recommended. We evaluated dynamic characteristics of this orthosis by cineradiography. Five patients on or off-brace stood in front of the image tube of cineradiography system and were required to step with their toes on the floor. Twenty-forty pictures of the knee every 1/30 minutes during heel-on to off were measured at 5 points of medial eminentia and bilateral edges of the tibia and femur. We obtained instabilities of lateral thrust in the fluctuation of the eminentia, medial subluxation of the femur in the distance between medial border of the tibia and femur. In the condition of offbrace these instabilities increased according of the lord.
Three cases on-brace showed the reposition of the femur and the increase of lateral thrust.
Dynamic study of the severe OA of the knee by cineradiography revealed that G-II OA brace gave reposition of medial joint. These will be one of the factor that knee pain is subsided.
