IMA II brace for deambulatory treatment of Legg-Perthes disease.

Orthotic devices usually prescribed for ambulatory treatment of Legg-Perthes disease do not meet the severe kinematic requirements necessary for a comfortable gait. This paper describes the IMA II brace which offers several advantages in comparison with conventional braces. It is shown that improved kinematic characteristics are obtained by the use of six joints placed symmetrically at two levels of the brace.