Colonna capsular arthroplasty is a two-stage procedure for congenital dislocation of the hip, but is not suitable for congenital subluxation. The bone architecture of the femoral head should approach the nearly normal and the child preferably should be more than three years old and less than eight if the best functional result is to be obtained. These brief case reports of five patients who could be followed for from one year and one month to more than seventeen years document the fact that the procedure may produce a hip with an excellent roentgenographic appearance and enduring satisfactory function.