The cartilaginous-cup arthroplasty has been proposed as another method for handling ununited fractures of the neck of the femur, particularly those in Classes II and III. The method is admittedly a modification of the Brackett procedure and is similar anatomically to the methods described by Wagner; Venable, Stuck, and Beach; and others. Its originality, if there be any, is based primarily upon the utilization of the hyaline cartilage of the head of the femur as an autograft transplant. The results in nine cases are considered excellent, and two are poor.