The madreporic cementless total hip arthroplasty. New experimental data and a seven-year clinical follow-up study.

During the period from February 1975 to January 1, 1982, 1509 cementless total hip arthroplasties were performed employing madreporic prostheses. A previous study (1979) introducing this type of rough-surfaced implant and discussing the main requirements for a biologic cementless anchoring included new experimental data about the acetabular component, the threaded ring, indications, complications, and clinical results. A full assessment of the madreporic prosthesis must await ten-year follow-up data, but in view of the good results to date and the increasing incidence of failure with cemented prostheses, surgical cement may be unnecessary for many hip arthroplasties.