The so-called protrusio socket technique of total hip arthroplasty was
shown to be very effective in a series of twenty-two chronically dislocated
or subluxated hips. In seventeen patients with follow-up of sixteen to
fifty-nine months, excellent results were obtained in all but two hips.
Obesity and rheumatoid arthritis or other systemic causes of osteopenia are
considered contraindications to the procedure.