Efficacy of Risedronate in Patients With Painful Periprosthetic Resorption of the Hip Prothesis

This is an experimental study, prospective, comparative. This clinical trial is randomized and double-blind, Residronate versus placebo. The study aims to demonstrate the effectiveness of risedronate in pain management, after 18 month of traitment, in patients undergoing aseptic joint prosthesis loosening. 2 groups were compared with a 1: 1 ratio. The first group receives active drug (risedronate 75mg) and the second a placebo. Patients are treated during 18 months: 1 tablet residronate/placebo per os two consecutive days each month. Evaluations are planned evry 6 months.