 Every single year approximately 60.000 hip prostheses are implanted in Italy. Quality of life of patients after surgery is very good, as widely demonstrated in clinical experience and in the literature. On the basis of data produced by the only complete hip register in Italy, that is run in our Lab RIPO, Register of Orthopedic Implants in the Region Emilia-Romagna survival rate of primary total hip prosthesis is 95.6 at 9 years. Reasons for revision are mainly aseptic loosening of one or both components 40 of the total and dislocation 26, being the latter much more frequent in the first two years. Less frequently revision is due to sepsis 7 of the total,bone fracture 11, prosthesis fracture 3 or pain 3. 