[Post-operative fractures: epidemiology, predisposing factors]. / Fractures à distance de l'arthroplastie : épidémiologie, facteurs favorisants.

The general predisposing factors are female sex and osteoporosis. The local predisposing factor is loosening of the stem.As expected type III fractures are more frequent in case of osteoporosis (notion of elasticity gap) and fractures type II and I in case of loosening (notion of bone stock).