The Johansson classification of periprosthetic hip fractures was the first classification system proposed and is the simplest. It is based on the level of fracture in relation to the prosthesis.
- type I: fracture proximal to tip of prosthesis with stem still in contact with medullary canal
- type II: fracture extends distal to tip of prosthesis, with dislodgement of stem from medullary canal of distal fragment
- type III: fracture entirely distal to tip of prosthesis
Other classification systems for periprosthetic hip fracture include: