Coutances

It is admitted that: * Joint replacement is a commonly performed major surgical procedure that has considerable success in alleviating pain and disability; * These procedures may be done with the help of a bone cement (PMMA) to fix the prosthesis to the bone (cemented fixation); * Most common reasons for primary joint replacement are osteoarthritis, osteonecrosis and trauma; * Most common reasons for revision of joint replacement are dislocation, infection, fracture and prothesis loosening; * Quality of bone cement have a large influence on long-term implant stability. TEKNIMED has developed several bone cements and a cement restrictor currently used in arthroplasty procedures. With the increasing use of these procedures, there is a need of real-life long-term safety and efficacy data on the bone cements. This retro- and prospective study is performed to assess the safety and performance of TEKNIMED arthroplasty products in their current clinical use.