Conclusion Total hip arthroplasty in patients younger than 55 years provides reliable outcomes at up to 10 years .
Background Total hip arthroplasty ( THA ) is increasingly performed in younger patients despite the lack of comprehensive assessment of long-term outcomes .
We systematic ally review ed the contemporary literature to assess the 1 ) indications , 2 ) implant selection and long-term survivorship , 3 ) complication and reoperation rates and 4 ) radiographic and functional outcomes of primary THA in patients younger than 55 years .
A new short uncemented, proximally fixed anatomic femoral implant with a prominent lateral flare: design rationals and study design of an international clinical trial
Background Anatomic short femoral prostheses with a prominent lateral flare have the potential to reduce stress-shielding in the femur through a more physiological stress distribution to the proximal femur . We present the design rationale of a new short uncemented , proximally fixed anatomic femoral implant and the study design of a prospect i ve multi-centre trial to collect long-term patient outcome and radiographic follow up data . Methods A prospect i ve surveillance study ( trial registry NCT00208555 ) in four European centres ( UK , Italy , Spain and Germany ) with a follow up period of 15 years will be executed . The recruitment target is 200 subjects , patients between the ages of 18 and 70 admitted for primary cementless unilateral THA will be included . The primary objective is to evaluate the five-year survivorship of the new cementless short stem .  The secondary objectives of this investigation are to evaluate the long term survivorship and the clinical performance of the implant , the impact on the subjects health related Quality of Life and the affect of the prosthesis on bone mineral density . Peri- and postoperative complications will be registered . Clinical and radiographic evaluation of prosthesis positioning will be done post-operatively and at 3 , 6 , 12 , 24 , 60 , 120 and 180 months follow up . Discussion Shortening of the distal stem can maximise bone and soft tissue conservation . New stem types have been design ed to improve the limitations of traditional implants in primary THA . A new , uncemented femoral short stem is introduced in this paper . A long-term follow up study has been design ed to verify stable fixation and to research into the clinical outcome . The results of this trial will be presented as soon as they become available
Conclusion Total hip arthroplasty in patients younger than 55 years provides reliable outcomes at up to 10 years .
Background Total hip arthroplasty ( THA ) is increasingly performed in younger patients despite the lack of comprehensive assessment of long-term outcomes .
We systematic ally review ed the contemporary literature to assess the 1 ) indications , 2 ) implant selection and long-term survivorship , 3 ) complication and reoperation rates and 4 ) radiographic and functional outcomes of primary THA in patients younger than 55 years .