A monocentric, retrospective and prospective, non-randomised, clinical survey to evaluate Mpact cup performance 5 years following Total hip arthroplasty

Total hip arthroplasty (THA) is one of the most commonly performed and successful orthopaedic operations in improving a patient’s quality of life. Orthopaedic surgeons are continually striving to improve all aspects of care relating to this procedure whether this is improvements in implant technology, instrument improvement, or the technique involved in performing the procedure. During the last decade, a new titanium porous coating was introduced to improve the osteointegration for the uncemented acetabular component. A high surface friction and scratch-fit allows for secure initial fixation, whereas the high porosity ensures bony ingrowth thus providing secondary long term stability. With higher porosity in respect with standard coatings, for any given percentage filling, a greater volume of bone is present within the porous surface, thus giving a proportionate increase in interface strength. Mpact cup is a modular hemispherical press-fit acetabular shell with an external Titanium porous coating called Ti-Growth (Medacta commercial name: MectaGrip). The primary objective of this study is to evaluate Mpact clinical and radiological performance through the modified Harris Hip Score (MHSS) and standard x-rays. 50 patients who had underwent a THA with a Mpact cup will be recruited during the 5-year follow-up visit to be observed up to 5-years post-surgery. Retrospectively collected data includes surgical details such as device implanted and complications that occurred, and postoperative clinical and radiological assessments. MHSS at the 5year follow-up will be collected prospectively which is anticipated to take 10minutes to complete. Radiographic assessments and adverse event reports, if required, will also be completed prospectively.