An Investigation into the Clinical Performance of the Medacta Masterloc Stem in patients undergoing Total Hip Replacement Procedures

Total Hip Arthroplasty (THA) is a procedure commonly performed in patients who have end-stage hip osteoarthritis. During THA, the damaged bone and cartilage is removed and replaced with several prosthetic components, including a femoral stem and acetabular cup. The MasterLoc HA femoral stem is a cementless flat dual tapered wedge stem, designed to restore the anatomy of the patient enhancing mediolateral stability with reduced removal of bone. This uniquely designed stem offers three offset options within an 11 mm range that do not change leg length. Furthermore, it is coated with a proprietary technology, called Mectagrip, with plasma sprayed titanium and hydroxyapatite to assist with biological fixation. The newly designed MasterLoc Stem device has been introduced into the Australian market, however, its short and long-term performance is yet to be evaluated. The purpose of this current investigation will be to observe the level of patient satisfaction reported following implantation of a MasterLoc stem. Patients who are planned to undergo THA surgery and fit the eligibility criteria will be considered for enrolment in this study. The stem will be implanted by qualified and experienced orthopaedic surgeons as per routine practice. The duration of the procedure will take approximately 1-1.5 hours, as per a standard THA. Adherence to the intervention will be monitored through radiological examination for stem loosening using the routine radiographs taken at post-operative visitation as part of the surgeon's standard of care.