Total Hip Arthroplasty (THA) is a procedure commonly performed in patients who have end-stage hip osteoarthritis. Patients who are planned to undergo THA surgery and fit the eligibility criteria will be considered for enrollment in this study. Each participant will receive the new hydroxyapatite coated Quadra-P femoral stem together with either the Mpact or Versafit cementless acetabular component articular systems, as part of routine treatment for total hip replacement procedures. These devices