A Prospective, Pre-market, Multi-center Study of Insignia Hip Stem in THA to Determine Implant Survivorship and PROMS.

This study follows patients who receive the Insignia Hip Stem, a new cementless hip implant, during total hip replacement surgery. The goal is to track how well the implant lasts over time and measure patient-reported outcomes like pain and mobility. **You may be eligible if...** - You have joint disease that requires a primary (first-time) total hip replacement, such as osteoarthritis, avascular necrosis, or rheumatoid arthritis - You are a candidate for a cementless hip replacement - You have signed informed consent and are willing to attend follow-up visits **You may NOT be eligible if...** - You have an active or suspected infection in or near the hip - You have a mental or neuromuscular disorder that would make the hip implant unstable - You have poor bone quality that cannot support the implant - You are on long-term high-dose steroids that suppress your immune system - You are involved in an active Workers' Compensation case - You are known to be sensitive to the implant materials Talk to your doctor to see if this trial is right for you.