THR vs THA: What’s the Difference? You might have heard doctors or reports mention both THR and THA when talking about hip replacement surgery. But are they different? Short Answer: No — they mean the same thing. ✅ Full Forms: • THR: Total Hip Replacement • THA: Total Hip Arthroplasty 🩻 So Why Two Terms? • “Arthroplasty” is the medical term for joint replacement • “Replacement” is the more commonly used term in everyday language Doctors often use THA in clinical notes and surgical descriptions,