10/03/2025
🦴 What Is Hip Replacement with Metal?
Hip replacement (also called total hip arthroplasty) is a surgery where a damaged hip joint is replaced with an artificial implant. In a metal-based hip replacement, parts of the implant are made of metals such as titanium, cobalt-chromium, or stainless steel. These metals are chosen because they are:
• Strong enough to support body weight.
• Resistant to wear and corrosion.
• Biocompatible (well tolerated by the body).
The implant usually has:
• Metal stem (inserted into the thigh bone/femur).
• Metal or ceramic ball (replacing the head of the femur).
• Plastic, ceramic, or sometimes metal cup (in the hip socket).
⸻
⚙️ Types of Metal Hip Replacements
1. Metal-on-Polyethylene (MoP)
• Metal ball + plastic socket.
• Most common and reliable type.
2. Metal-on-Metal (MoM)
• Metal ball + metal socket.
• Less common today because it can release tiny metal ions into the bloodstream, sometimes causing complications.
3. Metal-on-Ceramic
• Metal stem + ceramic ball + ceramic or plastic socket.
• Combines strength with smoother motion.
⸻
✅ Benefits
• Long-lasting durability (often 15–20+ years).
• Strong enough for active patients.
• Titanium versions are lightweight and bond well with bone.
⸻
⚠️ Risks and Considerations
• Infection, blood clots, dislocation, or fracture (general surgical risks).
• Metal sensitivity or allergy (rare).
• Metal ion release (especially in metal-on-metal types, which are less used today).
• Loosening over time, sometimes requiring revision surgery.
⸻
🏥 Recovery & Outlook
• Hospital stay: usually 1–3 days (sometimes same-day discharge in newer protocols).
• Walking: often within a day with a walker or crutches.
• Full recovery: about 3–6 months.
• With care, many patients return to normal daily activities, work, and even sports like swimming, golf, or cycling.