Prosthetic joint lubrication

Artificial hip and knee replacements need lubrication just like mechanical parts, but instead of oil, they rely on your body's natural synovial fluid. Modern prosthetics use ultra-smooth materials like ceramic or highly polished metal that create 10 times less friction than ice sliding on ice, allowing the joint to glide with minimal wear. Engineers study how different material combinations interact with body fluids to design joints that can last 20-30 years despite millions of walking cycles. Some newer implants even have textured surfaces that help the body's natural lubricant spread more evenly, mimicking how healthy cartilage works.