Joint replacements are surgical procedures where damaged or worn-out joints, like the knee or hip, are replaced with artificial parts. This is often done to relieve pain and improve mobility for people suffering from conditions like arthritis or injuries. The new joint, usually made of metal, plastic, or ceramic, helps restore function and allows individuals to return to their daily activities. The surgery typically involves removing the damaged joint surfaces and inserting the artificial joint, which is designed to mimic the natural movement of the joint. Recovery can take time, but many patients experience significant improvements in their quality of life after a joint replacement.