Prosthesis are devices that replace missing body parts or improve the function of existing parts. They are made of materials like metal, titanium, stainless steel, ceramic, or plastic. Some prosthesis are cemented into place while others allow bone to grow into the implant. Regular physical therapy is needed after a joint replacement to restore motion and function. Prosthesis users should see a prosthetist every six months for checkups and do daily maintenance like washing the limb, checking for skin issues or pressure points, using sunscreen if exposed, and seeing a doctor right away if any infections occur.