What is the difference between arthritis and arthroplasty?

Arthritis means inflammation of a joint, from arthr meaning joint and itis meaning inflammation. There are over 100 types, with osteoarthritis being degenerative wear and tear and rheumatoid arthritis being an autoimmune condition. Arthroplasty means surgical repair or reconstruction of a joint, from arthr meaning joint and plasty meaning surgical repair. Total hip arthroplasty and total knee arthroplasty are common joint replacement surgeries for severe arthritis.