The ring total hip replacement.
D000077:Acetabulum / Q000601:surgery; D000368:Aged; D001178:Arthroplasty; D005270:Femur Head / Q000601:surgery; D006621:Hip Joint; D006801:Humans; D007595:Joint Prosthesis; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery*