The classic: complete replacement arthroplasty of the hip by the ring prosthesis. 1988.
Ring
P A
PA
D019644:Arthroplasty, Replacement, Hip / Q000266:history*; D006622:Hip Prosthesis / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D008131:London; D009985:Orthopedics / Q000266:history*