Sir John Charnley, CBE, FRS, was an English orthopaedic surgeon. He pioneered the hip replacement operation and created the Wrightington Centre for Hip Surgery. He also demonstrated the fundamental importance of bony compression in operations to arthrodese (fuse) joints, in particular the knee, ankle and shoulder.
Charnley influenced generations of orthopaedic surgeons through his textbook on conservative fracture treatment, which was first published in 1950.