The author's practice has identified a common but little recognised cause of knee osteoarthritis (knee OA), and in 2004 he devised an arthroscopic treatment option called arthroscopic cartilage regeneration facilitating procedure (ACRFP) that has, without using artificial knees, (1) relieved thousands of patients of their knee pain without using analgesics, (2) helped open up the joint space in their knees, and (3) improved their mobility. The ACRFP...