http://articles.mercola.com/sites/articles/archive/2002/07/24/knee-surgery.aspxBy Gina Kolata An estimated 12% of Americans aged 65 and older have osteoarthritis of the knee. A popular operation for arthritis of the knee worked no better than a sham procedure in which patients were sedated while surgeons pretended to operate, researchersenCommunityServer 2008.5 SP1 (Build: 31106.3070)