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					Originally Posted by Douglas Gilbert  I have had both replaced. Right one about 11 years ago, Posterior. It has come apart on me 3 x. Hurts like hell when that happens. Rehab was long and hard.
 left one I had done 5 years ago, Anterior. Rehab much shorter and easier. Ifg you must have it done choose this.
 
 It's not a picnic. I can not walk to the back of a big box store and back without extreme pain. I am unable to exercise so I have lost all muscle tone. But then I am 74.
 
 Good luck to you and please shop around for the surgeon.
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 What was the cause of it coming apart? I had mine done( posterior) last spring and haven't had any trouble at all. I was fishing in 8 weeks and duck hunted with no problems. Just curious.