Hi everybody. My understanding is that pressure on the meniscus of a healthy knee joint causes the production of joint-lubricating synovial fluid. My impression is that in the absence of cartilidge, i.e., in a totally replaced knee joint, this synovial fluid is no longer present, and that the joint is essentially "dry", or, at most, perhaps immersed in some other type of bodily fluid. However I recently read something somewhere (I can't remember where--"old timer's disease") that synovial fluid may still be present to help lubricate an artificial joint. Does anybody have any information on this that they could share?