I am 68 years old facing knee replacement surgery am i too old for this to be beneficial.

No: Most recipients of total knee replacements are in there 60s and 70s. The 4 main considerations are whether your quality of life is affected significantly enough to warrant a knee replacement in your own opinion; secondly if you have failed attempts to get you better non- operatively; thirdly if there are any medical contra-indications; and finally if you are a candidate for one.