If your mother is in reasonable health, a knee replacement is not out of the question. Seek an opinion from an orthopedic surgeon in your area, who has lots of experience with total knee replacement.
Osteoarthritis – Beyond Pain Management
My mom is 80 years of age. Her right knee is bone on bone. She loves to be active, however the pain will not allow her to. Shots help, but does not take away the pain. At her age, what other options are out there for her?