These researches conclude that the very small possible benefit from surgery for knee arthritis is not worth the risks of the surgery which include deep venous thrombosis, pulmonary embolism, infection, and death. This is from a new systematic review of 9 previous studies published in the British Medical Journal. 
We are finding that many spine and joint surgeries give less benefit than previously thought.
Do you think it might be more rational to start out with more conservative procedures such as chiropractic or physical therapy?

Arthroscopic surgery for degenerative knee: systematic review and meta-analysis of benefits and harms