No...injections are used to replace fluid inside the joint and may be able to put off the need for a knee replacement, depending on the type and extent of damage you have. A total knee replaces the joint itself, and has to be done through the removal of the existing joint and replacing it with an artificial alternative. That can't be done through needles, or even laparoscopically at this point.
no it's a pretty invacive proceedure. Recovery time varies from paitent to paitent . but it is well worth, it the pain and swelling i was experiencing prior to surgery has disipated there is still some pain from healing but it is nothing like it was prior to the surgery.