How long after knee replacement surgery is it possible to break down scar tissue?

The amount of time it takes to break down scar tissue after knee replacement surgery can vary depending on the individual and the severity of the scar tissue. In general, it can take several months to a year or more for the scar tissue to fully break down and for the knee to return to its full range of motion. Physical therapy and massage can help to speed up the process of scar tissue breakdown.