I will be having scar tissue removed in Jan 2013. I had TKR in 12/2011, 2 mup. Never gain full extension and about 75 range of motion. It seems after each mup the knee would lock up at the 2 week period. My dr says that he will over extend the knee and will be in a brace for 8 weeks to keep the leg straight except when doing pt. Has anyone else have this much problems after TKR.