How long does it take to heal from a tkr? « booktoots, Total knee replacement: how long does it take to heal written by richard haynes. http://physictherapy booktoots' healing. how long does it take to heal. Eight months after a total knee replacement - booktoots, Booktoots' healing. i had no idea it would take that long. hi i had a total knee replacement 5 months ago and recovered very quickly. Knee replacement challenges six months post - knee & hip, I am still having difficulty six months post tkr. back to normal physically and the complete healing of knees would take 2 total knee replacement.