I had tkr in 2021 the surgeon put knee that was 2-3 sizes too big was never able to gain or keep flexion …. My new dr seen first dr mistake had a revision 1 year later now 0 and 100 the difference is I keep what flexion I gain …. I still deal with scar tissue because of having to have two surgeries , and having wrong parts in for a year …so I hear you tough with that flexion to function…..good luck whatever you choose