To be successful and recover full use function they want you to be able flez fla and Ben’s 120 to the max 130 degrees. I was stck at 90 and unable to ride a bicycle for example. Couldn’t complete a full circle revolution with it. Healed too fast.
They knock you out, force it to bend fully to 130, breaking out the scar tissue bthen you resume daily abbreviated physical therapy until it stops trying to tighten up. A year or more?