I got almost same problem. dislocated elbow, after several appointments with medical staff, I still have a extension deficit around 20degrees. Problem is, I need fully extensions for my weightlifting. 

I checked out the videos did some vodoo bands even with the dice, directly after vodoo band and dice and the green band elbow stretch, there is a deficit about 0-5degrees for about 10minutes, but after that, still got the stiffness and deficit.

Do you got any other ideas of how to fix a extension deficit? Would be really thankful for all of your help!

Cedi