Info from McGlamry's Foot and Ankle Surgery, 5th edition.
What is the avg range of the talocrural angle in degrees?
83 ± 4 degrees
As little as 1 mm of lateral talar translation has been reported to decrease the tibiotalar contact area by what percent?
42%.
What should the tib fib clear space measure less than on the AP and mortise radiographs?
< 6 mm