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