The medial surface is inclined compared to the epicondylar axis and posterior condyle, usually resulting in plate positioning that is parallel to the placement surface. The optimal screw insertion from the anterior to posterior was generally achieved; however, there was still room for posterior angulation margins of 9-11° for A- and C-screws and approximately 27° for the B-screw. In contrast, the lateral surface is flatter with less inclination, causing anterior plate placement and wider posterior angulation - approximately 16-18° for A- and C-screws and 30° for the B-screw - allowing a greater range of posterior swing than the medial side.
Kawashima et al. (Thu,) studied this question.