Fig. 1. Schematic drawing showing measurement of the maximum ulnar bow (MUB) and the location of MUB. A straight line is drawn along the dorsal border of the ulna from the level of the olecranon to the distal ulnar growth plate. MUB is the maximum perpendicular distance from this straight line. Distance A is the length of straight line; the distance B is the length from the distal ulnar growth plate to the point of MUB of straight line. The location of MUB represents as a percentage of B/A.
