Modified Posterior Trans-olecranon Approach in Tri-vision for Dubberley Type 3B Coronal Shear Fractures of the Distal Humerus

Coronal shear fractures are rare injuries and standard treatment is yet to be determined. There is still no standard approach and fixation method for Dubberley type 3B cases, which are severe fractures that extend to the ulnar side and are accompanied by posterior comminution, making them challenging injuries. We used a modified posterior trans-olecranon approach in tri-vision in the supine position in two type 3B cases. Bone union was achieved in both cases, which exhibited relatively good treatment outcomes with a mean range of motion of -20° for extension and 127.5° for flexion; mean Mayo Elbow performance score of 90; and mean disabilities of the shoulder, arm, and hand score of 20 points. Thus, a modified posterior trans-olecranon approach in tri-vision is useful for type 3B fractures.