Volar Anatomy of the Proximal Phalanx: Implications for Screw Length Selection for Fixation of Shaft Fractures

Viewed laterally, the cupped edges of the groove obscure its depth. Dorsally placed bicortical screws could protrude into the groove, remaining unnoticed on intraoperative imaging. The resulting impingement on the flexor tendon could lead to postsurgical stiffness or flexor tendon attritional rupture.