Three-Dimensional Analysis of Acute Scaphoid Fracture Displacement: Proximal Extension Deformity of the Scaphoid

Conclusions:
In acute displaced scaphoid fractures, it is the proximal fragment that displaces and should be reduced.

Clinical Relevance:
The typical "humpback" deformity is actually a "proximal extension" deformity, the consequence of displacement of the proximal fragment of the scaphoid (with the lunate). Manipulating only the proximal fragment (with the lunate) may be technically easier and more effective than manipulating both fragments.

Source: JBJS - January 17, 2017 Category: Orthopaedics Authors: Schwarcz, Y., Schwarcz, Y., Peleg, E., Joskowicz, L., Wollstein, R., Luria, S. Tags: Basic Science, Hand & Wrist Scientific Articles Source Type: research