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1Principles

Long oblique head fracture of the proximal phalanx – Lag screw fixation

Fracture length

These frequent fractures are usually best treated with lag screws. A minimum of two screws must be used which necessitates that the fracture length is at least twice the diameter of the phalangeal bone. In case of a shorter fracture line, a single lag screw and a protection plate must be used.

A good rule is the following:
The fracture line (B) should be at least twice the length of the diameter of the phalangeal diaphysis (A), i.e. B >= 2A.