Primary Article

Biomechanical Studies of an Anterior Pelvic External Fixation Frame Intended for Control of Vertical Shear Fractures

Authors: LAURENCE E. DAHNERS MD, RAE R. JACOBS MD, EDWARD B. McKENZIE MD, JEROME A. GILBERT PhD

Abstract

ABSTRACTBiomechanical testing of an experimental pelvic external fixation frame incorporating a large tubular horizontal member was carried out on formalin-fixed cadaver pelves with simulated vertical shear injuries. The device was tested with 5 mm standard and 6 mm experimental pins, and was compared to a Pittsburgh triangular (PT) frame constructed of standard Hoffmann components. Tested by vertical loading, the experimental frame with 5 mm standard pins was 1.9 times as stiff as the PT frame, and with the 6 mm experimental pins it was 2.4 times as stiff as the PT frame. Clinical trials are needed to determine efficacy in vivo.

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