This article reviews a series of biomechanical studies performed in th
e author's laboratory, evaluating the instabilities produced by the mo
re common and problematic pelvic ring fracture patterns and the increa
singly popular and newly developed modes of internal fixation. Topics
that are discussed include the following: anteroposterior compression
injuries and the disrupted sacroiliac joint; sacral fractures; anterop
osterior compression injuries and symphyseal fixation; new symphyseal
plate designs; unstable pubic rami fractures; unstable fractures of th
e iliac wing; and resuscitation fixator biomechanics.