Butterfly Fracture

A fracture, typically of long bones, in which the centre fragment is triangular. A butterfly fracture of the pelvis is one in which there is an X, the centre of which comprises the symphysis pubis which is detached by four fractures
References in periodicals archive ?
Interpreting injury mechanisms of blunt force trauma from butterfly fracture formation.
Assessing impact direction in 3-point bending of human femora: Incomplete butterfly fractures and fracture surfaces.
(1986) noted smoother fracture surfaces on the transverse section of butterfly fractures, while those surfaces after the bifurcation displayed a rougher surface indicating higher energy.
The causes and mechanisms of butterfly fractures tend to be oversimplified (or in some cases misinterpreted) in forensic anthropology and forensic medicine literature, often including broad claims of force directionality based on the orientation of the wedge, but wedge shape and orientation are often insufficient to thoroughly understand the mechanisms of failure.