Description of a rare type of posterior pelvis traumatic involvement: the green-stick fracture of the sacrum

Fractures of the pelvic ring in children behave differently than in adults. In children, bone elastic properties allow for plastic deformation instead of complete breaks. To the best of our knowledge no reports of this bony b ehavior have been described in the sacrum, and this could explain the prese nce of single displaced anterior breaks without evident posterior pelvic di sruption. The objective of this paper is to document a rare type of posteri or pelvis trauma: the green-stick fracture of the sacrum.