Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The Roy-Camille classification: type I fractures show kyphotic angulation only; type II fractures demonstrate both kyphosis and retrolisthesis; type III fractures have complete anteriorlisthesis; type IV fractures characterized by severe comminution of the S1 body.
