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. 2012 Jun 26;21(9):1815–1825. doi: 10.1007/s00586-012-2406-9

Fig. 1.

Fig. 1

a Denis et al. [2] classification shows the three zones of longitudinal sacral fractures. b Roy-Camille et al. [3] classification shows the three types of combined longitudinal and transverse sacral fractures and the 4th type modified by Strange-Vognsen and Lebech [4]