Fig. 1.

Walker's classification; type I: horizontal sagittal split, type IIa: medial distal avulsion, type IIb: medial proximal avulsion, type III: lateral distal avulsion, type IV: vertical sagittal split, and type V: communitive.

Walker's classification; type I: horizontal sagittal split, type IIa: medial distal avulsion, type IIb: medial proximal avulsion, type III: lateral distal avulsion, type IV: vertical sagittal split, and type V: communitive.