Another statement from B.L.Eppley:
"The problems with demineralized bone or hydroxyapatite granules for cheek augmentation, or any location of facial bone augmentation, is the inconsistency of the shape that results. Granular materials will have a tendency to clump or become lumpy and not have the smooth contour that a preformed implant does. It may work successfully for small areas of cheek augmentation but is not reliable for larger or more anterior cheek locations."