Increase the gluteal region is possible either by silicone implants and / or fat transfer.
But both techniques have difference.

Fat transfer is a safe technique, indicated to fill in selective areas of the gluteal region, where often the simple gluteal prosthesis fails to fill, as the lateral trochanteric depression to (this depression resembles female tail in a male) tail and also at the lower section of the gluteal region.
The transfer is done in multiple planes, especially subcutaneously. But keep in mind that up to 20% can reabsorb the fat and must return to a new lipofilling.
Lipofilling achieved as fill these areas, but can never achieve GLUTEOS firm and round as those produced by gluteal prosthesis.