Dear Breadpuding, EVL (expansion vibration lipofilling) is the method of transferring the fat into to the body, in this case buttocks via a vibration cannula like it can be used for power assisted liposuction. This is a safer method to transfer larger volumes of fat just in the subcutaneous tissue of the buttock. So no fat is transferred into the buttock muscle, since there is more risks of fat embolism injecting into the muscle.
Whether power assisted liposuction is used as well for the liposuction, depends, I prefer to do a water jet assisted liposuction since I believe the fat quality is better doing so.
for more information http://drhamers.es/en/?project=brazilian-butt-lift-buttock-augmentation-bbl&lang=en
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