The reason that a 60% buttock volume retention is published on the internet is because most techniques used to harvest the fat graft are suboptimal. For example, the added force required to harvest fat cells with traditional liposuction techniques results in unnecessary damage to the fat cells. Another example, involves use of the Laser liposuction technique(marketed as Smart Liposuction) that results in directly piercing the fat cells. As a result, it is not unreasonable to appreciate why a 60% volume retention is published on the internet.
Instead, the Ultrasound energy of Vaser liposuction gently loosens the fat cells so that they can be siphoned off with minimal trauma. This results in 90 plus % viability of the fat cells. This means that what you see is what you get permanently.