In the medical world, the fat-injection procedure is known
as autologous fat transplantation or microlipoinjection. It
involves extracting fat cells from the patient's abdomen,
thighs, buttocks or elsewhere and reinjecting them beneath
the facial skin. Fat is most often used to fill in "sunken"
cheeks or laugh lines between the nose and mouth, to correct
skin depressions or indentations, to minimize forehead wrinkles
and to enhance the lips.
As we age, our faces begin to show the effects of gravity,
sun exposure, years of facial muscle movement - such as smiling,
chewing and squinting. The underlying tissues that keep our
skin looking youthful and plump begin to break down, often
leaving laugh lines, smile lines, crow's feet and facial creases
over the areas where this muscle movement occurs.
Soft-tissue fillers, like fat, can help fill in these lines
and creases, temporarily restoring a smoother, more youthful-looking
appearance. When injecting beneath the skin, fat plumps up
creased and sunken areas of the face. It adds fullness to
the lips and cheeks. Fat may be used alone or in conjunction
with a resurfacing procedure or a facelift.