Fat transfer to the face is typically used for broad correction to the face, such as cheeks, mentum, mandible, and forehead. This requires large volumes of adipose tissue that can only be obtained via liposuction. Therefore, this is an excellent approach for someone who wants a liposuction procedure to other areas of the body. Using the same volume with dermal fillers has two problems: one is the amount of a foreign agent being introduced to the body all at once; and two, the expense of equal volume will require several syringes of dermal fillers which costs tens of thousands of dollars. This would not be practical.
In contrast, dermal fillers are used in small amounts, less than three syringes per treatment. They address fine corrections in targeted areas of the face, such as the tear trough, nasolabial folds, marionette lines, and lips. The cost of each syringe depends on the type of filler needed.