Breast implants have their advantages and disadvantages, and so does fat grafting. The question may not be which option is better overall but which is ideal for you based on your needs and desired outcome.
Some of the advantages of fat grafting for breast enlargement include:
The process uses your own body fat, so there's no chance of rejection.
Using your own body fat means that your surgeon sculpts a part of your body, such as your abdomen.
The results of fat grafting can last indefinitely with no need for revision later on, as is necessary with breast implants.
Recovery may be shorter and more comfortable.
Some of the disadvantages of breast augmentation using fat grafting include:
Size limitation. We generally expect an increase of one to two cup sizes using fat grafting. More enlargement is possible but would require a second surgery, possibly months after the first.
Possibility for deflation. Using fat cells for breast augmentation could involve some unpredictability. If you gain weight, your breasts may enlarge even more. If you lose weight, the fat cells in your breasts could shrink, leading to deflation.