Mastopexy or breast lift surgery refers to a group of elective surgical operations designed to lessen the degree of breast ptosis (the “droop” of the breasts). Breast implants may be placed as part of the procedure, though some patients opt for mastopexy alone.

The shape of a breast is determined by its skin, its volume and by its connective tissue. Mastopexy procedures may address any of these by reshaping the skin ‘bra’, by adding volume with implants, or by altering the structure of the breast tissue.

Full breast lift
The full breast lift involves an incision along the crease underneath the breast, incisions around the areola, and a vertical incision between the areola and the base of the breast. It allows maximal change to the breast shape, at the cost of more scarring.

Modified breast lifts
Modified breast lifts use fewer incisions than the full procedure. A popular form of the modified breast lift is the Benelli breast lift. This uses only an incision around the areola. The advantage is that there is less scarring, the drawback is that there can be less change made to the breast’s shape. Benelli procedures are frequently performed along with breast augmentation, but are criticised because of the tendency to reduce projection of the breast.

Length of effects
In most cases, aging breast tissue will not maintain the shape that the mastopexy initially brought. Usually, gravity will eventually cause ptosis to return to some degree.

Via Wikipedia