In the study group, the augmentations with silicone gel prostheses had a high rate (64 percent) of firmness (as felt by the patients), which seems not greatly affected by the surgeon or by patient exercises or manipulations. In the group, augmentations with saline-filled inflatable prostheses had a much lower incidence of firmness (40 percent, as felt by the patients). No deflations of the Heyer-Schulte R.T.V. “Jenny” prosthesis were found during the follow-up period. Augmentation mammaplasty by a certified plastic surgeon has a low rate of physical complications (in the range of one to two percent). However there were unfavorable cosmetic results causing patient dissatisfaction with part of the result in about 15 percent. The incidence of emotional dissatisfaction with the procedure as a whole, as judged by those who would not choose to repeat the operation, was less than 4 percent. © 1979 American Society of Plastic Surgeons.