There are three general types of breast implant devices, defined by their filler material: saline solution, silicone gel, and composite filler.
The saline implant has an elastomer silicone shell filled with sterile saline solution during surgery; the silicone implant has an elastomer silicone shell pre-filled with viscous silicone gel; and the alternative composition implants featured miscellaneous fillers, such as soy oil, polypropylene string, etc.
The Cronin–Gerow Implant, prosthesis model 1963, was a silicone rubber envelope-sac, shaped like a teardrop, which was filled with viscous silicone-gel. Food and Drug Administration concluded that TDA-induced breast cancer was an infinitesimal health-risk to women with breast implants, and did not justify legally requiring physicians to explain the matter to their patients.
Nonetheless, in the 1990s, the saline breast implant was the prosthesis most common device used for breast augmentation surgery in the United States, because of the U. FDA’s restriction against the implantation of silicone-filled breast implants outside of clinical studies.
Saline breast implants have enjoyed little popularity in the rest of the world, possessing negligible market share.
In 1895, surgeon Vincenz Czerny effected the earliest breast implant emplacement when he used the patient's autologous adipose tissue, harvested from a benign lumbar lipoma, to repair the asymmetry of the breast from which he had removed a tumor.
In 1889, surgeon Robert Gersuny experimented with paraffin injections, with disastrous results.
The contemporary models of saline breast implant are manufactured with thicker, room-temperature vulcanized (RTV) shells made of a silicone elastomer.