Breast augmentation
The modern prosthetic breast was invented in 1961, by the American plastic surgeons Thomas Cronin and Frank Gerow, and manufactured by the Dow Corning Corporation; in due course, the first augmentation mammoplasty was performed in 1962. There are five generations of medical device technology for the breast-implant models filled with silicone gel; each generation of breast prosthesis is defined by common model-manufacturing techniques.
Cleavage (breasts)
Development of the underwire bra started in the 1930s, though it did not gain widespread popularity until the 1950s, when the end of World War II freed metal for domestic use. Aviator and filmmaker Howard Hughes designed a prototype for an aerodynamic underwire bra for Jane Russell when filming "The Outlaw" in 1941. According to Hughes, the resultant amount was "the length of the actual cleavage is five and one-quarter inches." Several brassiere manufacturers, among them Wonderbra and Victoria's Secret, produce push-up and other types of bras that enhance cleavage. Frederick's of Hollywood introduced a design called Hollywood Extreme Cleavage Bra that helped give the impression of a spherical cleavage like augmented breasts that was popularized by stars like Pamela Anderson.