Editing Breast augmentation (section)

====Third and fourth generations====
In the 1980s, the third- and fourth-generation implants were stepwise advances in manufacturing technology, such as [[elastomer]]-coated shells that decreased gel bleed (filler leakage), and a thicker, increased-cohesion filler gel. The manufacturers of implantable breast prostheses then designed and made anatomic models (like the natural breast) and "shaped" models, which realistically corresponded with the breast and body types of actual women. The tapered models of breast implants have a uniformly textured surface, to reduce rotation of the prosthesis within the implant pocket; round models of breast implants are available in both smooth-surface and textured-surface models, as rotation is not an issue.