Implants are basically available in two kinds of shapes: round and contoured. The first is self-explanatory. Contoured implants - sometimes called anatomical implants - were originally designed for reconstructive purposes, and more recently have been used for breast augmentation. They are "bottom-heavy," meaning that because of their conical shape more of the volume is distributed to the bottom when held upright. Contoured implants can turn or flip in the pocket, so they are usually implanted in a textured form to maintain their position. Pictured here: a contoured implant on the left and a round implant on the right.
