Since silicone implants were pulled from the market, several studies have been conducted to determine the safety of silicone implants. Unfortunately, most of these studies conflicted with each other. Some showed that silicone implants did, indeed, correlate with higher incidence of certain diseases while other studies showed no link between the two. The first thing to know before you decide to get breast implants is what they are really like. Well, that's probably because implants can make the breast look unnaturally rounded.
Implants are half spheres.
A sphere is the shape of a ball. Normal breast shapes vary and are more parabolic. If you think back to geometry, you will remember that this is more of a U-shape. A new version has just come out. It's supposed to be more naturally shaped.