The FDA said it had no opinion on whether these Sientra implants are better or worse than the ones already on the market, and the agency said it did not conduct tests to compare different kinds of implants. But FDA officials told "Nightline" that Sientra's eight-year clinical trial with the Sientra implants, which tested the product on nearly 1,800 women, showed that the implants were safe and effective.
Although Stevens swears by what he calls the "gummy bear" implants, other plastic surgeons don't. Dr. Garth Fischer is one of the top plastic surgeons in Beverly Hills and a consultant on the ABC TV show "Extreme Makeovers." His clientele includes several celebrities -- he's the plastic surgeon Bruce Jenner turned to correct several bad face-lifts done by other surgeons. Fischer also fixed Lisa Rinna's lips.
Fischer said while he sees the benefits of the "gummy bears," he prefers the conventional round implants, and suggested that surgeons who don't have his skills may use the "gummy bears" as a crutch.
"'Gummy bears' have been around a long time," he said. "[But] I think some doctors need that shape maybe because they can't create it on their own."
Dr. Robin Yuan is another prominent Beverly Hills plastic surgeon and the author of "Behind the Mask, Beneath the Glitter," a guide for patients considering a surgeon. He acknowledged that it can be confusing for patients, especially when doctors sell one technique over another, and patients have little basis to judge which approach is best for them.
"You can't say a Rolls Royce is better than a Ferrari," he said. "They're both cars that get you from A to B but they have different characteristics."
"I think there are very few patients who go to a neurosurgeon and ask what drill they're going to use to open their skull," Yuan said. "But they ask that of plastic surgeons. Most of the time, in other professions, they just trust the doctor to do what's appropriate in certain conditions."
Whether patients are considering the "gummy bears" or something else, the bottom line is to find a doctor you trust.