SUNDAY, March 26 (HealthDay News) — For the estimated three million American women with breast implants, one thing remains certain: At some point, they will need to be replaced or removed.

Breast implants do not last forever — whether they are filled with silicone gel or saline, or whether they were done to reconstruct a breast after a mastectomy or to augment the size or shape of a breast.

Knowing just when that time has come, however, and what to do if you suspect it has, is not always simple.

Sonia student loan calculator Fuentes, 77, of Potomac, Md., a retired attorney and co-founder of the National Organization for Women, encountered that conundrum last year when she suspected problems with the silicone-gel implant she had gotten 15 years earlier after a mastectomy. She thought it had hardened and gotten smaller and feared it was leaking.

She consulted her oncologist, the surgeon who had performed the mastectomy and the plastic surgeon who had performed the implant, and she also scrolled the Internet for background. But opinions and advice were conflicting:

• Get a mammogram to see if the implant has ruptured, one doctor suggested.
• Don’t get a mammogram, a women’s Web site warned, as the compression could cause the implant to break.
• Have an MRI, the FDA urged on its site, noting that that’s the best way to detect a rupture.
• An MRI wasn’t necessary, another doctor told her.

“The quality of advice people get is very spotty,” said Dr. Scott Spear, chief of plastic surgery at Georgetown University Hospital in Washington, D.C., and immediate past president of the American Society of Plastic Surgeons.

So what’s a woman to do?

Anyone concerned about an implant should “start off by seeing a doctor, a plastic surgeon” preferably, Spear said. If the original surgeon cannot be reached or the woman is uncomfortable with the surgeon’s opinion, he recommended going to a clinic that specializes in implants or finding a plastic surgeon associated with a university.

That’s when Fuentes’ saga really began. First she consulted the doctors who had treated her initially. “All of these doctors are top guys,” she said. “I had a lot of respect for them.” But, she said, two of them “said to me, ‘Your breast hasn’t changed,’ ” which she considered “a little presumptuous.”

She also was not comfortable with their nudging her to have a mammogram, given what she had read on the Internet and heard from friends.

“You’ve got to learn to go with your gut,” Fuentes said. “But so many women, if a doctor tells them something — that’s it.”

Fuentes insisted on an MRI, her doctor relented, and the MRI revealed a ruptured implant.

She asked a plastic surgeon in Cleveland to remove the implant, replace it with a saline version and reconfigure her breasts to ensure symmetry. But she said the surgeon insisted on an ultrasound of the implant beforehand, an option no one else had proposed. It, too, showed a rupture, and the surgery went on as planned.

Dr. companies Michele Shermak, chief of plastic surgery at Johns Hopkins Bayview Medical Center in Baltimore, said she also uses ultrasound to evaluate implants.

“A mammogram, like any plain film X-ray, is not good at seeing soft-tissue problems,” Shermak explained.

For detecting breast cancer, the American Cancer Society recommends regular mammograms, and Shermak indicated that advice should apply to women with and without implants. “Compression should not be a problem” for women with implants, she said.

But for detecting possible rifts in an implant, “mammograms are really not the best way to go,” she said.

“Ultrasound is usually the first test that I’ll do,” Shermak said. She described it as “easy technology&q