There is no current evidence that there is any additional health risk to a woman who has silicone implants versus saline implants. The FDA at one time placed a restriction on the use of silicone implants for cosmetic breast enlargement because they were unsure if there was any health risk associated with silicone implants. They were never removed from the market. Silicone implants could just not be used for pure cosmetic breast enlargement. There was no restriction on their use for breast reconstruction, provided the proper documentation was carried out.
The restriction of cosmetic use of silicone implants was lifted after years of study of women who already had silicone implants and women who received silicone implants after the restrictions were placed. The restriction was lifted at the recommendation of the review board because they could find no safety issues related to the use of silicone implants compared to saline implants. Specific information about the studies and further links may be found at Silicone Breast Implant Safety
Now any woman 22 years of age or older may have the option of silicone implants if she wishes.