Even though I am a dentist, I cannot get a straight answer about BPA and dentistry from anyone. I’ll try here:

As pointed out in the article, BPA is on the chopping block. Exposure to the chemical allegedly leads to as many diseases as exposure to mercury. Here is what keeps life in this nation interesting: Because of heightened fear of mercury poisoning, including a new FDA investigation into the toxicity of dental amalgams, many people are replacing their silver fillings with composite fillings, which unfortunately contain BPA.

Early in the beginning of the scare, on a few venues it was mentioned that dental sealants contain BPA. That is hardly mentioned at all any more, and it was not mentioned in the article here. I have news. It is not only in sealants and composites, but it is also used to help hold orthodontic brackets, as well as veneers to teeth. It is in dentures. Nightguards. Orthodontic retainers. Bleaching trays - if it is not metal or porcelain, it is plastic and it contains BPA. It is even in the handle of your toothbrush, as well as the bristles.

Within the last few days, an article came out in the FDA News in which Rep. Rosa DeLauro from Connecticut urges the FDA’s Science Board to expand its inquiry of BPA to include medical devices. That means dental materials and toothbrushes.
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Since dental plastics are in contact with a person 24 hours a day and immersed in saliva - are sometimes doused with alcohol and heated with hot liquids and gasses, and since microscopic chunks of the plastic are always being swallowed, I doubt that DeLauro will let those devices slip by if popular opinion says that baby bottles are dangerous.

So let me see if I understand this correctly: If Congresswoman Diane Watson of California is successful in outlawing dental amalgam, and if Sen. Chuck Schumer of NY is successful in outlawing BPA, there is a real possibility that it could soon be illegal for dentists to fill teeth at all. What then? Do I just turn out the light and go home? Darrell Pruitt DDS

Good info on BPA is hard to find. I've heard little about a ban affecting fillings. It could have silver lining if it does...a bpa-free filling would be very marketable.
More info on BPA:

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There is a BPA-free filling material. It is called amalgam.

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