According to the product information from one of the sealant's own informational websites, in an article entitled "Resin Dental Sealants and Bisphenol a Oral Exposure," in 1996 concerns about the safety of dental sealants were raised by researchers University of Granada in Spain when they discovered detectable levels of bisphenol a (BPA) in the saliva of patients treated with dental sealants, although they later found that the highest reported exposure to BPA was still 50,000 times lower than levels that were poisonous to animals. Clearly, are sealants superior to the far more questionable materials they were designed to replace, namely mercury amalgams. Also, cavities can cause structural damage to the teeth, and must be replaced after 6 to 8 years, thus sealants, in a cost-benefit analysis to the patient, seem to be the more desirable option, as opposed to not sealing a potentially problematic tooth (Saunders 2005). However, sealants in healthy teeth in young children may remain slightly controversial. Some dentists suggests sealing all erupted adult molars in children, while others advocate only sealing teeth that seem likely to provide areas for bacteria and decay to fester...

But given the relatively demonstrated minimal risk, the benefits of preventative coverage provided by sealants will hopefully be used by patients that can avoid much more costly, lengthy and dangerous dental surgery later on by using sealants.
Works Cited

Neuenfeldt, Ellen S. (Sept-Oct 2005). "Sealants: basic information, advanced technology." The Dental Assistant. Retrieved 25 Jul 2007 at http://findarticles.com/p/articles/mi_m0MKX/is_5_74/ai_n15777173

Resin Dental Sealants and Bisphenol a Oral Exposure." (2007).

BisphenolA. Human Health and Safety -- Product Safety. Retrieved 25 Jul 2007 at http://www.bisphenol-a.org/human/dental.html

Saunders, John. (2005). "Protecting your Child's Teeth." Medical University of South

Carolina Retrieved 25 Jul 2007 at http://etl2.library.musc.edu/sealants