In dentistry, its derivatives-bisphenol A-glycidyl methacrylate and bisphenol A dimethacrylate can be found in a resin-based dental sealant and composites. BPA is rarely used as an ingredient I n dental material but may be present as a by-product of other ingredients in dental composites or sealants that may have degraded and as a trace material leftover from the manufacturer of other ingredients used in dental composites and sealants.
The exposure to BPA from sealants is about 200 times lower than the level EPA considers safe. The EPA Level is based on daily exposure. The measurable exposure to BPA from sealants occurs one time-at the time of placement.
While the quantity and duration of systemic BPA absorption was not clear from the available data, the authors concluded that BPA exposure may be minimized by cleaning and rinsing surfaces of sealants and composites immediately after placement.
For more information about Bisphenol A visit www.ada.org/1766.aspx