Are there any tooth-coloured materials that are free of BPA and estrogen-mimicking agents?
This question was submitted by a general dentist: My patient requests that her tooth-coloured restorations be free of BPA and estrogen-mimicking agents. Can you suggest any tooth-coloured materials and cements that meet those criteria?
Dr. Omar El-Mowafy, Professor and Head of the Restorative Dentistry at the University of Toronto, provided this quick initial response:
Bisphenol A (BPA) is an organic compound with the chemical formula (CH3)2C(C6H4OH)2. It is widely used in the industry when making plastic products.
Tooth-colored restorations that are Bisphenol-A-free would automatically exclude almost all resin composite restoratives and their corresponding bonding agents. Therefore, in this case the choices would be limited to glass ionomer restoratives (in case of Class 3 or 5 direct restorations) or indirect restorations made with porcelain products (inlays, onlays and crowns) and cemented with glass ionomer cements. Some of the newer porcelain products, such as zirconia-based ones and ones based on lithium disilicate, are adequately strong to the point that a glass ionomer cement would work well with them without the risk of pre-mature fracture.
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