Oklahoma Pit and Fissure Sealants State Practice Exam

Which component in sealant materials is known to release BPA?

1. Bis-GMA

2. HEMA

3. TEGDMA

4. Urethane dimethacrylate

The correct answer is: Bis-GMA

The component in sealant materials that is known to release BPA (Bisphenol A) is Bis-GMA (Bisphenol A glycidyl methacrylate). Bis-GMA is a widely used resin in dental materials, particularly in composite resins and sealants, due to its favorable mechanical properties. The structure of Bis-GMA includes BPA in its formulation, which contributes to its strength and stability but also raises concerns regarding the release of BPA during the use of dental products. Understanding the role of these components is crucial in dental practice, especially in terms of patient safety and material performance. While other substances like HEMA, TEGDMA, and urethane dimethacrylate are commonly used in dental materials, they do not contain BPA in their structure and are not associated with the release of this compound. This distinction is essential for practitioners who are concerned about the potential endocrine-disrupting effects of BPA and need to choose materials accordingly in their practice.