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Structure and proposed reaction of BisGMA-methacryloyl overlayer in the presence of water. Hydrolysis of resin ester bonds caused degradation products of BisGMA to appear, indicated by the solid arrows. Dehydration of the BisGMA – 2MA also occurred, leading to the loss of one equivalent of water with each reaction. Potential hydrolysis reactions that did not lead to observed products are indicated by broken arrows.
