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. Author manuscript; available in PMC: 2008 Feb 15.
Published in final edited form as: J Dent Res. 2006 May;85(5):422–426. doi: 10.1177/154405910608500505

Figure 4.

Figure 4

Degradation mechanisms of 4-MET from the UniFil Bond Primer consist of initial esterification with ethanol and subsequent hydrolysis into methacrylic acid, ethyl methacrylate, and 1-ethyl- or 2-ethyl-4-(2-hydroxyethyl)-trimellitate, which is further hydrolyzed into ethylene glycol and trimellitic acid.