PMID- 34817967 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - J Adhes Dent JT - The Journal of Adhesive Dentistry IS - 1757-9988 (Electronic) IP - 6 VI - 23 PST - ppublish DP - 2021 PG - 513-525 LA - en TI - Bonding Universal Dental Adhesive to Developmentally Hypomineralised Enamel LID - 10.3290/j.jad.b2288247 [doi] FAU - Lee, Yu-Lynn AU - Lee Y FAU - Li, Kai Chun AU - Li K FAU - Yiu, Cynthia Kar Yung AU - Yiu C FAU - Boyd, Dorothy H. AU - Boyd D FAU - Waddell, J. Neil AU - Waddell J FAU - Ekambaram, Manikandan AU - Ekambaram M CN - OT - bonding OT - deproteinisation OT - hypomineralised enamel OT - microshear bond strength OT - Papacarie OT - Scotchbond Universal AB - Purpose: To investigate the effect of pretreatment protocols involving Papacarie Duo gel and Scotchbond Universal (SU) on the microshear bond strength (µSBS) of resin composite (RC) to hypomineralised enamel (HE). Materials and Methods: Specimens of normal enamel (NE) and HE were derived from extracted hypomineralised first permanent molars (FPMs). Based on the colour of demarcated opacities, HE specimens were classified as creamy/white (CW) or yellow/brown (YB). The specimens were randomly allocated into eight groups (n = 20). Each group involved pretreatment with Papacarie Duo gel or no pretreatment, and SU applied in etch-and-rinse (E&R) or self-etch (SE) mode. All specimens were bonded with RC and subjected to µSBS testing. Failure modes were analysed using an optical microscope and SEM. Results: Comparing NE with HE, the following factors were found to be significant (p < 0.001): type of enamel substrate, deproteinising pretreatment, and etching mode. Comparing CW HE with YB HE, a significant interaction between “deproteinising pretreatment” and “etching mode” was demonstrated (p = 0.028). When subjected to the concurrent use of Papacarie Duo gel and phosphoric acid etching, HE specimens showed a significant increase in µSBS (p < 0.001). Conclusion: Deproteinising pretreatment using Papacarie Duo gel followed by the application of SU in E&R mode led to increased µSBS of resin composite to HE. AID - 2288247