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Effects of dentin bonding agents on bonding durability of a flowable composite to dentin
Ki-Young Nam1, Jong-Bae Kim, Byeong-Churl Jang
1Department of Dentistry, College of Medicine, Keimyung University, 194 Dongsan-dong, Jung-gu, Daegu 700-712, Korea. nykp@dsmc.or.kr
Abstract:
The present study evaluated the bonding durability of a flowable composite on bovine dentin using dentin bonding agents with different numbers of application steps: Scotchbond Multipurpose (three steps), Prime & Bond NT and One-Step (two steps), AQ Bond and Prompt L-Pop (one step). Shear bond strength tests were performed, and resin-dentin interface and fracture mode were observed. There were no significant differences in bond strength among the specimens within 37 degrees C storage group (p > 0.05) and post-thermocycling group, except between Prompt L-Pop and Scotchbond Multipurpose (p < 0.05) in the post-thermocycling group. Further, Scotchbond Multipurpose and One-Step showed significantly lower bond strengths after thermocycling (p < 0.05). It was thus shown that the use of simplified bonding agents did not necessarily improve the bonding strength of flowable composites.
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