Benjaporn ThanaratikulBusayarat SantiwongCholtacha HarnirattisaiChulalongkorn UniversityMahidol University2018-12-112019-03-142018-12-112019-03-142016-03-31Dental Materials Journal. Vol.35, No.2 (2016), 174-17918811361028745472-s2.0-84961989861https://repository.li.mahidol.ac.th/handle/20.500.14594/43568© 2016, Dental Materials Journal. All rights reserved. This study evaluated the microshear bond strength (μSBS) of resin composite to primary dentin using a universal adhesive in etchand- rinse mode or self-etch mode. Flat ground dentin surfaces were created on forty extracted human primary incisors and randomly assigned into four groups (n=10): Adper Single Bond II (ASB), Clearfil SE Bond (CSE), Single Bond Universal etch-and-rinse (SBUER) and Single Bond Universal self-etch (SBU-SE). Adhesive was applied on the dentin surface, which was subsequently bonded with a resin composite. The μSBS test was performed using a universal testing machine at a crosshead speed of 1 mm/min. The ASB group generated a lower mean μSBS (19.1±3.4 MPa) than those of the other groups [SBU-ER (24.3±2.7 MPa), SBU-SE (25.1±2.4 MPa), and CSE (25.3±2.7 MPa)]. Adhesive failure was the most common failure mode in each group. In conclusion, SBU used in etch-and-rinse or self-etch mode resulted in similar bond strength to primary dentin.Mahidol UniversityDentistryMaterials ScienceArticleSCOPUS10.4012/dmj.2015-109