Iranian Dental Association Journal of Iranian Dental Association 3060-8201 35 1-2 2023 01 01 Microshear bond strength of two types of universal adhesives to primary dentin using self-etch and total-etch techniques 1 6 10.34172/jida.A-10-1-988 EN Yasaman Rezvani https://orcid.org/0000-0002-1940-6436 Amir Ghasemi https://orcid.org/0000-0002-5836-2149 Ayda Bagheri Hariri https://orcid.org/0000-0003-2070-5481 Leila Eftekhar https://orcid.org/0000-0001-6285-1511 Journal Article 10.34172/jida.A-10-1-988 2023 01 07 2023 04 20 Background and Aim: This study aimed to compare the microshear bond strength (µSBS) of two types of universal adhesives to primary dentin following self-etch (SE) and total-etch (TE) techniques. Materials and Methods: In this in vitro experimental study, 50 extracted sound primary first and second molars were randomly assigned into five groups (n=10). The groups were treated as follows: All Bond Universal (ABU) using the self-etch (SE) technique, Scotchbond Universal (SBU) using the SE technique, ABU using the total-etch (TE) technique, SBU using the TE technique, and Adper Single Bond 2 (ASB2) as the control group, after exposing the occlusal dentinComposite cylinders were bonded to dentin and underwent µSBS test. Data were analyzed by two-way ANOVA and Tukey’s test (alpha=0.05). Results: All experimental groups showed significantly lower µSBS than the control group (P<0.05). However, the difference in µSBS was not significant among the experimental groups (P>0.05). Conclusion: The results showed higher µSBS of ASB2 (fifth-generation adhesive) than both universal adhesives (SBU and ABU) in SE and TE techniques. The µSBS to primary dentin depended on both adhesive type and technique.