Effect of calcium hydroxide on the bond strength of two bioactive cements and SEM evaluation of failure patterns

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Carolina Fabiana CentenaroMarcus Vinícius Reis Só

Abstract

The aim of this study was to assess the effect of calcium hydroxide on bond strength of two bioactive cements. One-mm thick longitudinal slabs of root dentin were obtained from freshly extracted human monorradicular teeth (n = 60). Simulated root perforations (1 mm in diameter) were prepared in radicular dentin. Thereafter, the specimens were randomly divided into two groups (n = 30), according to the repair material: MTA (n = 30) and Biodentine (BD) (n = 30). Next, the specimens in each group were further randomly divided into 4 equal subgroups (n = 15) according to the prior use of Ca(OH)2: MTA/Ca(OH)2 and BD/Ca(OH)2 groups: perforations were filled with calcium hydroxide [Ca(OH)2] and after 7 days, it was removed, and MTA and BD groups: calcium hydroxide dressing were not used. Push-out test was performed at a crosshead speed of 1 mm/min. Bond strength values were compared statistically using Kruskal-Wallis test and Dunn's post-test at a significance level of 5%. The failure analysis was performed using a stereoscopic and classified as adhesive, cohesive and mixed. The push-out bond strength of MTA and BD was not affected by the prior use of Ca(OH)2 (p > 0.05). BD yielded higher push-out bond strength values compared with th...Continue Reading

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Citations

Jan 27, 2018·European Archives of Paediatric Dentistry : Official Journal of the European Academy of Paediatric Dentistry·S RajasekharanR P Anthonappa
Jun 1, 2019·Restorative Dentistry & Endodontics·Andrea Cardoso PereiraAdriana de Jesus Soares
May 8, 2018·Journal of Dental Research, Dental Clinics, Dental Prospects·Taha ÖzyurekKoray Yilmaz

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