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The Bonding of Glass Ionomer Cements to Caries-affected Primary Tooth Dentin

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Purpose: The purpose of this study was to evaluate the bonding of glass ionomer cements (GICs) to sound and caries-affected dentin by microtensile bond strength (μTBS) and nanoleakage (NL) tests. Methods: Occlusal cavity preparations were made in 36 sound primary molars. Half of the specimens were submitted to a pH-cycling model to create simulated caries-affected dentin. Teeth were randomly restored with one of the three materials: (1) resin-modified GIC with nanoparticles (Ketac N100; KN); (2) resin-modified GIC (Vitremer; VI); and (3) high-viscosity GIC (Ketac Molar Easy Mix; KM). Specimens were tested using a microtensile test (1 mm/minute). One specimen from each tooth was immersed in ammoniacal silver nitrate for 24 hours and revealed after eight hours to assess interfacial NL. The μTBS means were analyzed by 2-way analysis of variance and Tukey's post hoc test. For NL, Kruskal-Wallis and Mann-Whitney tests were used (P<.05). Results: No difference was found between sound and caries-affected dentin (P>.05). KM showed the lowest GIC-dentin μTBS values, while VI and KN showed higher values. Infiltration of ammoniacal silver nitrate into the adhesive interface was not affected by sound or caries-affected dentin. Conclusion: Caries-affected dentin does not jeopardize the bonding of glass ionomer cements to primary tooth dentin.
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Keywords: DENTAL BONDING; DENTAL CARIES; GLASS IONOMER CEMENTS

Document Type: Research Article

Affiliations: 1: Department of Pediatric Dentistry, School of Dentistry, Universidade Estadual de Ponta Grossa, Ponta Grossa, Parana, Brazil 2: Department of Pediatric Dentistry, School of Dentistry, Universidade de São Paulo, São Paulo, São Paulo, Brazil 3: Department of Restorative Dentistry, School of Dentistry, Universidade Estadual de Ponta Grossa, Ponta Grossa, Parana, Brazil 4: Department of Pediatric Dentistry, School of Dentistry, Universidade de São Paulo, São Paulo, São Paulo, Brazil. [email protected]

Publication date: July 1, 2013

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  • Pediatric Dentistry is the official publication of the American Academy of Pediatric Dentistry, the American Board of Pediatric Dentistry and the College of Diplomates of the American Board of Pediatric Dentistry. It is published bi-monthly and is internationally recognized as the leading journal in the area of pediatric dentistry. The journal promotes the practice, education and research specifically related to the specialty of pediatric dentistry. This peer-reviewed journal features scientific articles, case reports and abstracts of current pediatric dental research.
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