The bonding of glass ionomer cements to caries-affected primary tooth dentin.

Autor:	Alves FB; Department of Pediatric Dentistry, School of Dentistry, Universidade Estadual de Ponta Grossa, Ponta Grossa, Parana, Brazil., Hesse D, Lenzi TL, Guglielmi Cde A, Reis A, Loguercio AD, Carvalho TS, Raggio DP
Jazyk:	angličtina
Zdroj:	Pediatric dentistry [Pediatr Dent] 2013 Jul-Aug; Vol. 35 (4), pp. 320-4.
Abstrakt:	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.
Databáze:	MEDLINE
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