Microleakage in primary teeth restored by conventional or bonded amalgam technique.

• Autor(a) principal: Myaki, S. I.
• Data de Publicação: 2001
• Outros Autores: Rodrigues, C. R., Raggio, D. P., Flores, T. A., Matson, M. R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.forp.usp.br/bdj/bdj12(3)/trab11123/trab11123.pdf; http://hdl.handle.net/11449/66609
• topic: biomedical and dental materials; copal rosin varnish; dental alloy; dentin bonding agent; methacrylic acid derivative; One Step dentin bonding system; One-Step dentin bonding system; plant resin; resin; resin cement; resinomer; Scotchbond Multi Purpose Plus; Scotchbond Multi-Purpose Plus; comparative study; deciduous tooth; dental bonding; dental surgery; human; incisor; maxilla; methodology; nonparametric test; tooth disease; Composite Resins; Dental Amalgam; Dental Bonding; Dental Cavity Lining; Dental Leakage; Dental Materials; Dental Restoration, Permanent; Dentin-Bonding Agents; Humans; Incisor; Maxilla; Methacrylates; Resin Cements; Resins, Plant; Statistics, Nonparametric; Tooth, Deciduous

The aim of this in vitro study was to evaluate marginal leakage in class V restorations in primary teeth restored with amalgam, using three different techniques. Thirty maxillary anterior primary teeth, clinically sound and naturally exfoliated, were used. In group 1 (n = 10), two thin layers of a copal varnish (Cavitine) were applied. In group 2 (n = 10), Scotchbond Multi-Purpose Plus, a dual adhesive system, was used according to manufacturer instructions. In group 3 (n = 10), One-Step adhesive system in combination with a low-viscosity resin (Resinomer) were used according to manufacturer instructions. All samples were restored with a high-copper dental amalgam alloy (GS 80, SDI). After restoration, the samples were stored in normal saline at 37 degrees C for 72 h. The specimens were polished, thermocycled (500 cycles, 5 degrees and 55 degrees C, 30-s dwell time) and impermeabilized with fingernail polish to within 1.0 mm of the restoration margins. The teeth were then placed in 0.5% methylene blue for 4 h. Finally, the samples were sectioned and evaluated for marginal leakage. The Kruskal-Wallis test showed that the filled adhesive resin (group 3) had the least microleakage. There was no significant difference between groups 1 and 2.