Infiltração marginal em restaurações de amalgama de prata sob influencia de formas de condensação e uso de materiais intermediarios na interface marginal

AUTOR(ES)
DATA DE PUBLICAÇÃO

2000

RESUMO

The purpose of this "in vitro" study was to determine the sealing ability of amalgam restorations submit to 3 condensation techniques underlined with adhesive systems, resin modified glass ionomer, copal varnish and amalgam only, wich was use as control. Class V cavities were made in 210 bovine incisor teeth. The cavities had 4mm in diameter and 1.5mm in depth and were prepared at the root in such way that the margins were established in dentin. Before packing the amalgam (Dispersalloy), the cavities were treated, according to the manufacturer s direction, with Copalite Varnish, Vitremer, Enforce + Prime &Bond 2.1 and Prime &Bond 2.1.The sample remained stored in saline solution for a months and in the meantime they were thennocycled. Each thennocycling comprised of 500 cycles between 5° and 55° C with a dwell time of 15 seconds. After the tennal stress the sample were immersed in 0.5% basic fucsin solution 24 h. and washed. The teeth were embedded in resin acrylic and sectioned in a cutting machine (LABCUT). Three to four buccal-lingual cuts, including the restoration were obtained and the microleakage scored from "0" (no leakage) to "3" (maximum leakage). The highest score for each tooth was considered. Chi-square test was applied to the results and the following observations could be drawn: the 3 different condensation techniques did not significantly affect microleakage. It was also possible to observe that the specimens with Prime &Bond 2.1 and control grup showed signficatly less leakage the Enforce + Prime &Bond 2.1. No significantly difference between Copalite and the other groups, except the was obsered G1(control). The Vitremer was only significantly better than G4

ASSUNTO(S)

amalgamas dentarios microscopia eletronica de varredura cimentos dentarios adesivos dentarios

ACESSO AO ARTIGO

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