Estudo in vitro da microinfiltração marginal em reparos de restaurações à amalgama.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

The aim of this study was to evaluate the effect, on the mcroleakage, of three different restorative materials on the repair of amalgam retorations. Class I restorations were prepared on 45 healthy recently-extracted human pre-molars. After 72 h, new class I cavity preparations were carried out over previously made amalgam restorations to simulate a clinical repair. Teeth were divided randomly into 3 groups of 15 each and repaired by one of the three proposed materials and polished; always according to manufacturer intructions. Apical sealing was followed by thermal treatment with complised of 500 cycles raging from 5C - 55C per minuts. Followig this, the samples were stained with 50% silver nitrate for 24 hours, for assessment of microleakage. The level of leakage was scored for all samples by three examinners whom did not know the code of the sample. The procedure was carried out with light microscopy. The results showed that no material was 100% effetive marginal sealing. Statistical analysis showed, for repair/thoot interfaces, that all materials had statistically differents results: composite resin had less microleakage,following by bonded amalgam; for repair/restoration interfaces, traditional amalgam exhibited higher sealing, following by composit resin, but not any statistically differences were found between them. Despite this, composite resin may be the most indicated restorative material to repair amalgam restorations when the microleakage is evaluated.

ASSUNTO(S)

odontologia microinfiltração marginal amálgama dentário reparo

ACESSO AO ARTIGO

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