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Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

Repair of amalgam restorations with composite resin and bonded amalgam: A microleakage study

2011; Medknow; Volume: 22; Issue: 6 Linguagem: Inglês

10.4103/0970-9290.94672

ISSN

1998-3603

Autores

Daniela AraújoVeloso Popoff, CláudiaSilami Magalhães, Raquel Conceição Ferreira, FabianaSantos Gonçalves, Allyson Nogueira Moreira, I.A. Mjör,

Tópico(s)

Dental Research and COVID-19

Resumo

Background: Total replacement is the most common technique for defective amalgam restorations, and it represents a major part of restorative dental treatment. Repair is an alternative option for amalgam restorations with localized defects. Aims: This study compared microleakage of amalgam restorations repaired by bonded amalgam or composite resin. Materials and Methods: Thirty extracted human pre-molars were prepared and restored with class I amalgam. A simulated defect was prepared that included the cavosurface margin on restorations, and the pre-molars were assigned to two treatment groups ( n =15): In group 1, premolars were treated by composite resin (34% Tooth Conditioner Gel + Adper Single Bond 2 + Z100) and in group 2, premolars were repaired by bonded amalgam (34% Tooth Conditioner Gel + Prime and Bond 2.1 + Permite C). The teeth were immersed in a 50% silver nitrate solution, thermocycled, sectioned longitudinally and then observed by three examiners using a stereomicroscope. Microleakage was evaluated using a 0-4 scale for dye penetration, and data was analyzed by Kruskal Wallis and Dunn tests. Results: Neither of the two methods eliminated microleakage completely. Composite resin was significantly the most effective for repair/tooth interface sealing (score 0 = 80.0%; P =0.0317). For the repair/restoration interface, composite resin was also statistically more effective as a sealant (score 0=66%; P =0.0005) when compared to the bonded amalgam technique (score 0=13%; P =0.0005). Conclusions: The use of adhesive systems significantly affected the ability to seal the repair/ tooth interface. However, at the level of the repair/restoration interface, the bonded amalgam technique may increase microleakage.

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