Effect of load cycling on nanoleakage of butt joint and beveled occlusal enamel margins in Class V composite resin restorations

Autores

  • Hamideh Ameri
  • Joseph E. Chasteen
  • Marjaneh Ghavamnasiri
  • Amin Maghami

DOI:

https://doi.org/10.7213/aor.v6i3.23160

Palavras-chave:

Class V cavity preparation, Enamel bevel, Nanoleakage, Load cycling

Resumo

Objectives: This study evaluated the influence of mechanical and thermal cycling on the nanoleakageof Class V composite resin restorations with and without enamel beveling. Material and method:Using 60 Class V cavities prepared on the buccal surfaces of human molars, specimens were dividedinto two groups (n = 30) based on the confi gurations of the enamel cavosurface margins. (beveled andnon-beveled) After restoring the cavity preparations with a fl owable composite, half of the specimenswere mechanically load-cycled. The specimens were sealed leaving a 1 mm window around the cervicaland enamel margins. Specimens were placed in a 50% (W/V) silver nitrate solution then immersedin photodeveloping solution and exposed to fl uorescent light for 8h. The teeth were buccolinguallysectioned, gold sputter coated and examined with a SEM to evaluate the nanoleakage values. The datawere analyzed using two-way ANOVA (α = 0.05). Results: Enamel margin confi guration had no significant effect on nanoleakage (p > 0.05). However, the nanoleakage value was signifi cantly higher inthe load-cycled group than in the group not load-cycled (p < 0.05). Conclusion: Since enamel margin confi guration does not affect nanoleakage, there is no need to bevel enamel margins of Class V cavitypreparations for composite restorations.

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Publicado

2010-11-29

Como Citar

Ameri, H., Chasteen, J. E., Ghavamnasiri, M., & Maghami, A. (2010). Effect of load cycling on nanoleakage of butt joint and beveled occlusal enamel margins in Class V composite resin restorations. Archives of Oral Research, 6(3). https://doi.org/10.7213/aor.v6i3.23160

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