Effect of load cycling on nanoleakage of butt joint and beveled occlusal enamel margins in class V composite resin restorations / Efeito do ciclo de carga na nanoinfi ltração de margens de esmalte oclusal com e sem bisel em restaurações classe V
Rev. clín. pesq. odontol. (Impr.)
;
6(3): 231-237, set.-dez. 2010. ilus, tab
Article
Dans Anglais
| LILACS, BBO
| ID: lil-617389
ABSTRACT
Objectives:
This study evaluated the infl uence of mechanical and thermal cycling on the nanoleakageof Class V composite resin restorations with and without enamel beveling. Material andmethod:
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.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Techniques in vitro
/
Résines composites
/
Émail dentaire
/
Percolation dentaire
Limites du sujet:
Humains
langue:
Anglais
Texte intégral:
Rev. clín. pesq. odontol. (Impr.)
Thème du journal:
Dentisterie
Année:
2010
Type:
Article
Pays d'affiliation:
Inde
/
Iran
/
États-Unis d'Amérique
Institution/Pays d'affiliation:
Mashhad University of Medical Sciences in Mashhad/IR
/
University of Medical Sciences/IR
/
University of Washington in Seattle/IN
/
University of Washington in Seattle/US
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