Journal of Conservative Dentistry
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ORIGINAL ARTICLE
Year : 2013  |  Volume : 16  |  Issue : 6  |  Page : 536-539

Influence of preheating the bonding agent of a conventional three-step adhesive system and the light activated resin cement on dentin bond strength


1 Department of Restorative Dentistry, Dental School and Institute and Research Center São Leopoldo Mandic, Campinas, Sao Paulo, Brazil
2 Department of Preventive and Social Dentistry, Dental School and Institute and Research Center São Leopoldo Mandic, Campinas, Sao Paulo, Brazil

Correspondence Address:
Roberta Tarkany Basting
Department of Restorative Dentistry, Dental School and Institute and Research Center São Leopoldo Mandic, Rua José Rocha Junqueira, 13, Bairro Swift, Campinas - SP, CEP-13045-755
Brazil
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-0707.120965

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Aims: to evaluate the influence of preheating the bonding agent (Scotchbond Multipurpose Adhesive/3M ESPE) and the light-activated resin cement (RelyX Venner/3M ESPE) on dentin microtensile bond strength. Materials and Methods: The exposed flat dentin surface of 40 human third molars were randomly distributed into four groups for cementation (SR Adoro/Ivoclar Vivadent) (n = 10): G1-bond and resin cement, both at room temperature (22°C), G2-bond preheated to 58°C and cement at room temperature (22°C), G3-bond at room temperature (22°C) and the cement preheated to 58°C, G4-bond preheated to 58°C and cement preheated to 58°C. Sticks of dentin/block set measuring approximately 1 mm 2 were obtained and used for the microtensile bond strength test. All sticks had their failure mode classified. Statistical analysis used: Factorial analysis of variance was applied, 2 × 2 (bond × cement) (P < 0.05). Results: Preheating the bonding agent (P = 0.8411) or the cement (P = 0.7155), yielded no significant difference. The interaction bond × cement was not significant (P = 0.9389). Conclusions: Preheating the bond and/or the light-activated resin cement did not influence dentin bond strength or fracture failure mode.


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