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ORIGINAL ARTICLE
Year : 2013  |  Volume : 3  |  Issue : 3  |  Page : 216-221

Resin bond to root dentin: Influence of adhesive systems and solvent drying time


1 Department of Dental Materials and Prosthodontics, São Paulo State University, Sao Paulo, Brazil
2 Department of Dental Materials, Federal University of Pelotas, Pelotas/RS, Brazil
3 Department of Dentistry, Federal University of Rio Grande do Norte, Natal/RN, Brazil
4 Department of Dental Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Brazil

Correspondence Address:
Rodrigo O A Souza
Department of Dentistry, Federal University of Rio Grande do Norte, Natal/RN, Rua Praia de Guajirú, 9215, Ponta Negra, Natal/RN. Cep: 59.092-220
Brazil
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2278-9596.129567

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Background: Endodontically treated teeth with damaged coronal tooth structure need an additional retention to provide a durable restoration. We evaluate different adhesive systems and solvent drying time on the push-out bond strength of fiber posts luted to root dentin. Materials and Methods: For this in vitro study, the canals of 90 bovine teeth (16 mm in length) were prepared, the roots were embedded (14 mm) in acrylic resin and allocated into nine groups (n = 10), according to the "adhesive system" (Multi-bottle etch-and-rinse self-curing adhesive system-MBSC/ Scotchbond Multi-Purpose; Simplified etch-and-rinse dual-curing adhesive-SLC/One-Step; Simplified etch-and-rinse light-curing adhesive-SDC/Excite DSC) and "solvent drying time" (control, 50 s and 110 s). The fiber posts were luted using resin cement and composite cores were made. Each set of root/post/core was submitted to mechanical cycling (10.000.000 cycles, 84 N, 4 Hz). Each root was cut into four disk-samples (1.8 mm in thickness) and submitted to push-out testing. The data (MPa) were analyzed using analysis of variance (ANOVA) (two-way) and Tukey's test (5%). Results: The factor "adhesive system" (P = 0.0081) influenced the bond strength significantly (ANOVA). The MBSC groups (6.0 ± 2.2 MPa) promoted higher bond strength than SLC groups (3.7 ± 2.1 MPa) b and was similar to SDC groups (4.4 ± 3.4 MPa) a, b (Tukey). Conclusion: The solvent drying time did not affect the bond strength of fiber postluted to root dentin, regardless the adhesive solution used.


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