Can the durability of one-step self-etch adhesives be improved by double application or by an extra layer of hydrophobic resin?

Reis, Alessandra; Albuquerque, Maurício; Pegoraro, Mariana; Mattei, Gracielle; Bauer, José Roberto de Oliveira; Grande, Rosa Helena Miranda; Klein-Junior, Celso Afonso; Baumhardt-Neto, Ricardo; Loguercio, Alessandro D.

doi:10.1016/j.jdent.2008.01.018

« Previous Next »Journal of Dentistry
Volume 36, Issue 5 , Pages 309-315, May 2008

Can the durability of one-step self-etch adhesives be improved by double application or by an extra layer of hydrophobic resin?

Alessandra Reis
- Department of Restorative Dentistry, Universidade Estadual de Ponta Grossa, Avenida General Carlos Cavalcanti, 4748, Bloco M, Sala 64A, Uvaranas, Ponta Grossa, PR 84030-900, Brazil
- Corresponding author at: Universidade Estadual de Ponta Grossa, Avenida Carlos Cavalcanti, 4748, Bloco M, Sala 64A, Uvaranas, Ponta Grossa, PR 84030-900, Brazil. Tel.: +55 42 32203741.
Maurício Albuquerque
- Department of Dental Materials and Operative Dentistry, University of Oeste de Santa Catarina, Rua Getúlio Vargas, 2127 Joaçaba, SC 89600-000, Brazil
Mariana Pegoraro
- Department of Dental Materials and Operative Dentistry, University of Oeste de Santa Catarina, Rua Getúlio Vargas, 2127 Joaçaba, SC 89600-000, Brazil
Gracielle Mattei
- Department of Dental Materials and Operative Dentistry, University of Oeste de Santa Catarina, Rua Getúlio Vargas, 2127 Joaçaba, SC 89600-000, Brazil
José Roberto de Oliveira Bauer
- Department of Dental Materials, University Nove de Julho, Rua Vergueiro, 235, Liberdade São Paulo, SP 05586-040, Brazil
Rosa Helena Miranda Grande
- Department of Dental Materials, University of São Paulo, Av. Lineu Prestes 2227 – Cidade Universitária, São Paulo, SP 05508-000, Brazil
Celso Afonso Klein-Junior
- School of Dentistry, Department of Dentistry, University Luterana do Brasil, Rua Martinho Lutero, 301, Bairro Universitário, Cachoeira do Sul, RS 96501-595, Brazil
Ricardo Baumhardt-Neto
- School of Chemistry, Department of Chemistry and Materials Science, University Federal do Rio Grande do Sul, Avenida Paulo Gama, 110, Porto Alegre, RS 90040-060, Brazil
Alessandro D. Loguercio
- Department of Restorative Dentistry, Universidade Estadual de Ponta Grossa, Avenida General Carlos Cavalcanti, 4748, Bloco M, Sala 64A, Uvaranas, Ponta Grossa, PR 84030-900, Brazil

Received 24 October 2007; received in revised form 16 January 2008; accepted 25 January 2008.

Abstract

Objectives

This study evaluated the immediate and 6-month resin–dentin μ-bond strength (μTBS) of one-step self-etch systems (Adper Prompt L-Pop [AD] 3M ESPE; Xeno III [XE] Dentsply De Trey; iBond [iB] Heraeus Kulzer) under different application modes.

Materials and methods

Dentin oclusal surfaces were exposed by grinding with 600-grit SiC paper. The adhesives were applied according to the manufacturer's directions [MD], or with double application of the adhesive layer [DA] or following the manufacturer's directions plus a hydrophobic resin layer coating [HL]. After applying the adhesive resins, composite crowns were built up incrementally. After 24-h water storage, the specimens were serially sectioned in “x” and “y” directions to obtain bonded sticks of about 0.8mm² to be tested immediately [IM] or after 6 months of water storage [6M] at a crosshead speed of 0.5mm/min. The data from each adhesive was analyzed by a two-way repeated measures ANOVA (mode of application vs. storage time) and Tukey's test (α=0.05).

Results

The adhesives performed differently according to the application mode. The DA and HL either improved the immediate performance of the adhesive or did not differ from the MD. The resin–dentin bond strength values observed after 6 months were higher when a hydrophobic resin coat was used than compared to those values observed under the manufacturer's directions.

Conclusions

The double application of one-step self-etch system can be safety performed however the application of an additional hydrophobic resin layer can improve the immediate resin–dentin bonds and reduce the degradation of resin bonds over time.

Keywords: Adhesive systems, Self-etch, Bond strength, Application, Durability