Active application improves the bonding performance of self-etch adhesives to dentin

do Amaral, Roberto César; Stanislawczuk, Rodrigo; Zander-Grande, Christiana; Michel, Milton Domingos; Reis, Alessandra; Loguercio, Alessandro Dourado

doi:10.1016/j.jdent.2008.09.010

« Previous Next »Journal of Dentistry
Volume 37, Issue 1 , Pages 82-90, January 2009

Active application improves the bonding performance of self-etch adhesives to dentin

Roberto César do Amaral
- Department of Dental Materials and Operative Dentistry, University of Oeste de Santa Catarina, Joaçaba, SC, Brazil
Rodrigo Stanislawczuk
- Department of Restorative Dentistry, University Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil
Christiana Zander-Grande
- Department of Restorative Dentistry, University Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil
Milton Domingos Michel
- School of Mechanical Engineering, University Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil
Alessandra Reis
- Department of Restorative Dentistry, University Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil
Alessandro Dourado Loguercio
- Department of Restorative Dentistry, University Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil
- Corresponding author at: Universidade Estadual de Ponta Grossa – Mestrado em Odontologia, Rua Carlos Cavalcanti, 4748, Bloco M, Sala 64A, Uvaranas, Ponta Grossa, Paraná 84030-900, Brazil.

Received 28 July 2008; received in revised form 21 September 2008; accepted 24 September 2008.

Abstract

Objectives

To evaluate the effect of application method on immediate and 6-month resin–dentin microtensile bond strength (μTBS) and nanoleakage (NL) of three one-step self-etch adhesives systems (Clearfil S³ Bond (S3), Xeno III (XE) and Adper Prompt L-Pop (AD)).

Methods

The oclusal enamel of 30 human molar was removed in order to expose a flat dentin surface. The adhesives were applied under two modes: inactive (IN) or active (AC) application. After light-curing (600mW/cm² for 10s), composite buildups were constructed incrementally and sectioned to obtain bonded sticks (0.8mm²) to be tested in tension immediately (IM) or after 6 months (6M) of water storage. For NL, three bonded sticks from each tooth at each time were coated with nail varnish, placed in silver nitrate and polished down with SiC paper. The μTBS data were submitted to a two-way ANOVA and Tukey’s test for each adhesive (α=0.05).

Results

The AC showed higher μTBS to dentin when compared to IN in both periods of time (p=0.001). Only for AD, lower μTBS was seen after 6M for IN and AC techniques. XE and S3 adhesives applied under IN showed a higher amount of silver penetration throughout the hybrid layer. Low silver nitrate deposition was seen for these adhesives under AC. After 6M, AD showed a higher amount of silver nitrate uptake under IN and AC techniques.

Conclusions

AC improves the bonding performance of all one-step self-etch adhesive systems tested regardless of the time and this tendency was maintained over time.

Keywords: Adhesives systems, Vigorous application, Durability, Long-term, Nanoleakage, Microtensile bond strength