In situ effect of an erosive challenge on different restorative materials and on enamel adjacent to these materials

Rios, Daniela; Honório, Heitor Marques; Francisconi, Luciana Fávaro; Magalhães, Ana Carolina; Machado, Maria Aparecida de Andrade Moreira; Buzalaf, Marília Afonso Rabelo

doi:10.1016/j.jdent.2007.11.013

« Previous Next »Journal of Dentistry
Volume 36, Issue 2 , Pages 152-157, February 2008

In situ effect of an erosive challenge on different restorative materials and on enamel adjacent to these materials

Daniela Rios
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla 9-75, PO Box 73, 17012-101 Bauru, SP, Brazil
- Tel.: +55 14 32358346; fax: +55 14 32271486.
Heitor Marques Honório
- Department of Pediatric Dentistry, Alfenas Federal University, Gabriel Monteiro da Silva Street 714, 37130-000 Alfenas, MG, Brazil
- Tel.: +55 35 32991424.
Luciana Fávaro Francisconi
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla 9-75, PO Box 73, 17012-101 Bauru, SP, Brazil
- Tel.: +55 14 32358263; fax: +55 14 32261495.
Ana Carolina Magalhães
- Department of Pediatric Dentistry, School of Dentistry at Araçatuba, São Paulo State University, José Bonifácio Street 1193, 16015-050 Araçatuba, SP, Brazil
- Tel.: +55 18 36363235; fax: +55 18 36363200.
Maria Aparecida de Andrade Moreira Machado
- Department of Pediatric Dentistry, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla 9-75, PO Box 73, 17012-101 Bauru, SP, Brazil
- Tel.: +55 14 32358218; fax: +55 14 32271486.
Marília Afonso Rabelo Buzalaf
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla 9-75, PO Box 73, 17012-101 Bauru, SP, Brazil
- Corresponding author. Tel.: +55 14 32358346; fax: +55 14 32271486.

Received 10 October 2007; received in revised form 26 November 2007; accepted 27 November 2007.

Abstract

Objectives

This in situ study evaluated the effect of an erosive challenge on different restorative materials and on enamel restored with these materials, as well as the ability of these materials to protect the adjacent enamel against erosion.

Methods

Ten volunteers wore palatal devices with eight bovine enamel blocks, randomly selected and distributed into two vertical rows, corresponding to the following groups: GI/GV, resin-modified glass ionomer; GII/GVI, conventional glass ionomer; GIII/GVII, composite resin; GIV/GVIII, amalgam. One row (corresponding to groups I–IV) was immersed in a cola drink and the other row (corresponding to groups V–VIII) was subjected to saliva only. The palatal device was continuously worn for 7 days and only half of the appliance (groups I–IV) was immersed in the soft drink (Coca-Cola^®, 150mL) for 5min, three times a day. The study variables comprised the wear (profilometry, μm) and the percentage of surface microhardness change (%SMHC). Data were tested for significant differences by two-way ANOVA and Tukey's tests (p<0.05).

Results

Considering the restorative materials, for %SMHC and wear, there were no differences among the materials and between the saliva and the erosive challenge. For enamel analyses, the erosive challenge promoted a higher wear and %SMHC of the enamel than did the saliva. There were no significant differences in wear and %SMHC of the enamel adjacent to the different restorative materials.

Conclusion

This research data suggest that there is little %SMHC and wear of the studied restorative materials and none of them had a preventive effect against erosion on adjacent enamel, which showed a pronounced wear.

Keywords: Dental erosion, Enamel, Dental materials, In situ