Authors: TR Aguiar *• CF Pinto 1• V Cavalli 2• M Nobre-dos-Santos 3• GMB Ambrosano4 • P Mathias5 • M Giannini 6
*Thaiane Rodrigues Aguiar, DDS, MS, PhD student, Department of Restorative Dentistry, Piracicaba School of Dentistry, University of Campinas, Piracicaba, Brazil
1-Cristiane Franco Pinto, DDS, MS, PhD, Department of Restorative Dentistry, São Francisco School of Dentistry, São Francisco University, Bragança Paulista, Brazil
2-Vanessa Cavalli, DDS, MS, PhD, Division of Operative Dentistry, Department of Dentistry, University of Taubaté, Taubaté, São Paulo, Brazil
3-Marinês Nobre-dos-Santos, DDS, MS, PhD, Department of Pediatric Dentistry, Piracicaba School of Dentistry, State University of Campinas, Piracicaba, São Paulo, Brazil
4- Glaucia Maria Bovi Ambrosano, DDS, MS, PhD, Community Dentistry Department, Piracicaba School of Dentistry, State University of Campinas, Piracicaba, SP, Brazil
5- Paula Mathias, DDS, MS, PhD, Department of Restorative Dentistry, Federal University of Bahia, Salvador, Bahia, Brazil
6- Marcelo Giannini, DDS, MS, PhD, Department of Restorative Dentistry, Piracicaba School of Dentistry, University of Campinas, Piracicaba, Brazil
Within the limited experimental conditions, the self-adhesive cements provided fluoride ion release capacity. The fluoride release for all resin cements was not uniform during pH cycling, decreasing throughout the duration of the study.
This study evaluated the effects of curing modes and storage conditions on fluoride release of resin cements. In phase 1, the cumulative fluoride release rate from samples of the resin cements (Panavia F 2.0, RelyX Unicem, MaxCem, and BisCem) was quantified after 15 days storage in water (n=4). In phase 2, the fluoride release profiles from the same materials were analyzed during pH cycling (n=4). In this second phase, fluoride was measured at specific times (one, two, three, five, eight, and 15 days). Disk-shaped specimens were prepared (10 mm × 0.5 mm), and the materials were either light activated or allowed to autopolymerize. For both phases, the fluoride release was measured using a fluoride ion-specific electrode. The fluoride release in water was not affected by the curing mode of RelyX Unicem and Maxcem resin cements. Panavia F. 2.0 and BisCem resin cements, either light cured or autopolymerized modes, released higher amounts of fluoride in water than the other self-adhesive cements. In phase 2, the concentration of fluoride released decreased from the first day of pH cycling until the 15th day for all resin cements, for both curing modes, regardless of the storage solution used (demineralizing/remineralizing). The fluoride release rate during pH cycling by Panavia F 2.0 and MaxCem was not affected by the curing mode. The effect of the curing mode on fluoride ion release in water or during pH cycling was product dependent.
Source: Operative Dentistry