Influence of 0.05% sodium fluoride solutions on microhardness of resin-modified glass ionomer cements.
This study aimed to evaluate the influence of fluoride-containing mouthrinse solutions (Fluorgard and Oral B) on the superficial microhardness of two resin-modified glass ionomer cements (Vitremer and Fuji II LC). Fifteen discs-shaped specimens of each glass ionomer cement (Ø10 mm; 2 mm thick) were prepared, thereby forming two groups. After 24-hour storage in artificial saliva, the microhardness was measure and the data were recorded. Next, each group was divided into three subgroups (n = 5), according to the solution to be immersed in. Control specimens were kept in artificial saliva along the whole experiment. The test specimens were kept in mouthrinse solution for 30 days. Vickers surface microhardness was analyzed at predetermined evaluation periods: 24 h, 48 h, 7, 14, 21 and 30 days after specimens' preparation. Data were subjected to three-way ANOVA and to Tukey test (p<0.05). A better behavior of Fuji II LC was observed and Fluorgard affected most the characteristics of the tested materials. It may be concluded that fluoride-containing solutions influenced the tested characteristics of materials, mainly of Vitremer.
Wilde
Marcia Gabriela Klan
MG
Department of Restorative Dentistry, Ribeirao Preto School of Dentistry, University of São Paulo, Ribeirão Preto, Brazil.
Delfino
Carina Sinclér
CS
Sassi
Juliano Fernandes
JF
Garcia
Patrícia Petromilli Nordi Sasso
PP
Palma-Dibb
Regina Guenka
RG
D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000379:methods; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D012464:Saliva, Artificial / Q000378:metabolism; D012969:Sodium Fluoride / Q000494:pharmacology*; D013997:Time Factors
D003188:Composite Resins; D003764:Dental Materials; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D019279:Resin Cements; D012117:Resins, Synthetic; D012464:Saliva, Artificial; C084550:Vitremer; D012969:Sodium Fluoride