Banner Portal
Diametral tensile strength of two Brazilian resin-modified glass ionomers cements: influence of the powder/liquid ratio
Remote

Keywords

Tensile strength. Dental cements. Ionomer. Resin

How to Cite

1.
Lund RG, Ogliari F, Lima GS, Del-Pino FAB, Petzhold CL, Piva E. Diametral tensile strength of two Brazilian resin-modified glass ionomers cements: influence of the powder/liquid ratio. Braz. J. Oral Sci. [Internet]. 2016 Jan. 21 [cited 2024 Apr. 14];6(21):1353-6. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642990

Abstract

The aim of this study was to evaluate the influence of powder/liquid ratio in the diametral tensile strength of two resin-modified glass ionomers cements (RMGIC). Two Brazilian brands of RMGIC: Resiglass R (RG: Biodinâmica) and Vitro Fil LC (VF: DFL) were used. Each product was mixed in two different powder/liquid ratios, (1:1) 1 scoop of powder to one drop of liquid or (1:2) 1 scoop of powder to 2 drops of liquid. The control was considered the powder/ liquid ratio recommended by each manufacturer (RG 1:1 and VF 1:2 P/L). Four groups (n=5) with sample dimensions of 2.5 and 5.0 mm (thickness and diameter respectively) were tested. Diametral Tensile Test was performed in a mechanical testing machine (EMIC DL 500). Data obtained were submitted to One-way ANOVA and Tukey’s multiple comparisons test (α=5%). For both national RMGICs, the experimental variations in the powder/liquid ratio led to an increase in diametral tensile strength when compared to the ratios advocated by the manufacturers. Group VL manipulated with experimental ratio 1:1 showed statistically the highest (25.54±2.38 MPa) DTS mean among the tested groups whereas Resinglass R manipulated with 1:1 ratio, as advocated by manufacturer, showed statistically the lowest DTS mean (9.27±1.37 MPa). A review and further adjustments in the ratios recommended by the manufacturers of both resin-modified glass ionomers cements investigated is necessary
https://doi.org/10.20396/bjos.v6i21.8642990
Remote

References

Fleming GJP, Farooq AA, Barralet JE. Influence of powder/liquid mixing ratio on the performance of a restorative glass-ionomer dental cement. Biomaterials. 2003; 24: 4173-9.

Mitsuhashi A, Hanaoka K, Teranaka T. Fracture toughness of resin-modified glass ionomer restorative materials: effect of powder/liquid ratio and powder particle size reduction on fracture toughness. Dent Mater. 2003; 19: 747-57.

Wilder AD, Boghosian AA, Bayne SC, Heymann HO, Sturdevant JR, Roberson TM. Effect of powder/liquid ratio on the clinical and laboratory performance of resin-modified glass ionomers. J Dent. 1998; 26: 369-77.

Young AM, Rafeeka SA, Howlett JA. FTIR investigation of monomer polymerisation and polyacid neutralisation kinetics and mechanisms in various aesthetic dental restorative materials. Biomaterials. 2004; 25: 823-33.

Bresciani E, Barata TJE, Fagundes TC, Adachi A, Terrin MM, Navarro MFL. Compressive and diametral tensile strength of glass ionomer cements. J Appl Oral Sci. 2004; 12: 344-8.

Cefaly DFG, Franco EB, Mondelli RFL, Francisconi PAS, Navarro MFL. Diametral tensile strength and water sorption of glassionomer cements used in atraumatic restorative treatment. J Appl Oral Sci. 2003; 11: 96-101.

Anusavice K J. Phillips’ science of dental materials. 11. ed. Philadelphia: WB Saunders; 2003.

The Brazilian Journal of Oral Sciences uses the Creative Commons license (CC), thus preserving the integrity of the articles in an open access environment.

Downloads

Download data is not yet available.