Clareamento dental caseiro por meio de fitas adesivas: relato de caso / Home bleaching using whitening strips: a case report

O clareamento caseiro, com peróxido de carbamida a 10%, aplicado por meio de moldeiras personalizadas, ainda é o protocolo de tratamento mais utilizado, quando se quer branquear os dentes. No entanto, está disponível técnica mais recente, que consiste na utilização de fitas adesivas pré-contornadas, impregnadas com agente clareador, que contêm diferentes concentrações de peróxido de hidrogênio. Aplicadas uma ou duas vezes ao dia, as fitas são facilmente adaptadas aos dentes anteriores. O objetivo deste artigo é apresentar relato de clareamento dental caseiro com utilização de fitas adesivas impregnadas com peróxido de hidrogênio a 6%, abordando suas principais características, indicações e limitações.

Vital bleaching using 10% Carbamide Peroxide and custom-made trays is still the most used technique for dental bleaching. However, there is a novel technique for bleaching vital teeth using whitening strips containing different concentrations of hydrogen peroxide. The strips are easily adapted in a QD or BID regimen over the anterior teeth. The aim of this paper is to present a clinical case where 6% hydrogen peroxide strips were used, and to discuss the main characteristics, indications and limitations.

Diametral tensile strength of two brazilian resin-modified glass ionomers cements: influence of the powder/liquid ratio

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 ratio1:1 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.