Colorimeter and Scanning Electron Microscopy Analysis of Teeth Submitted to Internal Bleaching

Tooth Discoloration of Immature Permanent Incisor Associated with Triple Antibiotic Therapy: A Case Report

“…The results showed that the dentin bonding agent can reduce the change in darkness of the teeth but cannot prevent it. The a* value indicates red on the positive axis and green on the negative (17)(18)(19). Therefore, the negative Da* values in group 1 (Table 1) indicate that the samples showed a greenish hue, and the dentin bonding agent was effective in preventing this kind of color change.…”

“…Therefore, the negative Da* values in group 1 (Table 1) indicate that the samples showed a greenish hue, and the dentin bonding agent was effective in preventing this kind of color change. The b* value represents yellow on the positive axis and blue on the negative (17)(18)(19). The positive Db* values in groups 1 and 2 (Table 1) indicate that the samples had became yellowish.…”

Shear bond strength and ultrastructural interface analysis of different adhesive systems to bleached dentin

“…Hydrogen peroxide (HP) is the active ingredient in currently used tooth bleaching materials. It might be applied directly or can be produced by a chemical reaction from carbamide peroxide or sodium perborate (Dahl and Pallesen, 2003; Martin‐Biedma et al, 2010; Plotino et al, 2008). Because of its low molecular weight, this substance can penetrate into dentinal tubules and acts as a strong oxidizing agent through the formation of free radicals, reactive oxygen molecules, and HP anions (Tredwin et al, 2006).…”

Analysis of the color alteration and radiopacity promoted by bismuth oxide in calcium silicate cement

“…The methods used to evaluate the color of materials include subjective 27 and quantitative analyses. 28 It has already been shown that sphere spectrophotometers, such as that used in this study, provide a more accurate assessment of the color change than subjective human evaluation. 29 This equipment measures the amount of visible radiant energy reflected or transmitted by an object, one wavelength at a time for each value, chroma, and hue present in the entire visible spectrum.…”