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Sodium silicate glass-to-glass bonding has the advantage that it is a low-temperature bonding technique, as opposed to fusion bonding. [21] It also requires less processing than glass-to-glass anodic bonding, [ 23 ] which requires an intermediate layer such as silicon nitride (SiN) to act as a diffusion barrier for sodium ions. [ 23 ]
Sodium hydroxide, also known as lye and caustic soda, [1] [2] is an inorganic compound with the formula NaOH.It is a white solid ionic compound consisting of sodium cations Na + and hydroxide anions OH −.
An implementation of several whitening procedures in R, including ZCA-whitening and PCA whitening but also CCA whitening, is available in the "whitening" R package [7] published on CRAN. The R package "pfica" [8] allows the computation of high-dimensional whitening representations using basis function systems (B-splines, Fourier basis, etc.).
Most extrinsic discoloration is readily removed by cleaning the teeth, whether with "whitening" (i.e., abrasive) toothpaste at home, or as treatment carried out by a professional (e.g., scaling and/or polishing). To prevent future buildup of extrinsic stains, identification of the cause (e.g., smoking) is required.
Other types, called paint markers, contain volatile organic compounds which evaporate to dry the ink, and are similar to spray paint. Due to solvents such as toluene and xylene often being present in permanent markers, they have a potential for abuse as a recreational drug. The permanent marker was invented in 1952 by Sidney Rosenthal.
Rembrandt Intense Stain and Rembrandt Deeply White toothpaste contain hydrated silica. [1]In a study published in 2011 in the Journal of Clinical Dentistry, Rembrandt Intense Stain was found to have a relative dentin abrasion of around 90 (mildly abrasive) and was in the middle of those tested in terms of cleaning.
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