Simirsky, PhD Thesis, The enthalpies of combustion and regularities in the thermochemical properties of alkyl substituted carbamide
, Belarusian State University, (1986).
The effect of carbamide
peroxide bleach on the tensile bond strength of ceramic brackets: An in vitro study.
The concentration of these radicals in the tooth may vary according to the time during which the tooth remains in contact with the bleaching gel, justifying the lower SBS when carbamide
peroxide was used in comparison with hydrogen peroxide; the results are similar to those found in a previous study (28).
The whitening results of in-office and at-home whitening products are also more dramatic than OTC whitening products since they contain higher levels of carbamide
or hydrogen peroxide agents.
The most used bleaching agents are hydrogen peroxide, carbamide
peroxide and sodium perborate.
pH value in soils with carbamide
is much higher than in soils without carbamide
, where the fact that some carbamide
was decomposed into carbon dioxide (C[O.sub.2]) and ammonia (N[H.sub.3]) makes sense.
After one week of at-home whitening using 10% carbamide
peroxide gel (b), the stain was partially removed and has disappeared completely by the end of the bleaching treatment (c).
Both the above mentioned studies used nano filled composites, 35-36% carbamide
peroxide and 35-38% hydrogen peroxide as bleaching agents.
He noted that the plant will produce 650,000-660,000 tonnes of carbamide
[a.sub.0], [b.sub.0], [c.sub.0]--initial concentration of carbamide
, formaldehyde and derivatives of methyleneurea, mol/l;
The effect of 10% carbamide
peroxide bleaching material on microhardness of sound and demineralized enamel and dentin in situ.
The test specimens of the experimental group were bleached with Carbamide
peroxide gels at 10% or 21%, for 8 hours daily for a period of 2 weeks.