|
Chemical bleaching of teeth - the pros and cons
07-09-2009
What is the chemical method of tooth whitening?
It is based on the ability of atomic (active) oxygen to initiate the oxidation processes that convert the binary compounds of carbon C = C (determine the degree of pigmentation) in single, less pigmented. As a result of the tooth (s) are perceived as more white. As a source of active oxygen in the currently most often used carbamide peroxide. In the past few years there is evidence that the most effective and safe means of so-called whitening of the dead (already had a root) of teeth is only sodium perborate used without hydrogen peroxide.
Which teeth to be bleached and what can be determined by differences in the effectiveness of this procedure?
Chemical bleaching sufficiently effective method of whitening teeth, but only those who do not have on its front surface of the artificial surfaces. Artificial materials (polymers, crowns) are not subjected to bleaching! Another limitation for teeth whitening is the presence of defects in the seals and vulnerable sections of dentin. In such cases, the effect on teeth whitening mixture may cause unwanted irritation and pain. But even with the implementation of these conditions, alas, but the chemical bleaching is not always able to correct discoloration of the teeth. For example, the most well-amenable whitening teeth with yellow, less well - brown. As the teeth gray, the effectiveness of their chemical bleaching at all questionable.
Do not be chemically damaged teeth whitening, whose integrity is restored with the help of a pin photopolymer or ceramics, as well as those whose color changed based in their seals.
That is why the question of the appropriateness and method of tooth whitening should be made on the basis of consultation dentist.
Where can be the chemical bleaching of teeth?
At present, this procedure can be performed as a home, and in the dentist's office.
And in both cases the chemical bleaching is carried peroxides, but used at the same concentration significantly different.
Previously, most often for home tooth whitening using only specially prepared pastes (gels), containing peroxide, usually 10%. Bleaching mixture dentist gave the patient with individual kappa (think boxers), in which there is little room for her. The procedure is usually performed at night - the patient wears a mouthguard with a mixture of the night. Less likely to use a double mode of wearing mouthguards (for several hours in the morning and evening). Typically, the duration of the chemical bleaching in this case is 20 days.
Are becoming increasingly popular bleaching strips "White strips", which are more simple and easy to use and demonstrate a more pronounced whitening effect in the first days of application. Although the length of whitening remains roughly the same. Among the "shortcomings", the scope of "territory" from canine to canine, which is not always satisfied with the patient. In such cases, can be used combined methods of bleaching.
Desk chemical teeth whitening is different, primarily because of his conduct with the bleaching mixtures of higher concentration (16%, 22% or 38% carbamide peroxide). In addition, to intensify the process of formation of active oxygen also use laser or special light / heat exposure. As a result, the duration of a chemical teeth whitening procedure is reduced to 30-60 minutes, and the desired result can be achieved after the first and third visits to the dentist.
What if after a chemical bleaching of teeth sections were darker in color?
It must seem a dentist, he must determine the cause of this phenomenon and to choose the most appropriate way to tackle the "defect". Among the most common methods:
elimination of small plots, which did not respond to the chemical bleaching, with careful polishing the tooth surface with water mixture (suspension) of a strong acid and pumice (microabrasion)
covering the outer surface did not react to bleaching of teeth with a thin film consisting of a special resin or porcelain
ceramic coating of the tooth crown necessary color.
Selecting a particular method, supplementing the chemical bleaching, is a dentist.
How persistent is the method of chemical bleaching teeth?
Results of chemical bleaching of teeth in the absence of effects of damaging factors (see above) are stored for 2-5 years, which is acceptable for most patients.
| |
