It is a treatment to change the tone of the teeth to a tone of greater clarity or whiter. Before discussing the advantages or disadvantages of the methods, it is necessary to know the structure of the tooth and the factors that influence the color change.
The crown of the tooth is composed of enamel on the outside, which is transparent and composed of minerals, and below is the dentin, which is yellowish and composed of mineral and organic material.
What causes the change of tonality? On the outside the enamel is not completely closed, Foods like coffee, tea, wine, cola, cola and of course the star a nicotine stains the glaze crystals, and enamel erosion during the lifetime of one that can be by more than 50%, will make a greater reflection of the dentin. The change in the inner part of the tooth in the dentin that calcifies over the years and becomes more yellowish the combination of all factors gives a result that when the teeth are older are more yellow. And that is correct
But there are cases in which the teeth erupt already with a dye tinted of light brown color, but they are factors that influence during the development of the teeth inside the jaws, and they will not change along the years, in other cases the change of tonality is due to trauma or a root canal treatment. The solution will be taken after an examination if internal tooth whitening or crowny restoration will be the most appropriate solution
Is it possible to avoid color change? The truth is almost impossible only external factors like food or nicotine have to be avoided as internal changes and erosion are inevitable.
METHODS OF BLEACHING: no matter of the method, it is necessary to eliminate the external factors that affect the appearance and the change of the tone of the teeth, which is done by cleaning / and eliminating tartar, the use of creams or spray powders with water with the purpose of making them clean. Only then can we see the color and tonality of the teeth, which may be different from tooth to tooth (for example, canines are always more yellowish than incisor teeth naturally and after eruption.
Preparations that are purchased freely and commercially
Home bleaching supervised by a dentist
Whitening in the dental office
The second group is a widely accepted method for decades, using Carbamide Peroxide materials similar to hydrogen peroxide. This is an unstable gel and must be in the refrigerator until use. After aplication the gel to a performed tray in the laboratory, it is placed on the teeth for a few hours a day or overnight, for 14 days, resulting in a clearing of the color of the tooth and giving the desired result.
The third group is performed in the clinic using the same gel at a very high concentration and with the application of a lamp of light in different waves, which increases the activity of clarification of the active substance and after about 90 minutes you get teeth clearer.
Advantages: The methods supervised by the dentist are used materials that demonstrate their effectiveness without causing any damage to the teeth. The home method is simple to implement for each patient, and has a similar effect to that of the clinic.
Disadvantages: Commercial or domestic production often causes irreversible damage and does not have medical supervision. The method in a clinic is more expensive and requires at least a 90-minute session with open mouth. Not for children under 18 years. It acts only on natural dental tissue, does not work on existing reconstructions or crowns. It is not possible to do when there is a great erosion of the enamel and it does not improve the appearance of the teeth with radicular exposure due to the retraction of the gums. It cannot be done in the presence of caries as it can cause irreparable damage to the teeth.
It is necessary to coordinate expectations before treatment because the expected outcome is not always achievable.
It should also be emphasized that whitening is not for life and require constant maintenance at home.
Nicotine and various foods reduce the success of treatment over time.