Successful teeth bleaching oblige that the gel go in the tooth through the enamel to the underlying dentin. The enamel of a tooth is very transparent and even the dentin is rather translucent. When a tooth is dark, the darkness is in the dentin. Therefore anything that is just brushed on your tooth won't alter the color of the tooth permanently. A bleaching substance has to soak deeply into your tooth and that takes time.
The color change is actually attained perfection by free constituent oxygen, which oxidizes the stain, as a result permanently removing it. The oxygen is released from a blend called peroxide. Most gels include carbamide peroxide, but some enclose hydrogen peroxide. The greater its concentration, the greater the bleaching effect. Some restriction comes in the displeasure caused by the peroxide. Accordingly the higher the concentration of peroxide, the greater the irritation. The peroxide gels are made as concentrated as possible without causing irritation of the tooth or soft tissues.
To make your teeth whiter the gel should be left on the teeth for a certain period of time. To achieve this, a custom-fitted tray is created to fit your teeth. The tray keeps the gel in contact with the teeth. Trays made professionally in a dental office are also trimmed to keep the gel off the gums if possible to keep the irritation effects to a minimum. The gel is sited over your teeth and you wear the tray for some time. The minimum time to allow the gel to penetrate the teeth is 20-30 minutes. Overnight gels evidently remain on the teeth for hours and repetitive action is required.
1. After the next visits, if no problems have appeared that seem to call for further monitoring, you are single-handedly. You can continue as long as you like, until the teeth obtain the whiteness you desire. Except providing refills, your cosmetic dentist can bring in a replacement splint in case your teeth get lost or damaged or simply wear out, for a small charge.
2. Many cosmetic dentists begin with treating the upper teeth first and the lower teeth later after. They do this for three reasons:
• They consider that they have a professional responsibility to deal with any tooth sensitivity questions with the first arch of teeth before beginning with the second arch.
• They also feel a need to know how much whitening is happening. This is very hard to tell if both upper and lower teeth are being whitened at the same time.
• They want you to see the results so that you will be pleased as a patient. It is possible for you personally to be tricked as to how much your own teeth are being whitened unless you do one arch first and then the other.
3. There are many dentists who state to be cosmetic dentists but they are not carefully trained in tooth bleaching techniques.