Dental bleaching with the laser takes place through an oxidation process by applying a gel based on hydrogen peroxide (H2O2) to the teeth. This substance is activated by the laser which in turn releases free radicals that penetrate the dental enamel eliminating the stains present. Here are the various stages of laser bleaching:
- Professional tooth cleaning. It is important that there is no tartar or food residue between the teeth.
- Pigmentation. Depending on the subject, the appropriate shade for the teeth is chosen through a colorimetric scale.
- Gel. The dentist inserts a rubber dental dam for the protection of the gums and applies the hydrogen peroxide-based whitening gel.
- Laser. The teeth are irradiated by the laser to eliminate stains in depth.
- Laying and removing. It is expected from 15 to 40 to allow the product to take effect. The dentist will later remove the gel and dam.
There are currently three types of lasers that can be used for bleaching: the argon laser, the CO2 laser and the diode laser. The latter is the most widely used. The other two differ in the presence or absence of an increase in temperature. The argon laser, in fact, allows to avoid any thermal rise compared to the CO2 one.
Pros and cons
Among the advantages of laser bleaching we find speed, as the effect is visible immediately and improves in the following days. This type of treatment is indicated for those who suffer from dental sensitivity and need a totally painless whitening treatment.
Furthermore, the execution time is short compared to other types of whitening while the results are visible up to about 10 months later, depending on the patient’s lifestyle.
Among the disadvantages we can find some cases of discomfort or burning in the days following the treatment, having to avoid certain substances, such as coffee and dyes, and refraining from smoking for about seven days. In addition, laser bleaching is more expensive than other treatments. The price of a session is around 300 euros.
Finally, patients with severe pathologies, gel allergy, pregnant or breastfeeding women, hypersensitive or damaged teeth cannot use this treatment.