The whitening process is based on the principles of photochemical activation. This is a process where the whitening gel is activated by an energy source (laser). Consequently, the activity of the whitening agent is increased, maximizing the whitening result.
What to expect during the session?
Your dentist will place a rubber protective device in your mouth to keep it open during the procedure. Then, a protective coating is applied to your gums to prevent them from coming into contact with the whitening gel, thus preventing irritation.
Next, the dentist applies the whitening gel to your teeth and activates the gel using the laser. The gel is left on your teeth for a few minutes at a time, then removed and reapplied until the desired shade is achieved.
The entire appointment can last from 30 to 90 minutes.
What ingredients do the whitening gels contain?
Carbamide peroxide and hydrogen peroxide are the most common whitening agents used in teeth whitening treatments. The concentration of peroxide used by dentists for in-office whitening is high, around 35% or a little more. This can cause sensitivity, so the dentist takes special measures, which usually include providing a specialized toothpaste or desensitizing gel.
What are the contraindications for whitening application?
Laser teeth whitening is not for everyone. There are certain cases where laser teeth whitening cannot be applied. These include:
- Patients with extensive cavities or non-cavity-related lesions (such as abrasion, abfraction, erosion, and cracks)
- Cervical sensitivity
- Extensive restorations on anterior teeth
- Uncontrolled periodontal disease
- Women during pregnancy
