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Dental whitening (bleaching): When and how?

This patient from Montreal had yellow teeth in various shades. The dentist Dr François Lechner did a bleaching treatment and two porcelain veneers on the central incisors.

The natural color of teeth varies from grey to yellow depending on many factors. Teeth change color naturally with age, however consuming tobacco products and certain foods and beverages could change their appearance.

Teeth whitening is the most demanded treatment in dental offices. Whom in Montreal would not like to have a more radiant smile with whiter teeth?

To respond to this big demand, various whitening products are within reach of consumers.


Prices vary depending on the technique used.

But which product will be the best for your needs?

The majority of whitening products are made from hydrogen peroxide and could change the tooth color. However, bleaching products are not effective in all tooth whitening.

First you must consult with your dentist who will help you determine the cause of the discoloration. Non-vital teeth do not bleach and would need other treatments. Also whitening treatments are not possible on porcelain crowns, veneers, or all other restorations and therefore these restorations might not correspond with natural teeth color after whitening.

At the dental office a spectrophotometer is used to determine the actual tooth color and a treatment plan will be drafted.

If you have grey coloration in your teeth, we generally recommend a take-home program with costume-made trays and a whitening gel with a low concentraion (10%-15%)

If you have yellow coloration in your teeth we recommend an in-office whitening treatment with costume-trays for touch-ups (15%-35%)

Teeth sensitivity and tissue irritation might occur during the whitening treatment, however this is temporary.

It is important to understand that the results of this treatment cannot be guaranteed and can vary depending on the patient’s oral hygiene habits.

Before                                                                   After



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