Ambulatory Lightening: Teeth Whitening


1. How does it work?

The carbamide peroxide included in the gel transforms into hydrogen peroxide (hydrogen peroxide) when in the mouth. The oxygen thus released passes through the enamel crystals and acts on the underlying dentin layer (yellow) in order to lighten the teeth.


2. How long does the treatment last?

Unsually it takes two weeks, up to 6 weeks depending on the initial shade of your teeth. It is important to continue treatment until its end in order to obtain a stable result over time.


3. How long does it last?

It may be necessary to repeat a treatment after 8 or 10 years.


4. Can anyone have his or her teeth lightened?

Lightening may be contraindicated in some cases. Your dentist may set certain temporary or permanent limits, in particular:

  • People under the age of 16 because the pulp chamber is larger, therefore the teeth would be more sensitive during whitening.

  • Pregnant or breastfeeding women.

  • People with sensitive teeth or gums, including the sensitivity associated with gingival recession or faulty fillings (fillings, composites).

  • People suffering from gingivitis, periodontitis or advanced cavities.

  • Fillings (fillings, composites), crowns or veneers do not bleach with peroxide. We must consider redoing these restorations after bleaching if the result leaves unevenness in color.


5. Use of the gutter

  • Brush your teeth, as the gel is much more effective on clean teeth.

  • Using the syringe, apply a small drop of gel (the size of a half-lens) inside the gutter on the side corresponding to the outer face of the teeth (never on the last tooth of the arch). Do not use more than ½ syringe for both arches.

  • Insert the gutter into the mouth and position it well on the teeth. Remove excess gel with your finger if necessary. If the excess is too important, rinse gently without swallowing, and plan to apply less the next day ...

  • Wear the gutters overnight if you can stand them.

  • The next day, remove the gutter, rinse your mouth thoroughly and clean the gutter with a soft toothbrush in cold tap water. Store the gutter in the provided case.

6. Precautions during bleaching

  • Avoid coloring agents as much as possible (coffee, tea, cigarettes, red wine, tobacco, liquorice, tomato sauce, cherries, blueberries ...) especially during the 30 minutes following the removal of the gutter and if possible throughout the duration of the treatment and then during the following week, in order to optimize the results.

  • Store the bleach away from direct sunlight and heat. Refrigeration recommended. Do not freeze.

  • Do not swallow the gel or rinse aid. Products contain peroxide and may also contain fluorine; ingestion of large quantities of these products may be harmful.

  • Keep the gel out of the reach of small children.


7. Minor or temporary effects

  • A small percentage of patients may experience sensitivity (to cold) with bleaching. If this is your case, space out the use of the gutter (every other night or every third night). In case of extreme sensitivity, stop the treatment and contact Dr Barral-Cadière who will prescribe a desensitizing gel. This gel would be placed in the gutter as the lightening product with a wear of only 10 minutes up to an hour in case of more severe pain.

  • Foods and juices high in citric acid can cause sensitivities.

  • Some patients have noticed temporary discomfort in the gums, lips, throat or tongue. If these symptoms persist for more than two days or worsen gradually, call your dentist. These side effects usually subside 1 to 3 days after stopping treatment.

  • White spots on the enamel may appear during whitening. They will dissipate at the end of the whitening process.

  • The teeth are naturally darker along the gum line. This area may require more time to lighten compared to the rest of the tooth surface and generally remains a bit darker.

  • Some old amalgams or "silver" fillings can leave a dark purple mark in your whitening tray, this is normal.

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