Whitening with the aligner that already fits

Teeth whitening works through a peroxide. It breaks down on the tooth surface and penetrates the hard tooth tissue, where it breaks up the pigment molecules that have built up over the years. The tooth is not worn away and not coated; instead, the embedded pigment is altered.

For this to work, the gel must stay where it is meant to act, evenly and long enough. That is exactly what an aligner that fits your teeth precisely does: it holds the gel against the tooth, keeps saliva and the tongue away, and confines it to the surface that matters.

Anyone undergoing aligner treatment already has this form. It was made from a scan of your own jaws and sits more closely than any prefabricated tray from a drugstore. The same applies to the set of trays that secures the result after treatment, the Vivera retainer.

The preparation is called Invisalign Professional Whitening System and is made by Ultradent, the manufacturer of the Opalescence range. In Germany it is available only as a home application and only through dental practices.

What is in it and what it does

That is the real reason why whitening and teeth straightening complement each other well: after the correction every surface is exposed. What was hidden in crowding before can now be treated evenly. A result that looks good right after whitening and later shows dark strips at the newly exposed edges is produced exactly by the wrong sequence.

During aligner treatment, small tooth-colored raised areas of composite sit on individual teeth, the attachments. They give the aligner a point of purchase for movements that would otherwise not succeed. And during whitening they raise a legitimate question: does the tooth under the attachment also become lighter?

The answer has to do with how it works. The released peroxide does not act only where it sits on the surface, but penetrates the hard tooth tissue and spreads within it. Direct contact at every single point on the surface is therefore not necessary. The manufacturer expressly clears the preparation for use with bonded attachments.

During and shortly after whitening, teeth more often react to cold, heat and sweet. That is the best-known side effect, it is as a rule temporary, and it is not a sign that something is going wrong.

What we can do if it occurs: shorten the wear time, build in breaks, change the rhythm or use a desensitizing preparation. What matters is that you get in touch rather than silently discontinuing use. An adjusted application usually still reaches the goal.

The gums can react with irritation if gel spills beyond the tooth margin. That is why we practice the dosage together the first time. Too much gel does not whiten better; it only ends up on the gums.

Whitening products are classified by their hydrogen peroxide content. Preparations that release more than one tenth of a percent and at most six percent may be supplied exclusively to dental practices; the first application of each treatment cycle is carried out by a dentist or under direct dental supervision. The preparation used here, at roughly three and a half percent, falls within this range.

Over-the-counter products from drugstores or online retailers must be dosed markedly lower, which at the same time limits their possible effect. The full classification including the age limit is on the page on teeth whitening.

If you are undergoing aligner treatment anyway, the effort for a custom-made bleaching tray falls away. That is the only cost difference that can be generalized.