How can I lighten a dark dye

Teeth whitening: whitening

The teeth become darker and usually take on a blotchy, yellowish-brown or - in the case of dead nerves - a grayish color. Cleaning with polishing pastes or powder blasting devices only has a very superficial effect and is almost completely ineffective in the case of tooth discoloration from dead tooth nerves.

Chemically, there are two methods of tooth whitening: In the case of reduction bleaching, which only has a temporary effect, sulfur compounds are used that remove oxygen from the tooth discoloration. Since the tooth surfaces treated in this way inevitably come into contact with oxygen again, the bleaching effect is only short-lived.

The more resistant oxidation bleaching uses hydrogen peroxide or various chlorine compounds. They release oxygen, which permanently destroys the dyes through an oxidation process.

The different bleaching procedures

Bleaching of "dead" teeth ("walking bleaching")

Most blood components and their decay products discolour the tooth crown after a few years after a root canal treatment (for example when removing an inflamed tooth nerve) or accidental effects.

The dentist opens the dead tooth and places a cotton ball soaked with hydrogen peroxide solution in the cavity of the upper tooth nerve for three to five days. At the end of the treatment, the cavity is closed with a tooth-colored filling material.

Bleaching in the dental practice ("Office bleaching")

The dentist applies a concentrated whitening agent directly to the tooth while protecting the environment and briefly activates it with light or a soft laser. The peroxide breaks down and the resulting active oxygen unfolds its bleaching effect. Since stronger concentrations can be used in the dental practice, bleaching is usually done in one or two sessions.

There are also bleaching systems on the market that use a plastic rail loaded with the bleaching agent. This is inserted by the dentist and removed after about an hour. After two to three repetitions, clear results are visible.

Home bleaching

After the instruction by the dentist in the practice, the patient receives the materials required for bleaching home. There he has to fill a splint made for him with bleaching gel every day and wear it for a certain period of time. The application time is also here about two to three weeks.

Bleaching - At Home Or In The Practice?

The bleaching of discolored living (vital) teeth is possible either in the dental practice (office bleaching) or at home (home bleaching).

With both methods, the tooth surface must be cleaned thoroughly before the actual bleaching. In addition, the gums must be in a healthy condition. If there are already tooth-colored fillings in the teeth, they will naturally not be bleached at the same time. Renewing these fillings after the actual bleaching treatment is then aesthetically advantageous.

Under no circumstances should the bleaching agent come into contact with the gums, as this could cause serious damage. Therefore, control and monitoring by the dentist is essential. After completion of the treatment, the lightened enamel should be hardened with fluorides.

A warning is given against bleaching processes for household use. Products for whitening teeth are not cosmetics, but medical devices and are subject to the Medical Devices Act. They may only be used in a dental practice or at home under dental supervision.

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