Dra. Cléo Salustiano In this article
SummaryHow does each type of teeth whitening work?Which type is right for me, and what can whitening not fix?FAQRead nextTypes of teeth whitening: in-office, at-home, laser and combined
Quick summary of this article+
Professionally supervised whitening types are in-office, with a stronger gel and sometimes laser or LED; supervised at-home, with custom trays and a milder gel; combined, which joins both; and internal, for a tooth darkened after a root canal. The choice depends on the stain, sensitivity and routine. Fillings and veneers do not whiten.
There are three main types of professionally supervised teeth whitening: in-office whitening, applied by the dentist with a stronger gel, sometimes with laser or LED light; supervised at-home whitening, done by the patient with custom trays and a milder gel; and combined, or hybrid, whitening, which joins both. There is also internal whitening for teeth that darkened after a root canal.
In clinical practice, many patients have already tried pharmacy products, whitening toothpastes, strips and home recipes, and arrive frustrated by small results or sensitivity. Others ask for a specific method, such as laser, without knowing the choice depends on the type of stain, sensitivity, available time and existing fillings or veneers.
In this article, Dr. Cléo Salustiano (CRO-SP 170844), who offers laser whitening and supervised at-home whitening in Mooca, East Zone of São Paulo, explains how each type works and what no whitening can do.
This article comes from Dr. Cléo Salustiano's dental office in Mooca, São Paulo (care in English, Portuguese and Spanish). See the teeth whitening page to learn how the treatment is done here and book your assessment.
How does each type of teeth whitening work?
All types of whitening work the same way: a hydrogen or carbamide peroxide gel penetrates enamel and dentin and breaks down the pigment molecules that darken the tooth. What changes is the gel concentration, contact time, who applies it and where.
In-office whitening uses a gum barrier and a stronger gel in sessions of about an hour, sometimes activated by laser or LED light, with results visible from the first session. Supervised at-home whitening uses custom trays and a milder gel worn daily for a few weeks; it gives consistent results and usually less sensitivity when used exactly as directed. Combined whitening starts with office sessions for speed and consolidates the shade at home.
Internal whitening is different: it treats a single tooth that darkened after a root canal or trauma. The gel is placed inside the tooth by the dentist and replaced over a few visits. It can be combined with whitening of the other teeth.
Which type is right for me, and what can whitening not fix?
The right type depends on the stain, tooth sensitivity, available time, routine and the shade you hope for. Yellowing from age, coffee, tea and wine usually responds well to any technique; gray staining from medicines such as tetracycline responds more slowly and with limits. Before starting, cavities and gum inflammation must be treated, and a professional cleaning is usually done first.
Fillings, veneers, crowns and dentures do not change color, so front-tooth restorations may need replacing afterwards to match. Sensitivity is the most common side effect and is usually temporary; the dentist can adjust concentration, space out applications and recommend desensitizers. Whitening is not recommended during pregnancy or breastfeeding, and home mixtures with baking soda, lemon or charcoal can wear enamel without truly whitening.
In Mooca, Dr. Cléo Salustiano offers in-office laser whitening and supervised at-home whitening, with an assessment first to recommend the right method, every day from 8 a.m. to 10 p.m., including Sundays and holidays, near Bresser-Mooca subway station, in Portuguese, English and Spanish.
What are the main types of teeth whitening?
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The three most used professionally supervised types are in-office whitening, applied by the dentist with a stronger gel; supervised at-home whitening, with custom trays and a milder gel; and combined whitening, which joins both. Internal whitening is a separate option for teeth that darkened after a root canal.
Which type of whitening is most effective?
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No single type is best for everyone. In-office and supervised at-home whitening reach similar results when properly indicated; in-office is faster at first, and at-home usually causes less sensitivity. Combined whitening joins the advantages. The choice depends on the stain, sensitivity and routine.
Is laser whitening better than at-home whitening?
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Not necessarily. Laser or LED light is used in some in-office techniques to activate the gel, giving faster results in early sessions. At-home whitening takes a few weeks but tends to cause less sensitivity. Both can reach similar results; the recommendation depends on the case and patient preference.
Do over-the-counter whitening products work?
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Whitening toothpastes remove surface stains but do not change the tooth's inner color. Strips and over-the-counter gels may have limited effect and, without an assessment, raise the risk of sensitivity and gum irritation. Home mixtures with baking soda, lemon or charcoal can wear enamel. Professional supervision is safer.
Does whitening work on veneers or fillings?
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No. Composite, veneers, crowns and dentures do not change color with whitening gel. When there are restorations on the front teeth, whitening is usually done first and the restorations are replaced afterwards to match the new shade. This is planned at the assessment.
How long do whitening results last?
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Results usually last one to three years, depending on habits such as coffee, tea, wine and smoking. Good hygiene, regular cleanings and occasional touch-ups with at-home trays, when recommended by the dentist, help maintain the shade. Teeth darken gradually rather than all at once.
Where can I get teeth whitening in Mooca, São Paulo?
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In Mooca, Dr. Cléo Salustiano (CRO-SP 170844) sees patients at Rua Hipódromo, 1141, every day from 8 a.m. to 10 p.m., including Sundays and holidays. She offers in-office laser whitening and supervised at-home whitening, with an assessment first to recommend the right technique.
