A cosmetic dentistry procedure that lightens discoloration caused by aging, dietary habits, or smoking, performed under dentist supervision using either in-office systems or custom-tray take-home kits.
Indication
- Extrinsic discoloration from chromogenic beverages such as tea, coffee, cola, and red wine
- Surface stains on teeth caused by smoking
- Yellowing due to age-related dentin discoloration
- Internal discoloration of a single non-vital tooth after trauma (non-vital bleaching)
- Limited tetracycline- or fluorosis-related staining (results may be limited)
- Color matching prior to esthetic restorative treatment
Preparation
- Clinical examination; active caries, gum disease, and lost fillings should be addressed beforehand
- Dental scaling (recommended in advance)
- Identification of the cause of discoloration (extrinsic or intrinsic)
- Patient is informed that fillings, crowns, or laminates do not change color with whitening
- Assessment of any history of tooth sensitivity
How it's performed
- Gums are protected with a special gel or barrier
- In in-office application, 25-40% hydrogen peroxide gel is applied to the tooth surface
- In some systems light or laser is used for activation (evidence is limited)
- The gel is left for 15-20 minutes and may be refreshed 2-3 times per session if needed
- In take-home systems, low-dose peroxide gel is applied via custom trays for several days
- Repeat sessions may be planned based on the degree of discoloration
Post-procedure
- Avoid staining foods (tea, coffee, red wine, dark sauces) for the first 24-48 hours
- Fluoride toothpaste is recommended for temporary sensitivity
- The durability of results depends on lifestyle habits; an annual maintenance application may be needed
- Regular dental scaling reduces re-accumulation of stains
- If fillings or crowns are present, color match is reassessed
Risks
- Temporary tooth sensitivity (hot/cold) — the most common side effect, usually lasting 24-72 hours
- Gum irritation and short-term burning sensation (especially with poorly fitting trays)
- Existing fillings and crowns do not change color; color mismatch may occur
- Excessive or unsupervised use can cause enamel roughness and increased sensitivity
- Expectations may not always be met; success is limited in tetracycline staining
FAQ
Is whitening permanent?
It is not entirely permanent. Depending on diet, smoking, and hygiene, discoloration may return within 1-3 years. Periodic maintenance applications are recommended.
I have tooth sensitivity, can this procedure be done?
Existing sensitivity may temporarily increase after the procedure. The dentist may prefer lower-dose, longer-term home systems. Desensitizing toothpaste may be recommended beforehand.
Can it be done during pregnancy?
Because it is an elective procedure, it is recommended to postpone whitening during pregnancy and breastfeeding. There is no evidence of necessity in this period.
Are over-the-counter whitening toothpastes sufficient?
These products may reduce extrinsic stains but are insufficient for intrinsic (dentin) discoloration. Their abrasive content may also damage enamel surface over the long term.
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