Types of Tooth Discoloration
1. Extrinsic stains (surface). Stains on the enamel from coffee, tea, red wine, tobacco, and certain foods. These respond well to professional whitening.
2. Intrinsic discoloration (internal). Yellowing or graying inside the tooth from aging, trauma, certain antibiotics (tetracycline), or excessive fluoride in childhood. Harder to whiten; often needs veneers or bonding.
3. Single dark tooth (non-vital). A dead nerve or old root canal can make one tooth noticeably darker than its neighbors. Treatment is internal bleaching or a crown.
4. Age-related darkening. Enamel thins with age, exposing yellower dentin underneath. Combination of whitening and veneers often works best.
The right treatment depends on the type — which is why a brief exam matters before buying over-the-counter whitening.
Treatment Options
Professional teeth whitening. In-office whitening with high-concentration gel and a curing light, or take-home custom trays. Much more effective than drugstore strips. Results in one visit or 2 weeks.
Dental bonding. Tooth-colored resin applied to cover discoloration. Single visit, lower cost than veneers. Good for minor issues; may stain over time.
Porcelain veneers. Thin porcelain shells bonded to the front of teeth. Covers deep intrinsic staining that won't whiten. Long-lasting and natural-looking. Two visits.
Crowns. For severely discolored or structurally weakened teeth, a full crown covers the entire tooth. Often paired with a root canal if the tooth is non-vital.
Internal bleaching. For a single dead tooth, we place a whitening agent inside the tooth from behind. Often brightens dramatically without needing a veneer.
What Causes Teeth to Darken?
- Coffee, tea, red wine, cola, turmeric, soy sauce
- Tobacco (smoking or chewing)
- Aging (enamel thins, dentin shows through)
- Poor oral hygiene
- Certain medications (tetracycline, doxycycline, some antihistamines)
- Excessive fluoride in childhood (fluorosis)
- Tooth trauma (internal bleeding inside the tooth)
- Root canal treatment (can sometimes cause darkening over time)
- Old metal fillings or crowns with metal underneath
Is Whitening Safe?
Professional whitening is safe when done correctly. Temporary sensitivity is common but short-lived. We use dental-grade gels that are stronger and safer than store-bought products, and we custom-fit trays to protect your gums.