Black Spots on Teeth: Causes, Diagnosis & Treatment Options

Black/dark spots on teeth signal underlying pathology requiring professional evaluation. Self-diagnosis risks missing progressive disease.

Differential Diagnosis

Cause	Appearance	Key Features	Treatment
Dental caries	Dark pits/fissures, sticky on probe	Most common; bacterial acid demineralization	Filling, crown, RCT if deep
Tartar (calculus)	Yellow-brown-black deposits at gumline	Calcified plaque; rough, supra/subgingival	Scaling/root planing
Extrinsic stain	Uniform/diffuse brown-black	Coffee, tea, red wine, tobacco, chlorhexidine	Prophylaxis, air polishing, bleaching
Tetracycline staining	Gray-brown bands (developmental)	Antibiotic during odontogenesis (prenatal–age 8)	Veneers, crowns (bleaching limited)
Fluorosis	White streaks → brown pitting (severe)	Excess fluoride during enamel formation	Microabrasion, resin infiltration, veneers
Pulp necrosis	Gray-black discoloration of single tooth	Post-trauma or deep caries; non-vital	RCT + internal bleaching/crown
Amalgam tattoo	Blue-gray macular lesion on gingiva/mucosa	Amalgam particles implanted during restoration	Benign; biopsy if uncertain
Systemic (rare)	Generalized discoloration	Addison's (adrenal), hemochromatosis, alkaptonuria	Medical management

Diagnostic Approach

1. Clinical exam + transillumination
2. Bitewing/periapical radiographs
3. Vitality testing (cold, EPT)
4. Periodontal charting

Prevention

• Twice-daily fluoride brushing + daily flossing
• Professional cleaning 6-monthly (3–4 monthly if high risk)
• Limit staining beverages; rinse after
• Address dry mouth (xerostomia accelerates decay/stain)

Any new or changing dark spot warrants dental evaluation—early intervention preserves tooth structure and reduces cost.