Intrinsic Staining
Discolouration originating within the tooth structure itself, incorporated into enamel or dentine during or after tooth formation.
Full Definition
Intrinsic staining refers to pigmentation that is embedded within the enamel, dentine, or pulp tissue, as distinct from surface deposits. Common causes include tetracycline use during tooth development, dental fluorosis, trauma resulting in pulp haemorrhage, and systemic conditions such as erythroblastosis fetalis. Because the colour is structural rather than superficial, it cannot be removed by polishing alone. Editors must distinguish it from extrinsic staining, which is amenable to prophylaxis and polishing. In clinical notes the term should not be abbreviated to 'staining' without qualification.
Usage
Usage note: Do not use 'intrinsic staining' as a catch-all for any deep discolouration; specify the aetiology where known in clinical documentation.
In Context
- "The clinician noted moderate intrinsic staining consistent with tetracycline exposure during the patient's childhood years." — Clinical progress note
- "Unlike extrinsic staining, intrinsic staining requires bleaching or restorative intervention rather than polishing." — Patient education handout