What kind of stain is caused by tetracycline?

Tetracycline-related staining is classified as intrinsic because it occurs when the antibiotic is absorbed into the developing teeth during childhood when the teeth are still forming. This absorption leads to changes in the enamel and dentin, resulting in a permanent color change, typically a grayish or brownish hue. Unlike extrinsic stains, which occur on the surface of the teeth due to external factors like food, beverages, or tobacco, intrinsic stains are embedded within the tooth structure itself. Therefore, intrinsic staining from tetracycline is significant as it indicates that the staining is not merely on the surface but affects the tooth’s internal composition. Understanding this distinction is key for dental professionals when diagnosing and treating different types of dental discoloration.