A patient arrives displaying discolored teeth with brownish stains that exhibit fluorescent glow under UV light, suggesting a primary diagnosis of____________?
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Answer: D. Tetracycline staining of teeth
Explanation
Tetracycline incorporation into developing teeth causes intrinsic discoloration with bright fluorescence under UV light. The antibiotic chelates with calcium during mineralization, permanently binding within the dentin matrix structure. Ultraviolet light exposure causes these tetracycline-stained teeth to exhibit a distinct bright yellow-to-brown glow. Tetracyclines cross the placental barrier and are secreted in breast milk, affecting developing primary and permanent teeth. Discoloration severity depends on the dosage, duration of administration, and stage of dental development. Natural sunlight or UV dental lights readily elicit the characteristic fluorescence in affected teeth.
Clinicians avoid prescribing tetracycline antibiotics to pregnant women and children during active tooth formation years. Aesthetic treatments such as porcelain veneers or crowns are often requested by patients with severe staining. Careful medication history taking prevents accidental intrinsic dental staining during early childhood development. Porphyria causes reddish-brown intrinsic tooth discoloration termed erythrodontia with red fluorescence under UV light. Amelogenesis imperfecta is a genetic enamel defect presenting with yellow-brown or pitted teeth without drug fluorescence. Hutchinson teeth exhibit notched incisors and mulberry molars resulting from congenital syphilis infection.
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