Molar-Incisor Hypomineralisation — NDEB AFK MCQ
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Correct answer: D — Permanent first molars and permanent incisors
Molar-incisor hypomineralisation (MIH) is a qualitative enamel defect characterised by demarcated opacities (white, yellow, or brown) affecting one or more permanent first molars and frequently the permanent incisors. The aetiology is multifactorial and not fully understood (prenatal/perinatal/postnatal insults during the first 3 years of life). Severely affected molars have soft, porous enamel prone to post-eruptive breakdown (PEB), rapid caries, and hypersensitivity. Prevalence is approximately 12-15% globally.
Reference: Neville – Oral and Maxillofacial Pathology, 4th ed., 2016; Weerheijm KL – Eur J Paediatr Dent, 2003