Mesiodens — ORE Part 1 MCQ
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Correct answer: C — Mesiodens
A mesiodens is a supernumerary tooth classified by its location: it occurs in the midline of the maxilla between the two central incisors. This location-based definition is the key discriminator, regardless of morphology. The conical and inverted features described are consistent with common presentations of mesiodens but do not define the classification. Paramolar teeth occur lingually or buccally to molars (not between incisors); distomolar teeth are fourth molars distal to the third molar (not anterior); peridens is not a standard classification term; supplemental teeth are normally shaped and properly aligned (inconsistent with the inverted, supernumerary description). Early identification of mesiodens is clinically important to prevent complications including delayed eruption, displacement of permanent incisors, and diastema.
Reference: Russell KA, Folwarczna MA. Mesiodens–diagnosis and management of a common supernumerary tooth. J Can Dent Assoc. 2003;69(06):362–366. https://pubmed.ncbi.nlm.nih.gov/11990044/ (Similar consensus definition in: Neville BW, Damm DD, Allen CM, Chi AC. Oral and Maxillofacial Pathology. 4th ed. 2016 – standard dental pathology reference).