Angle Classification — ORE Part 1 MCQ

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EasyOrthodonticsAngle ClassificationORE Part 1

In the permanent dentition, the mesiobuccal cusp of the maxillary first molar occludes distal to the buccal groove of the mandibular first molar. What is the Angle molar classification?

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Correct answer: A — Class III

The correct answer is **Class III**. In Angle classification, Class I is present when the mesiobuccal cusp of the maxillary first molar occludes with the buccal groove of the mandibular first molar. If that maxillary cusp lies mesial (anterior) to the groove, the relationship is Class II. If it lies distal (posterior) to the groove, as described here, it is Class III. Class II division 2 is not determined by the molar relationship alone: it requires a Class II relationship together with characteristic retroclination of the maxillary central incisors. Therefore, no information about incisor inclination is needed to identify the Class III molar relationship, and “cannot be classified” is incorrect.

Reference: StatPearls. Orthodontics, Malocclusion. PubMed record, 2023. https://pubmed.ncbi.nlm.nih.gov/37276298/