INBDE (Integrated National Board Dental Examination) Practice Exam

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Which premolar is considered the smallest?

  1. Maxillary first premolar

  2. Maxillary second premolar

  3. Mandibular 1st premolar

  4. Mandibular second premolar

The correct answer is: Mandibular 1st premolar

The mandibular first premolar is considered the smallest premolar in the dental arch. This tooth typically has a more slender and constricted occlusal outline compared to the other premolars. The maxillary first premolar (Choice A) is larger in size with a more prominent buccal cusp, making it bigger than the mandibular first premolar. The maxillary second premolar (Choice B) is also larger than the mandibular first premolar and usually has two cusps (buccal and lingual), further distinguishing it in size. The mandibular second premolar (Choice D) is larger and has a more prominent occlusal surface compared to the mandibular first premolar.

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