INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the more common cusp form on mandibular 2nd premolar?

  1. H

  2. Y

  3. U

  4. S

The correct answer is: Y

Cusp forms are ridges on teeth that increase the surface area and functionality of the tooth. The mandibular 2nd premolar typically has 2 cusps, with one being larger and more prominent than the other. This larger cusp is known as the lingual cusp and is located on the lingual (tongue side) of the tooth. Option B, Y, refers to the larger cusp on the mandibular 2nd premolar, making it the more common cusp form. Options A, H, C, U and D, S, do not pertain to the anatomy of the mandibular 2nd premolar, making them incorrect choices.

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