INBDE (Integrated National Board Dental Examination) Practice Exam

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The posterior lingual sulcus denture extension is limited by which two muscles?

  1. Buccinator and Genioglossus

  2. Palatoglossus and Superior constrictor

  3. Masseteric notch and Buccinator

  4. Genioglossus and Pterygomandibular raphe

The correct answer is: Palatoglossus and Superior constrictor

The posterior lingual sulcus denture extension is limited by the Palatoglossus and Superior constrictor muscles. The other options are incorrect as they are not associated with the posterior lingual sulcus or denture extensions. The Buccinator muscle is involved in cheek movement and the Genioglossus muscle is responsible for protruding and retracting the tongue. The Masseteric notch is a small depression on the zygomatic arch and the Pterygomandibular raphe is a fibrous band that connects the pterygoid plates of the sphenoid bone and the mandible, neither of which are associated with the posterior lingual sulcus or denture extensions. Therefore, option B is the correct answer.

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