Free NBDE Trivia Questions and Answers

Question 1

The palatine bone of the mouth, separates the oral cavity from which body cavity?

Accepted Answer

Nasal Cavity

Answer

The palatine bone, along with the palatine processes of the maxilla, forms the hard palate, which serves as the roof of the oral cavity. Directly superior to the hard palate lies the nasal cavity. Therefore, the palatine bone acts as a structural barrier, effectively separating the oral cavity from the nasal cavity.

Question 2

Which nerve is responsible for causing elevation of the soft palate during the swallowing process?

Accepted Answer

Vagus nerve

Answer

The vagus nerve (Cranial Nerve X) is primarily responsible for the motor innervation of most muscles of the soft palate, including the levator veli palatini. This muscle's contraction elevates the soft palate, which is a critical action during swallowing to seal off the nasopharynx and prevent food or liquid from entering the nasal cavity.

Question 3

While repairing an injury to the temporomandibular joint, the surgeon notes significant amounts of hemorrhage from the artery that courses medial to the neck of the mandibular condyle. What artery  is injured?

Accepted Answer

Maxillary artery

Answer

The maxillary artery is a major branch of the external carotid artery that courses medial to the neck of the mandibular condyle. It supplies numerous structures in the deep face, including the temporomandibular joint (TMJ) region. Significant hemorrhage from this location during TMJ surgery strongly indicates injury to the maxillary artery due to its anatomical proximity.

Question 4

Which vessels supply the buccal gingiva overlying tooth #3?

Accepted Answer

Posterior superior alveolar vessels

Answer

Tooth #3 refers to the maxillary right first molar. The posterior superior alveolar vessels are responsible for supplying blood to the maxillary molars and premolars, as well as the buccal gingiva in that posterior region. Therefore, these vessels specifically provide the blood supply to the buccal gingiva overlying tooth #3.

Question 5

The blood supply to the periodontal ligament (PDL) comes from the:

Accepted Answer

Maxillary artery

Answer

The periodontal ligament (PDL) receives its essential blood supply primarily from branches of the maxillary artery. These branches, including the superior and inferior alveolar arteries, give off perforating arteries that enter the alveolar bone and supply the PDL from various aspects. This rich vascular network is crucial for the health, nutrition, and function of the PDL.

NBDE - National Board Dental Examination Practice Test

NBDE - National Board Dental Examination Practice Test

Free NBDE Trivia Questions and Answers