DDS Trivia 2

Question 1

Which cranial nerve is responsible for the general sensory innervation of the teeth and gums?

Accepted Answer

Trigeminal nerve (CN V)

Answer

The trigeminal nerve (CN V) provides the primary sensory innervation to the teeth, periodontal ligament, and gingiva via its maxillary and mandibular divisions.

Question 2

What is the hardest substance in the human body?

Accepted Answer

Enamel

Answer

Dental enamel is the hardest biological material in the human body, composed of approximately 96% hydroxyapatite mineral by weight.

Question 3

Which teeth are most commonly affected by pericoronitis?

Accepted Answer

Mandibular third molars

Answer

Pericoronitis most commonly affects partially erupted mandibular third molars (wisdom teeth), where the overlying gingival flap traps bacteria.

Question 4

The 'rule of 1s' in local anesthesia refers to which landmark for inferior alveolar nerve blocks?

Accepted Answer

1 cm above the occlusal plane of the mandibular molars

Answer

The target for the inferior alveolar nerve block is approximately 1 cm (or one fingerbreadth) above the occlusal plane of the mandibular molars at the medial ramus.

Question 5

Which enzyme in saliva initiates carbohydrate digestion in the oral cavity?

Accepted Answer

Salivary amylase (ptyalin)

Answer

Salivary amylase (ptyalin) begins starch digestion in the mouth by cleaving alpha-1,4 glycosidic bonds in polysaccharides.

DDS - Doctor of Dental Surgery Practice Test

DDS - Doctor of Dental Surgery Practice Test

DDS Trivia 2