Question 1

Which of the following principal fiber groups insert into the cementum only?&#10;A) horizontal fibers&#10;B) dentoperiosteal fibers&#10;C) interradicular fibers&#10;D) transseptal fibers&#10;E) circular fibers

Accepted Answer

Transseptal fibers insert into the cementum of adjacent teeth, not into the alveolar bone, making them unique in this regard.

Question 2

Identify the gland at the tip of the arrow  &#10;A) glands of Blandin-Nuhn&#10;B) posterior mucous gland&#10;C) glands of von Ebner&#10;D) glands of Serres&#10;E) glands of Littre

Accepted Answer

The gland at the tip of the arrow represents the glands of von Ebner, which are located in the submucosal tissue in the posterior part of the tongue. These glands secrete lingual lipase, which helps in the digestion of fatty acids in the stomach. The other options, such as glands of Blandin-Nuhn, posterior mucous gland, glands of Serres, and glands of Littre, are not located in the posterior part of the tongue and do not secrete lingual lipase.

Question 3

Fordyce's granules are nonfunctional&#10;A) mucous minor salivary glands&#10;B) sebaceous glands&#10;C) sweat glands&#10;D) mixed minor salivary glands&#10;E) serous minor salivary glands

Accepted Answer

Fordyce's granules are ectopic sebaceous glands that are found on the mucosal surfaces, such as the lips and oral cavity. They are nonfunctional in the sense that they are not associated with hair follicles and do not serve a clear purpose in these locations.

Question 4

A patient presents at the dentist with a tooth that has suddenly become discolored and looks dark. The dentist should&#10;A) extract the tooth&#10;B) perform a root canal treatment&#10;C) test the pulp for viability&#10;D) place a crown on the tooth&#10;E) bleach the tooth

Accepted Answer

The sudden discoloration and darkness of the tooth suggest that there may be damage to the pulp inside the tooth. Testing the pulp for viability will help determine the extent of the damage and the appropriate treatment needed. Extraction or root canal treatment may be necessary depending on the outcome of the pulp test. Placing a crown or bleaching the tooth will not address the underlying issue of pulp damage.

Question 5

Which of the following regions of the oral cavity possesses all three types of minor salivary glands (serous only, mucous only, and mixed)?&#10;A) cheek&#10;B) hard palate&#10;C) lip&#10;D) tongue&#10;E) uvula

Accepted Answer

The tongue is the only region of the oral cavity that possesses all three types of minor salivary glands. The serous glands are located at the base of the tongue, the mucous glands are present throughout the body of the tongue, and the mixed glands are located at the junction of the body and base of the tongue.

Question 6

Which of the following possesses specialized mucosa?&#10;A) ventral surface of the tongue&#10;B) attached gingiva&#10;C) buccal mucosa&#10;D) dorsal surface of the tongue&#10;E) free gingiva

Accepted Answer

The dorsal surface of the tongue possesses specialized mucosa, which includes taste buds and papillae, unlike the other options which have lining or masticatory mucosa.

Question 7

Which of the following principal fiber groups contacts neither cementum nor bone?&#10;A) horizontal fibers&#10;B) dentoperiosteal fibers&#10;C) interradicular fibers&#10;D) transseptal fibers&#10;E) circular fibers

Accepted Answer

Circular fibers are part of the gingival fiber apparatus and encircle the tooth like a ring. They do not attach to the cementum or bone, unlike the other fibers listed, which are involved in attaching the tooth to the surrounding alveolar bone or cementum.

Question 8

Which of the following structures initiates cusp formation?&#10;A) enamel navel&#10;B) enamel knot&#10;C) enamel cord&#10;D) enamel tuft&#10;E) enamel lamella

Accepted Answer

Enamel knot is a cluster of cells that initiate cusp formation during tooth development. The other structures listed do not play a role in cusp formation.

Deck 15: Digestive System: Oral Cavity