DDS Dental Anatomy and Histology 3

Question 1

The junction between enamel and dentin is characteristically scalloped to:

Accepted Answer

Prevent enamel fracture by interlocking the two tissues

Answer

Allow passage of odontoblast processes into enamel

Answer

Increase surface area for diffusion of nutrients

Answer

Provide a pathway for enamel spindles

Question 2

Which type of enamel rod orientation is found in the cervical third of the crown?

Accepted Answer

Rods incline cervically (apically)

Answer

Rods incline occlusally

Answer

Rods run horizontally

Answer

Rods are randomly arranged

Question 3

The incremental lines in dentin that correspond to the neonatal period are called:

Accepted Answer

Neonatal line

Answer

Owen's contour lines

Answer

Andresen lines

Answer

Imbrication lines

Question 4

Which cell type in dental pulp is responsible for synthesizing collagen type III (reticulin fibers)?

Accepted Answer

Fibroblasts

Answer

Odontoblasts

Answer

Macrophages

Answer

Dendritic cells

Question 5

The zone of Weil (cell-free zone) in dental pulp is located:

Accepted Answer

Immediately below the odontoblast layer

Answer

Adjacent to the predentin

Answer

In the central pulp core

Answer

At the apex of the pulp chamber

Question 6

Bundle bone in the alveolar process is characterized by:

Accepted Answer

Sharpey's fiber insertions from the PDL into the bone

Answer

High density of osteocytes without fiber insertions

Answer

Absence of blood vessels

Answer

Lamellar structure parallel to the alveolar crest