INBDE Oral Biology and Histology 2

Question 1

The epithelial rests of Malassez are remnants of which structure?

Accepted Answer

Hertwig's epithelial root sheath

Answer

The epithelial rests of Malassez are remnants of Hertwig's epithelial root sheath that persist in the periodontal ligament throughout life.

Question 2

Which salivary gland produces the most serous secretion?

Accepted Answer

Parotid gland

Answer

The parotid gland is entirely serous and produces a watery, enzyme-rich (amylase) secretion comprising about 25% of total saliva volume.

Question 3

Retzius lines in enamel represent:

Accepted Answer

Incremental lines of enamel matrix deposition

Answer

Striae of Retzius are incremental lines in enamel that represent successive layers of enamel matrix deposited during crown formation.

Question 4

Which cells produce the principal fibers of the periodontal ligament?

Accepted Answer

Fibroblasts

Answer

Fibroblasts are the most numerous cells of the periodontal ligament and are responsible for synthesizing and maintaining the collagen fibers.

Question 5

The neonatal line in primary tooth enamel marks the boundary between:

Accepted Answer

Prenatal and postnatal enamel

Answer

The neonatal line is a prominent stria of Retzius that marks the junction between prenatally and postnatally formed enamel in primary teeth.

INBDE - Integrated National Board Dental Exam Practice Test