Lecture 7

Question 1

During which stage of tooth formation does the primary dental lamina invaginate into the underlying mesenchyme?
a. Mineralization stage
b. Root development stage
c. Proliferation phase
d. Histodifferentiation phase

Answer 1

Proliferation

Question 2

What structure is formed when a proliferation center and condensation of the underlying mesenchyme combine during the proliferation phase?
a. Dental papilla
b. Dental bud
c. Alveolar mucosa
d. Dental follicle

Answer 2

Dental bud

Question 3

In which histodifferentiation phase is the enamel organ composed of external adamantine epithelium (EAE) and internal adamantine epithelium (IAE)?
a. Histodifferentiation at the level of the enamel organ
b. Histodifferentiation in the dental papilla
c. Histodifferentiation of the mesenchyme around the bell
d. Dentinogenesis - Morphodifferentiation and mineralization of dentin

Answer 3

Histodifferential at the level of the enamel organ

Question 4

What cells are mainly found in the dental pulp during histodifferentiation in the dental papilla?
a. Fibroblasts
b. Odontoblasts
c. Ameloblasts
d. Schwann cells

Answer 4

Fibroblasts

Question 5

What is the primary function of the odontoblastic layer in the dentin?
a. Synthesis of collagen fibers
b. Formation of hydroxyapatite crystals
c. Protection against external stimuli
d. Sensory perception of temperature and pressure

Answer 5

Formation of hydroxyapatite crystals

Question 6

Which dentin type is deposited later under physiological conditions and may have irregular structure?
a. Primary dentin
b. Secondary dentin
c. Tertiary dentin
d. Mantle dentin

Answer 6

Secondary dentin

Question 7

What is the major constituent of dentin in terms of percentage?
a. 10% mineral substances
b. 20% organic substances
c. 70% mineral substances
d. 10% water

Answer 7

70# mineral substances

Question 8

What is the primary function of dental pulp, besides dentin formation?
a. Enamel secretion
b. Sensory perception
c. Protection against decay
d. Nutritional support

Answer 8

Sensory perception

Question 9

Which theory suggests that the painful stimulus is transmitted to the pulp periphery through the mobility of odontoblastic processes?
a. Direct innervation theory
b. Transduction theory
c. Hydrodynamic theory
d. Pain and the pulpo-dentinal complex theory

Answer 9

Hydrodynamic theory

Question 10

At what stage of amelogenesis does the ameloblast secrete a partially mineralized matrix?
a. Matrix formation stage
b. Secretory stage
c. Maturation stage
d. Mineralization stage

Answer 10

Matrix formation