Oral Embryology & Histology M6 Quiz

Which type of dentin separates mantle dentin from circumpulpal dentin?

Globular

T OR F? Interglobular dentin is associated with vitamin B deficiency.

False

Sclerotic dentin is found in each of the following areas EXCEPT one. Which one is the EXCEPTION?

Living odontoblasts

Which type of dentin forms to protect and maintain the vitality of the pulp?

Reactionary

Odontoblastic injury during a cavity preparation usually results in which of the following forms of dentin?

Tertiary dentin

T OR F? Secondary dentin is the result of insufficient mineralization

False

Mineralized tubules are associated with which type of dentin?

Sclerotic

Which term is preferred to describe when newly recruited (replacement) odontoblasts begin depositing dentin?

Reparative dentin

T OR F? Dentinal tubules contain odontoblast processes, nerve terminals, and dentinal fluid

True

Dentin is responsive to the environment.

True

The major organic component of dentin is _______.

collagen

The appositional growth of dentin is apparent in which feature?

Incremental lines

Peritubular dentin is not found in the dentinal tubules of interglobular dentin.

True

Which of the following best defines sclerotic dentin?

Obliterated tubules, found mainly in areas of attrition, abrasion, fracture and caries.

The granular layer of Tomes is located in the _________.

dentin of the root

Which type of dentin borders the pulp?

Predentin

Osteodentin is a form of reparative dentin that resembles cartilage.

False

Which type of dentin is formed prior to tooth function and is the major component of the crown and root of the tooth?

Circumpulpal dentin

Dead tracts develop when odontoblasts die from trauma or old age.

True

_______ are extensions of the odontoblast process into enamel.

Enamel spindles

Incremental lines in dentin are also known as:

lines of von ebner

Dentin is _______ than enamel

More elastic

The junction between dentin and enamel is scalloped.

True

The defining characteristic of globular dentin is

interglobular spaces

Which is the following is a hypermineralized collar of dentin surrounding the tubules?

Peritubular dentin

Secondary dentin is deposited more quickly than primary dentin.

False

T or F? Odontoblastic processes taper in diameter, being largest near the dentinoenamel junction and smallest near the pulp

False

T or F: Odontoblasts have a singular process when they first differentiate.

False

T OR F? Dead tracts develop when odontoblasts die from trauma or old age.

True

T or F: Odontoblast organelles are usually located within the cytoplasmic process.

False

T or F: Mantle dentin contains larger collagen fibers than circumpulpal dentin.

True