Dental Anatomy Quiz: Dentine Structure

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What indicates the presence of dead tracts in dentine?

Increase in size of tubules

Increase in globules or calcospherites

Decrease in interglobular dentine

Sealed off tubules at the pulpal ends (correct)

Where can interglobular dentine resembling holly leaves be found?

In the crown, near the mantle layer

In the root, near the cement

At the amelodentinal junction

About 0.2 mm from the amelodentinal junction (correct)

What is the outer layer of the root with few tubules called?

Hyaline layer of Hopewell-Smith (correct)

Mantle layer of the crown

Peritubular dentine

Granular layer of Tomes

What can be seen when viewing areas of dentine where tubules are cut transversely?

Bright rings around the dark space of the tubule Signup and view all the answers

What is the composition of peritubular dentine?

(Not specified in the text) Signup and view all the answers

What features can be identified using polarised light set-up?

Features that cannot otherwise be seen Signup and view all the answers

What type of incremental lines in dentine are 5-8 μm apart?

Von Ebner lines Signup and view all the answers

What is the name of the line that is associated with a general disturbance of growth in the days following birth?

Neonatal line Signup and view all the answers

What is the purpose of incremental lines in dentine?

To indicate the incremental nature of dentine deposition Signup and view all the answers

What is the name of the incremental line that is not a true growth line?

Contour line of Owen Signup and view all the answers

What is the typical spacing of Andresen lines in dentine?

16-30 μm Signup and view all the answers

What type of dentine is formed after the tooth has erupted?

Secondary dentine Signup and view all the answers

Which of the following is NOT a type of structural line in dentine?

Growth rings Signup and view all the answers

What is the term for the region of dentine where the odontoblasts are still actively producing dentine?

Predentine Signup and view all the answers

What is the junction between the enamel and dentine called?

Enamel-dentine junction Signup and view all the answers

What is the term for the direction of dentinal tubules between the enamel-dentine junction and the formative surface?

Corono-apical Signup and view all the answers

What is the term for the dentine formed before birth?

Neonatal dentine Signup and view all the answers

What is observed when examining the dentine/pulp border in mature teeth?

A typical pattern of dentinogenesis Signup and view all the answers

Why do the matrices of developing enamel and dentine have different staining properties?

Due to the composition of the matrices Signup and view all the answers

What is the difference between the development of mantle dentine and circumpulpar dentine?

Location of formation Signup and view all the answers

What can be observed in a ground section of a tooth in polarised light?

Dentine formation patterns Signup and view all the answers

Which tissue forms first during tooth development?

Dentine Signup and view all the answers

What is the characteristic appearance of the dentine/predentine junction?

Globular Signup and view all the answers

What is the function of the plexus of Raschkow?

To transmit pain signals to the brain Signup and view all the answers

What type of nerve fibers are likely to be found in the pulp?

Only unmyelinated Signup and view all the answers

What is the significance of axons in dentinal tubules?

They provide sensation to the dentin Signup and view all the answers

What is the characteristic of nerves in the pulp of a young tooth?

They are difficult to find Signup and view all the answers

What is the location of the cell bodies of nerve fibers in the pulp?

Outside the tooth, in the nerve ganglia Signup and view all the answers

How can you distinguish a young tooth from an old tooth by examining the pulp?

By the arrangement of nerves and nerve fibers Signup and view all the answers