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Dental Anatomy: Dentine Structure

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Questions and Answers

What is the main reason for the formation of Interglobular dentine?

Changes in odontoblastic process orientation

Incomplete fusion of calcified globules (correct)

Overlapping of dentinal tubules

Irregularities in the dentino-enamel junction

What is the characteristic shape of the dentino-enamel junction?

Circular

Triangular

Rectangular

Scalloped (correct)

What is the main component of the dentino-cemental junction?

Enamel rods

Cementum

Dentin tubules

Collagen fiber bundles (correct)

Where is the most sensitive area of dentine located?

At the dentino-enamel junction Signup and view all the answers

What type of dentine has a large, curved layer outline?

Interglobular dentine Signup and view all the answers

Why do dentinal tubules not cross the Interglobular dentine?

Due to the different orientation of odontoblastic process Signup and view all the answers

What is the pattern of mineralization in the mantle dentine area?

Linear Signup and view all the answers

What is the thickness of the mantle dentine?

10-20 um Signup and view all the answers

What is the direction of collagen fibers in relation to the dentinal tubules?

Right or oblique angle Signup and view all the answers

What is the type of dentine formed to produce the typical shape of the tooth?

Primary dentine Signup and view all the answers

What is the pattern of mineralization in the circumpulpal dentine just below the mantle dentine?

Globular Signup and view all the answers

What is the process of dentine formation that occurs throughout life?

A continuous process at a steadily diminishing rate Signup and view all the answers

What is the primary secretory product of odontoblasts?

Intertubular dentine Signup and view all the answers

How are the collagen fibers arranged in the mantle dentine?

At right angle to the dentine surface Signup and view all the answers

What is the characteristics of peritubular dentine?

About 40% more mineralized than intertubular dentine Signup and view all the answers

What is the direction of the apatite crystal long axis in relation to the fibrils direction?

Parallel to the fibrils direction Signup and view all the answers

What is the appearance of peritubular dentine in ground section through the dentinal tubules?

Translucent rings Signup and view all the answers

What happens to the odontoblastic process in decalcified section?

It appears shrunken Signup and view all the answers