Oral Biology - Intro to Dental Tissues

Question 1

What is meant by the anatomical crown?

Answer 1

The structure of the tooth and its root as it looks without the gums.

Question 2

Why is the clinical crown always smaller than the anatomical crown?

Answer 2

The clinical crown is what is observed, and the enamel is covered by the gums.

Question 3

What is the gingivae?

Answer 3

“Gums”

Question 4

Describe what the cervical margin is.

Answer 4

The boundary where the enamel covers the tooth and the cementum covering the root.

Question 5

Describe what the term “Gingival Recession” is.

Answer 5

The erosion of the gingivae from the cervical margin, exposing the root of the tooth structure.

Question 6

Guess the terms

Answer 6

Question 7

What is the enamel?

Answer 7

The outer protective layer of the crown. It protects the dentine and pulp from damage.

Question 8

Which substance in your body is stronger than your bones?

Answer 8

The enamel; it is the strongest substance in your body.

Question 9

What is the amelodentinal junction?

Answer 9

The boundary between the enamel and the underlying dentine.

Question 10

The healthiest teeth are…

Answer 10

are translucent and slightly yellow, not opaque and bright white.

Question 11

What is dentine?

Answer 11

Dentine is the main supporting structure of the tooth and is the second hardest tissue in the body after enamel.

Question 12

Name the ideal properties of Tooth

Answer 12

• Strong
• Hard
• Wear resistant
• Resistant to chemical damage
• Ability to respond to insult/damage
• Ability to repair
• Aesthetic

Question 13

Which type of bur is required to cut through enamel?

Answer 13

• Diamon
• Tungsten Carbide

Question 14

*** is the calcified or mineralized tissue layer covering the root of the tooth which sits inside the gum socket.

Answer 14

Cementum

Question 15

The tooth ** is the innermost layer of your tooth. It contains nerves, blood vessels, specialized cells and connective tissues, which provide nutrients for your tooth.

Answer 15

Pulp

Question 16

Which part of the crown keeps the tooth alive?

Answer 16

The pulp

Question 17

Tubular structures are found in…

Answer 17

The dentine. 20% of it is organic, such as collagen fibres.

Question 18

Prisms structures give the *** its hardness.

Answer 18

Enamel

Question 19

DIfference between sound and carious dentine?

Answer 19

Sound - healthy
Carious - diseased dentine (soft)

Question 20

Describe this feature.

Answer 20

Dentinal tubules are the means by which the pulp and mineralised tissues surrounding the dentine (enamel and cementum) communicate.

Question 21

Name the three pulp functions.

Answer 21

• Dentine formation
• Defence and repair
• Sensory

Question 22

Guess the features

Answer 22

Question 23

The lateral canal is…

Answer 23

An accessory (lateral) canal is any branch of the main pulp canal or chamber that communicates with the external surface of the root.

Question 24

The apical delta

Answer 24

refers to the branching pattern of small accessory canals and minor foramina seen at the tip or apex of some tooth roots.

Question 25

What feature of the pulp extends into the cusps of the tooth?

Answer 25

The pulp horns

Question 26

Describe these features

Answer 26

Radiographic Apex: The tip or end of the root as determined radiographically.
Apical Foramen: Opening of the apex.

Question 27

Which structure becomes increasingly porous as you get closer to its edge?

Answer 27

Dentine

Question 28

If pulpitis occurs, does the tissue swell?

Answer 28

No, as it is enclosed within a rigid chamber

Question 29

Describe what is happening here

Answer 29

The anchorage/support of the tooth is reduced progressively. The dentinal tubules become exposed to the exterior surface.

Question 30

Name the four functions of the enamel?

Answer 30

• Tooth decay (cavities).
• Erosion (wear and tear).
• Infection.
• Teeth sensitivity (to heat, cold and sweets).