Unit 304 Revision on Dental Anatomy

Question 1

How many parts are there to a tooth?

Answer 1

3 (Crown, Neck, Gingival Margin)

Question 2

What is the name of the outer layer of the crown?

Answer 2

Enamel

Question 3

What mineral crystals make up teeth?

Answer 3

Hydroxyapatite Crystals

Question 4

What percentage of Hydroxyapatite Crystals make up Enamel?

Answer 4

96%

Question 5

What cells make up Enamel?

Answer 5

Ameloblast Cells

Question 6

What is the next level under the tooth after Enamel?

Answer 6

ADJ [Amelodentinal Junction]

Question 7

What level do caries need to breach after Enamel to reach Dentine and become an established caries?

Answer 7

Amelodentinal Junction (ADJ)

Question 8

What level of tooth comes after ADJ?

Answer 8

Dentine

Question 9

What cells make dentine?

Answer 9

Odontoblast Cells

Question 10

How many types of dentine are there?

Answer 10

2 Types, Primary and Secondary

Question 11

What helps promote secondary dentine?

Answer 11

Calcium Hydroxide (Dycal)

Question 12

What percentage of Hydroxyapatite crystals makes up Dentine?

Answer 12

80%

Question 13

What layer comes after Dentine?

Answer 13

Pulp chamber

Question 14

What living parts of the tooth live in the pulp chamber?

Answer 14

Nerves and Blood Vessels

Question 15

What is the outer layer of protection for the root of the tooth?

Answer 15

Cementum

Question 16

What percentage of Hydroxyapatite crystals make up Cementum?

Answer 16

60%

Question 17

What cells make up Cementum?

Answer 17

Cementoblast Cells

Question 18

What name is used for the base of the root of the tooth?

Answer 18

Apex

Question 19

What is the opening (that allows nerves and blood vessels into teeth) at the base of the root of a tooth called?

Answer 19

Apical Foramen

Question 20

What is the name of the socket that the root lives in?

Answer 20

Lamina Dura

Question 21

What holds the root of a tooth in the Lamina Dura?

Answer 21

Periodontal Ligament

Question 22

What is the name used for the bone surrounding teeth?

Answer 22

Alveolar Bone

Question 23

How many roots does an upper molar typically have?

Answer 23

3 (Upper need more than lower to stay in the palate)

Question 24

Which tooth is the cusp of Carabelli located on?

Answer 24

UPPER FIRST permanent molar (U6)

Question 25

Which teeth are not found in a child dentition?

Answer 25

Premolars (D&E In children are molars, not premolars)

Question 26

How many pairs of Cranial Nerves are there?

Answer 26

12

Question 27

Which 4 cranial nerves are dental professionals most concerned with?

Answer 27

5th, 7th, 9th, 12th.

Question 28

What is the 5th, (and most important) cranial nerve in dentistry?

Answer 28

Trigeminal nerve

Question 29

What is a foramen?

Answer 29

Hole (or opening) that allows blood vessels and nerves to navigate through

Question 30

Which nerve supplies sensation to upper central incisors?

Answer 30

Anterior Superior Dental Nerve (ASDN)

Question 31

Which nerve supplies sensation to gingivae on the tongue side?

Answer 31

Lingual Nerve

Question 32

Which 2 nerves are injected for a XLA of UL7?

Answer 32

Posterior Superior Dental Nerve (PSDN) & Greater Palatine Nerve

Question 33

When scoring BPE, what does a “*” on a tooth mean?

Answer 33

Furcation is present (can see roots from recession)

Question 34

What number GDC Principle does the complaints principle come under?

Answer 34

Principle 5

Question 35

What are study models made of?

Answer 35

Gypsum (Dispose in Gypsum waste)

Question 36

What material is alginate made from?

Answer 36

Irreversible hydrocolloid