Incisors

Question 1

What is a cingulum?

Answer 1

• The bulge or prominence of enamel found on the cervical third of the lingual surface of all anterior teeth

Question 2

What are marginal ridges?

Answer 2

• An elevation of enamel which forms the mesial or distal margin of the lingual surface of an anterior tooth or the occlusal surface of a posterior tooth

Question 3

How large is the crown of an upper central incisor compared to an upper lateral incisor?

Answer 3

Larger than lateral incisors

Question 4

What is the mesio-incisal angle like on an upper central incisor?

Answer 4

• Sharp

Question 5

What is the disto-incisal angle like on an upper central incisor?

Answer 5

• More rounded

Question 6

What is the lingual surface of an upper central incisor like?

Answer 6

• Concave with mesial and distal marginal ridges which meet at the neck of the tooth forming a convex cingulum

Question 7

What are mammelons?

Answer 7

Cusplets found on the incisal surface of incisors

Question 8

What type of teeth are mammelons more likely to be fond?

Answer 8

Deciduous teeth

Question 9

What way does the crown of a n upper central incisor lean?

Answer 9

• Leans lingually

Question 10

On what side of the upper central incisor does the cervical region have greater undulation?

Answer 10

The mesial side

Question 11

What is the shape of an upper lateral incisor like compared to an upper central incisor?

Answer 11

Not as rectangular

• Much less bulky and more slender
• The cervical region is narrowed mesio-distally, giving it a long mesial surface

Question 12

What is the mesio-incisal angle like in an upper lateral incisor?

Answer 12

• Slightly rounded

Question 13

What is the disto-incisal angle like in an upper lateral incisor?

Answer 13

• Short distal surface with a pronounced rounding of the angle

Question 14

What can the lingual side of an upper lateral incisor contain which is a pronounced area for caries to form?

Answer 14

An enclosed depression or fossa

Question 15

On what side of the upper lateral incisor does the cervical region have greater undulation?

Answer 15

The mesial side

Question 16

What is the crown of a lower central incisor like?

Answer 16

• Appears flat and almost symmetrical

Question 17

Which incisal angle is marginally rounder in a lower central incisor?

Answer 17

• The disto-incisal angle

Question 18

What does the crown of a lower central incisor look like from a mesio or distal aspect?

Answer 18

Appears wedge-shaped and leans lingually

Question 19

On what side of the lower central incisor is there greater undulation?

Answer 19

The mesial surface

Question 20

Does the lower central incisor have marginal ridges and a cingulum?

Answer 20

Yes, has faint marginal ridges and a small cingulum

Question 21

What does the crown of a lower lateral incisor look like?

Answer 21

• Fan-shaped

Question 22

What are the incisal angles of the lower lateral incisor like?

Answer 22

• Mesio-incisal angle is sharp and the disto-incisal angle is rounded

Question 23

What does the crown of a lower lateral incisor look like from a mesial or distal point of view?

Answer 23

• Crown is wedge-shaped and leans lingually

Question 24

On what side of the lower lateral incisor is there greater undulation?

Answer 24

The mesial surface

Question 25

What does the lower lateral incisor look like when viewed from the incisal edge?

Answer 25

• The crown is slightly twisted on the root to follow the dental arch

Question 26

What is the name for a dwarfed lateral incisor?

Answer 26

Peg laterals