Dentition - Lecture 8

Question 1

how many teeth do adults have? what are they?

Answer 1

32
- 8 incisors
- 4 canines
- 8 premolars
- 12 molars

Question 2

how many deciduous teeth are there? what are they?

Answer 2

20
- 8 incisors
- 4 canines
- 8 molars

Question 3

name all the parts of the tooth (inside)

Answer 3

enamel, dentin, pulp chamber, cervico-enamel junction, root canal, root

Question 4

name all the parts of the tooth (outside)

Answer 4

cusp, crown, cervico-enamel junction, cervix (neck), root

Question 5

what are the surfaces of the tooth?

Answer 5

• mesial (towards midline of mouth)
• distal (away from centre)
• lingual (tongue side)
• labial or buccal (l is lip, b is cheek)
• occlusal (chewing surface)

Question 6

how do teeth form?

Answer 6

crown to root (enamel first)

Question 7

where do deciduous teeth grow in utero?

Answer 7

inside the maxillary and mandibular crypts

Question 8

What happens to deciduous roots?

Answer 8

get reabsorbed to make room for adult tooth development

Question 9

what is the enamel surface?

Answer 9

non porous

Question 10

what teeth have the shortest roots?

Answer 10

the maxillary incisors due to the nasal aperture

Question 11

what teeth have the longest roots?

Answer 11

canines

Question 12

what is different about the cusps of the upper and lower premolars? how many are there

Answer 12

• upper premolars have 2 same sized cusps
• lower premolars have 2 different size cusps

Question 13

what are deciduous molars?

Answer 13

placeholders for permanent premolars