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Flashcards in Tooth Anatomy Deck (72):
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What is the correct terminology for tooth formation?

Odontogenesis

1

What is the first stage of tooth formation?

GROWTH

Bud -formation of tooth begins
Cap - cells of tooth increases
Bell -different tissues form/shape developed

2

What is the second stage of tooth formation?

Calcification

3

What forms enamel?

Ameloblasts

4

What is the final stage of development?

Eruption

5

What age do deciduous teeth begin to erupt?

Approx. 8 months

6

What age is the eruption of deciduous teeth complete?

29 months (2 1/2)

7

What is bifurcation?

When roots divide into two

8

What is trifurcation

When roots split into 3

9

What is exfoliation?

Shedding of the crown leaving room for permanent teeth

10

What is reabsorption?

Roots disintegrate

11

What is the name of the cells that cause reabsorption?

Osteoclasts

12

How many teeth are in the permanent set?

32

13

How many teeth are in the deciduous set?

20

14

What is the pulp made up of?

Nerves and blood vessels

15

What is enamel made up of?

96% mineral crystals arranged as prisms

16

What are the mineral crystals that make up enamel called?

Calcium hydroxyapatite

17

Where do enamel and dentine meet?

At the amelodentinal junction (ADJ)

18

What is the name of cells that make up dentine?

Odontoblasts

19

What are odontoblasts composed of?

Hollow tubes

20

What are the two types of dentine?

Primary
Secondary

21

What forms cementum?

Cementoblasts

22

Where does cementum meet?

Cemento-enamel junction (CEJ)

23

At what age should have all deciduous teeth erupted?

2-3

24

Which teeth are premolars?

4s and 5's

25

At what age does exfoliation take place

Between 5 and 12 years old

26

At what age do upper deciduous central incisors erupt?
(URA & ULA)

8-12 months

27

At what age do upper deciduous lateral incisors erupt?
(URB & ULB)

9-13 months

28

At what age do upper deciduous canines erupt?
(URC & ULC)

16-22 months

29

At what age do upper deciduous first molars erupt?
(URD & ULD)

13-19 months

30

At what age do the upper deciduous second molars erupt?
URE & ULE

23-31 months

31

At what age do the lower deciduous incisors erupt?
LLA & LRA

6-19 months

32

At what age do the lower deciduous lateral incisors erupt?
LLB & LRB

10 - 16 months

33

At what age do the lower deciduous canines erupt?
LLC & LRC

17-23 months

34

At what age do the lower deciduous first molars erupt?
LLD & LRD

14-18 months

35

At what age do the lower deciduous second molars erupt?
LLE & LRE

25-33 months

36

At what age do the upper central incisors erupt?

7-8 years

37

At what age do the upper lateral incisors erupt?

8-9 years

38

At what age do the upper canines erupt?

11-12 years

39

What age do the upper first pre molars erupt?
4's

10-11 years

40

At what age do the upper second premolars erupt?
5's

10-12 years

41

At what age do the upper first molars erupt?
6's

6-7 years

42

At what age do the upper second molars erupt?
7's

12-13 years

43

At what age do the upper third molars erupt?
Wisdom teeth

17-21

44

At what age do the lower central incisors erupt?

6-7

45

At what age do the lower lateral incisors erupt?

7-8

46

At what age do the lower canines erupt?

9-10 years

47

At what age do the lower first premolars erupt?
4's

10-12

48

At what age do the lower second premolars erupt?
5's

11-12

49

At what age do the lower first molars erupt?
6's

6-7

50

At what age do the lower second molars erupt?
7's

11-13

51

At what age do the lower third molars erupt?
Wisdom teeth

17-21

52

What is mastication?

Chewing

53

Which are the only premolars to have two roots?

Upper 4's

54

How many roots do upper molars have?

3

55

How many roots do lower molars have?

2

56

How many cusps do premolars have?

2

57

How many cusps do upper molars have? *

4

58

The cusp of carabelli is located on which tooth?

Upper 6's

59

How many cusps do lower molars have?*

4
* lower 6's have 5

60

What are genetic disturbance factors of dental development?

Palatial placement if canines
Down's syndrome
Jaw/tooth size

61

What are environmental disturbance factors of dental development

Alcohol
Smoking
Herpes
Rubella contraction during pregnancy
Heroin/cocaine
Tetracycline
Radiation

62

What is anodontia?

Absence of one or more teeth

63

What is hypodontia?

Lack of development of teeth

64

What are supernumerary teeth?

Extra teeth

65

What is macrodontia?

Abnormally large teeth

66

Why is microdontia?

Abnormally small teeth

67

What is synodontia?

Fusion if two adjacent teeth

68

What is enamel dysplasia?

Faulty development if enamel

69

What are hutchinson incisors?

Small and peg shaped
Caused by mother having syphillis

70

What is a Cingulum?

A u or w shaped ridge on the palatal/lingual surface

71

What is mamelon?

Ridges on the incisal edge