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oral cavity - BDS 1 > tooth morphology - elcock :) > Flashcards

tooth morphology - elcock :) Flashcards

1
Q

what is the outer surface at the front of the mouth/adjacent to lips

A

labial

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2
Q

outer surface of posterior teeth

A

buccal

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3
Q

inner surface of teeth upper

A

palatal

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4
Q

where teeth meet

A

occlusal

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5
Q

inner surface of teeth lower

A

lingual

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6
Q

closer to the midlien

A

mesial

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7
Q

further from midline

A

distal

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8
Q

top surface of front teeth

A

incisal

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9
Q

shape of permanent incisors

A

chisel shape

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10
Q

mesial angle of incisors

A

90

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11
Q

distal shape of incisors

A

more rounded

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12
Q

how long can canines roots be

A

3x crown size

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13
Q

how many cusps are on the pre molars

A

2 cusps on occlusal surface

unqual size

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14
Q

which is the largest cusp on pre molars

A

buccal

exept upper 5 equal

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15
Q

how many roots do pre molars have

A

1

except for upper 4 (2)

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16
Q

what is the crown outline for upper premolars

A

oval

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17
Q

what is the crown outline for lower premolars

A

round

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18
Q

shape of lower permanent molars

A

retangular

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19
Q

shape of upper permanent molars

A

rhomboid/diamoind

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20
Q

how many roots do lower molars have

A

2

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21
Q

how many roots do upper molars have

A

3

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22
Q

primary vs permanent teeth

A 
primary:
smaller
more bulbous 
larger pulp chamber
whiter (less mineralsied 92%)
23
Q

what is different about tooth D compared to permanent dentiton 4

A

mix of premolar and molar

not like any other tooth

24
Q

what can be seen over time on primary teeth

A

attrition
wearing of teeth due to lower mineralisation
root resporption

25
Q

primary molar roots are…

A

flared

26
Q

primary dentition tooth D feature

A

large tubercle of Zuckerkandl

27
Q

pulp morphology and dentine permanent vs primary

A

pulp is larger in primary

therefore dentine layer is thinner

28
Q

tooth form when tooth breaches the mucosa

A

roots half formed

crown partially out

29
Q

how long does it take to form a tooth

A

9 yrs

30
Q

when the crown is formed what is it found within before eruption

A

crypt

31
Q

how long does it take to form a primary tooth

A

30 months

32
Q

what is the primary order of eruption

A 
A
B
D
C
E
33
Q

what does primary develpment time range from

A

23-44 months

34
Q

when are roots complete in primary teeth

A

after eruption 18 months

35
Q

when does crown formation complete after birth

A

3mn to 1 year after birth

36
Q

when does crown calification start

A

3mnth to 6 mnth in utero

37
Q

how does resorption of a tooth occur

A

roots resorb
cementum and dentine resorb
mobilty of the tooth increases
PDL breaks down

38
Q

eruption phases

A

pre
pre functional
post

39
Q

mechanisms of erution

A

root growth
bone deposition
pupal cell proliferation
periapical hydrostatic pressure

40
Q

what erupt first upper or lower?

A

lower teeth first

41
Q

eruption order and age

A 
6 - 6yrs old
1 - 7yrs old
2 - 8yrs old
4 - 9yrs old
5 - 10yrs old
3 - 11yrs old
7 -12yrs old
8- 18yrs old
42
Q

what is different about tooth 3

A

does not erupt until roots are almost fully formed

43
Q

how long does it take for crown to form

A

3 yrs

44
Q

how long does it take for roots to form

A

6 yrs

45
Q

how to work out when crown frmation is complete

A

eruption age - 3 yrs

46
Q

how to work out when crown calcification starts

A

eruption age - 6yrs

47
Q

how to work out when roots are formed

A

eruption age + 3 yrs

48
Q

eruption dates between females and males

A

females before males

49
Q

what are teeth befroe birth called

A

natal teeth

50
Q

eruption date ranges for teeth

A

6 mnths

51
Q

how long are primary teeth in the mouth for

A

5-6yrs

52
Q

what appears black in radiography

A

air/space

ie radiolucent

53
Q

what block x rays

A

teeth
bone
fillings ect

oral cavity - BDS 1 (66 decks)

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