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Oral Anatomy > Primary Teeth > Flashcards

Primary Teeth Flashcards

1
Q

primary or baby teeth

A

deciduous dentition

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2
Q

secondary or adult teeth

A

permanent dentition

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3
Q

functions of the primary teeth

A
  • mastication
  • support lips and cheeks
  • formulation of speech
  • maintain arch space and room for secondary teeth
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4
Q

adult tooth ____ is due to premature primary tooth loss

A

crowding

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5
Q

there are no ____ in the primary dentition

A

premolars

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6
Q

____ replace the primary molars

A

premolars

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7
Q

maxillary adult teeth numbers ____ replace primary teeth ____

A

4-13 ; A-J

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8
Q

mandibular adult teeth numbers ____ replace primary teeth ____

A

20-29 ; K-T

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9
Q

succedaneous teeth

A

incisors (8 incisors replace the primary incisors)
canines (4 canines replace the primary canines)
premolars (8 premolars replace the primary MOLARS)

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10
Q

non-succedaneous teeth

A

molars (12 molars erupt distal to where the primary teeth were)

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11
Q

primary teeth crowns form between ____ in utero

A

4-6 months

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12
Q

all primary teeth are erupted by age ____

A

2-3

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13
Q

all roots are completed by age ___

A

about 3

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14
Q

age with no teeth erupted

A

birth - 6 months

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15
Q

age with primary teeth erupting

A

between 6 months and 2 years

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16
Q

age when only primary teeth are present

A

2-6 years; usually from ages 3-5 all primary teeth are erupted and no permanent replacement yet

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17
Q

age with mixed dentition (some primary/some permanent)

A

6-12 years

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18
Q

age with only permanent teeth present

A

12+ years

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19
Q

age when last permanent teeth (3rd molars) erupt

A

late teens-early 20s (17-21)

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20
Q

for permanent dentition, after crown formation is complete, there will be ____ until eruption and ____ until root formation is complete

A

3 years; 3 years

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21
Q

crown and root development of the primary teeth

A
  • crown formation begins about 6 mo in utero
  • crowns complete about 6 mo of age (about 10-12 mo after formation begins)
  • roots complete 1.5-3 yrs after emergence
  • exfoliation and replacement with succedaneous teeth: about 6-12 years of age
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22
Q

crown and root development of permanent teeth

A
  • crowns begin to form/calcify at birth to about 16 yrs of age
  • crowns complete about 3-4 yrs PRIOR to eruption
  • roots complete about 3 years after eruption
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23
Q

order of emergence of primary teeth (between 6 mo and 2+ years)

A

1st: mandibular central incisors (about 6 mo)
2nd: other incisors
3rd: first molars
4th: canines
5th: 2nd molars (about 2 years)

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24
Q

order of emergence of permanent teeth (between 6 years and late teens/early 20s)

A 
1st molars and mandibular central incsiors: 6 years
other incisors: 7-9 years
mandibular canines: 9-10 years
premolars: 10-12 years
maxillary canines: 12 years
second molars: 12 years
third molars: late teens/early 20s
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25
Q

primary teeth are ___ than secondary tooth of same name and also are ____

A

smaller; whiter

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26
Q

primary teeth have pronounced ____ and ____ bulges

A

CEJ constriction; cervical crown

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27
Q

primary teeth have relatively long ___ compared to ____; they also have thinner ___ and ____ layers

A

roots; crowns

enamel; dentin

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28
Q

primary teeth have more wear due to ____ and fewer ____

A

bruxing; anomalies

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29
Q

primary anterior teeth have prominent ____, no labial ____, ____ or ____

A

lingual cingula; depressions; mamelons; perikymata

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30
Q

anterior roots of primary teeth are thin ____ and bend ____ in the apical 1/3

A

mesiodistally; labially

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31
Q

primary molars have prominent ____ (bulges) with exaggerated cervical line curve _____

A

mesial cervical ridge; apically

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32
Q

primary molar crowns taper narrower ____

A

occlusally (have a narrow occlusal table)

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33
Q

primary molars are wide ____ vs. ____

A

mesiodistally; occlusogingivally

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34
Q

primary molars have ____ occlusal anatomy (few grooves or depressions), and ___ are larger than ____

A

shallow; second molars; first molars

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35
Q

primary molar root furcations are near the crown (small/short root trunks) and roots are ___ and ____

A

thin; slender

36
Q

primary molar roots are very ____ to make room for forming adult premolars within the jaw bones

A

divergent

37
Q

primary incisors are all longer ____ than ____ EXCEPT the maxillary central incisor is wider _____

A

incisocervically; mesiodistally; mesiodistally

38
Q

roots of primary teeth are relatively much ____ than crowns compared to permanent teeth (before resorption)

A

longer

39
Q

primary incisors have large, prominent ____ on the lingual ; marginal ridges most prominent on _____; mandibular lingual anatomy less distinct

A

cingula; maxillary central incisors

40
Q

primary incisors are quite wide ____ in the cervical third ; CEJ shape same as secondary , more curve on the ____

A

faciolingually; mesial

41
Q

primary incisor roots bend ____ in the apical third; maxillary incisor roots also bend ____ in the cervical half

A

facially; ligually

42
Q

maxillary central incisor is much wider ____ than ____ compared to the maxillary lateral; mesiodistal and faciolingual on mandibular incisors is almost equal

A

mesiodistally; faciolingually

43
Q

primary maxillary canine about as wide as it is long; mandibular canine is like the permanent: longer ____ than ____ and ____ than the maxillary

A

incisocervially; mesiodistally; narrower

44
Q

primary maxillary canine ____ contact is more cervical than the ____

A

mesial; distal (unique)

45
Q

teeth that have mesial contacts more cervical

A

primary maxillary canines and permanent mandibular 1st premolars

46
Q

primary maxillary canine has ____ longer than the ____ which is unique

A

mesial cusp ridge; distal cusp ridge

47
Q

teeth with mesial cusp ridge longer than distal cusp ridge

A

primary maxillary canines and permanent maxillary 1st premolars

48
Q

cingulum and marginal ridges more prominent on primary ____ canines

A

maxillary

49
Q

primary maxillary canines have ___ ridge with mesial and distal ____ (similar to secondary)

A

lingual; fossae

50
Q

cervical third of primary canines ____ than primary incisors (faciolingually)

A

thicker

51
Q

primary canines have pronounced ____ and ____ cervical bulges with pronounced concave “S” shape on ____ canines

A

labial; lingual; maxillary

52
Q

primary maxillary canine cusp tips positioned ____ to root axis, but are positioned ____ on mandibulars (as in secondary teeth)

A

labial; lingual

53
Q

cervical lines (CEJ) similar to secondary teeth with more curve on the ____

A

mesial

54
Q

roots of primary canines bend ____ in the apical third

A

labially

55
Q

primary maxillary canine wider ____ than _____ (less so on mandibulars)

A

mesiodistally; faciolingually

56
Q

primary mandibular canine outlines are ____ from the incisal

A

diamond shaped

57
Q

primary canine mandibular cingula may be slightly offset to the ____

A

distal

58
Q

both types of primary maxillary molars have ___ roots

A

three (mesiobuccal, distobuccal, and lingual)

59
Q

primary mandibular molars have ___ root

A

two (mesial and distal)

60
Q

primary maxillary molars are wider _____ and primary mandibular molars are wider ____

A

buccolingually; mesiodistally

61
Q

all primary molars are wider ____ than the premolars that will replace them

A

mesiodistally

62
Q

all primary molars have prominent ____ bulges on the ____

A

buccal; mesiobuccal

63
Q

all primary molars have cervical lines that curve ____ in the ____ half of the ___ surface

A

apically; mesial; buccal

64
Q

primary second molars resemble ____

A

secondary first molars

65
Q

primary second molars are ____ than permanent first molars

A

smaller

66
Q

crowns of primary maxillary second molars are similar to secondary maxillary 1st molars but are smaller; they have ____, ____, but ____ is almost equal to the ____ cusp

A
  • four cusps plus carabelli
  • oblique ridge
  • mesiobuccal; mesiolingual (mesiolingual cusp is largest on permanent first molars)
67
Q

primary second mandibular molar crowns are similar to secondary mandibular 1st molar crowns but are smaller; they have ____, but the ____ cusp is the widest

A
  • five cusps (3 buccal and 2 lingual) BUT the distobuccal cusp is the widest and mesiobuccal and distal cusps are almost the same size
  • on permanent mandibular 1st molars, the distal cusp is the smallest
68
Q

on primary 2nd mandibular molars, lingual cusps are slightly ___ than buccal

A

shorter

69
Q

on primary 2nd mandibular molars, ___ marginal ridge is higher and is crossed by a groove extending 1/3 down mesial surface of the crown

A

mesial

70
Q

on primary 2nd mandibular molars, you can see all 5 cusps from ____ proximal view

A

distal

71
Q

on primary 2nd mandibular molars, ____ root is narrower than the ___ root

A

distal; mesial

72
Q

on primary maxillary 1st molars, the ___ and ___ cusps are the most prominent, and the ____ and ____ cusps are very small

A

mesiobuccal; mesiolingual

distobuccal; distolingual

73
Q

on primary maxillary 1st molars, the ____ cusp is the longest and ____ is the sharpest; the ____ cusp can be absent like in permanent dentition

A

mesiobuccal; mesiolingual; distolingual

74
Q

on primary maxillary 1st molars, crowns are slightly wider ____ than ____

A

faciolingually; mesiodistally

75
Q

on primary maxillary 1st molars, buccal side is wider ____ than high ____ (similar to secondary); occlusal grooves may form ___ pattern

A

mesiodistally; occlusocervically; H

76
Q

crown resembles no other tooth; has 4 cusps, wider mesiodistally than high occlusocervically

A

primary mandibular 1st molar

77
Q

on primary mandibular 1st molars, the ____ cusp is the longest and largest cusp, while the ____ cusp is larger and sharper than the ____ cusp

A

mesiobuccal; mesiolingual; distolingual

78
Q

on primary mandibular 1st molars, there is a very prominent ____ cervical ridge or bulge with more apical cervical line in ___ half of the buccal surface

A

mesiobuccal; mesial

79
Q

primary mandibular 1st molars have prominent ___ transverse ridge and ____ marginal ridge with accentuated ___ tilt due to prominent mesiobuccal cervical ridge

A

mesial; mesial; lingual

80
Q

primary maxillary 1st molars have ___ shaped groove pattern

A

H

81
Q

primary pulps are relatively ___ in proportion to tooth than secondary pulps

A

larger

82
Q

in primary teeth, molar pulp chambers are located mostly in the ____ due to short root trunk

A

crown

83
Q

____ located beneath cusps

A

narrow pulp horns

84
Q

tooth eruption sequence for primary dentition

A 
centrals
laterals
1st molars
canines
2nd molars 
(mandibular USUALLY precede maxillay)
85
Q

1st permanent tooth to arrive in the mouth

A

mandibular 1st molar followed closely by mandibular central incisor or even at the same time

86
Q

_____ may erupt before any of the permanent maxillary teeth

A

mandibular laterals

87
Q

if you count to 6th position, child is at least ___ years old

A

6

Oral Anatomy (9 decks)

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