Primary Teeth Flashcards
1
Q
primary or baby teeth
A
deciduous dentition
2
Q
secondary or adult teeth
A
permanent dentition
3
Q
functions of the primary teeth
A
- mastication
- support lips and cheeks
- formulation of speech
- maintain arch space and room for secondary teeth
4
Q
adult tooth ____ is due to premature primary tooth loss
A
crowding
5
Q
there are no ____ in the primary dentition
A
premolars
6
Q
____ replace the primary molars
A
premolars
7
Q
maxillary adult teeth numbers ____ replace primary teeth ____
A
4-13 ; A-J
8
Q
mandibular adult teeth numbers ____ replace primary teeth ____
A
20-29 ; K-T
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)
10
Q
non-succedaneous teeth
A
molars (12 molars erupt distal to where the primary teeth were)
11
Q
primary teeth crowns form between ____ in utero
A
4-6 months
12
Q
all primary teeth are erupted by age ____
A
2-3
13
Q
all roots are completed by age ___
A
about 3
14
Q
age with no teeth erupted
A
birth - 6 months
15
Q
age with primary teeth erupting
A
between 6 months and 2 years
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
17
Q
age with mixed dentition (some primary/some permanent)
A
6-12 years
18
Q
age with only permanent teeth present
A
12+ years
19
Q
age when last permanent teeth (3rd molars) erupt
A
late teens-early 20s (17-21)
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
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
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
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)
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
25
primary teeth are ___ than secondary tooth of same name and also are ____
smaller; whiter
26
primary teeth have pronounced ____ and ____ bulges
CEJ constriction; cervical crown
27
primary teeth have relatively long ___ compared to ____; they also have thinner ___ and ____ layers
roots; crowns
| enamel; dentin
28
primary teeth have more wear due to ____ and fewer ____
bruxing; anomalies
29
primary anterior teeth have prominent ____, no labial ____, ____ or ____
lingual cingula; depressions; mamelons; perikymata
30
anterior roots of primary teeth are thin ____ and bend ____ in the apical 1/3
mesiodistally; labially
31
primary molars have prominent ____ (bulges) with exaggerated cervical line curve _____
mesial cervical ridge; apically
32
primary molar crowns taper narrower ____
occlusally (have a narrow occlusal table)
33
primary molars are wide ____ vs. ____
mesiodistally; occlusogingivally
34
primary molars have ____ occlusal anatomy (few grooves or depressions), and ___ are larger than ____
shallow; second molars; first molars
35
primary molar root furcations are near the crown (small/short root trunks) and roots are ___ and ____
thin; slender
36
primary molar roots are very ____ to make room for forming adult premolars within the jaw bones
divergent
37
primary incisors are all longer ____ than ____ EXCEPT the maxillary central incisor is wider _____
incisocervically; mesiodistally; mesiodistally
38
roots of primary teeth are relatively much ____ than crowns compared to permanent teeth (before resorption)
longer
39
primary incisors have large, prominent ____ on the lingual ; marginal ridges most prominent on _____; mandibular lingual anatomy less distinct
cingula; maxillary central incisors
40
primary incisors are quite wide ____ in the cervical third ; CEJ shape same as secondary , more curve on the ____
faciolingually; mesial
41
primary incisor roots bend ____ in the apical third; maxillary incisor roots also bend ____ in the cervical half
facially; ligually
42
maxillary central incisor is much wider ____ than ____ compared to the maxillary lateral; mesiodistal and faciolingual on mandibular incisors is almost equal
mesiodistally; faciolingually
43
primary maxillary canine about as wide as it is long; mandibular canine is like the permanent: longer ____ than ____ and ____ than the maxillary
incisocervially; mesiodistally; narrower
44
primary maxillary canine ____ contact is more cervical than the ____
mesial; distal (unique)
45
teeth that have mesial contacts more cervical
primary maxillary canines and permanent mandibular 1st premolars
46
primary maxillary canine has ____ longer than the ____ which is unique
mesial cusp ridge; distal cusp ridge
47
teeth with mesial cusp ridge longer than distal cusp ridge
primary maxillary canines and permanent maxillary 1st premolars
48
cingulum and marginal ridges more prominent on primary ____ canines
maxillary
49
primary maxillary canines have ___ ridge with mesial and distal ____ (similar to secondary)
lingual; fossae
50
cervical third of primary canines ____ than primary incisors (faciolingually)
thicker
51
primary canines have pronounced ____ and ____ cervical bulges with pronounced concave "S" shape on ____ canines
labial; lingual; maxillary
52
primary maxillary canine cusp tips positioned ____ to root axis, but are positioned ____ on mandibulars (as in secondary teeth)
labial; lingual
53
cervical lines (CEJ) similar to secondary teeth with more curve on the ____
mesial
54
roots of primary canines bend ____ in the apical third
labially
55
primary maxillary canine wider ____ than _____ (less so on mandibulars)
mesiodistally; faciolingually
56
primary mandibular canine outlines are ____ from the incisal
diamond shaped
57
primary canine mandibular cingula may be slightly offset to the ____
distal
58
both types of primary maxillary molars have ___ roots
three (mesiobuccal, distobuccal, and lingual)
59
primary mandibular molars have ___ root
two (mesial and distal)
60
primary maxillary molars are wider _____ and primary mandibular molars are wider ____
buccolingually; mesiodistally
61
all primary molars are wider ____ than the premolars that will replace them
mesiodistally
62
all primary molars have prominent ____ bulges on the ____
buccal; mesiobuccal
63
all primary molars have cervical lines that curve ____ in the ____ half of the ___ surface
apically; mesial; buccal
64
primary second molars resemble ____
secondary first molars
65
primary second molars are ____ than permanent first molars
smaller
66
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
- four cusps plus carabelli
- oblique ridge
- mesiobuccal; mesiolingual (mesiolingual cusp is largest on permanent first molars)
67
primary second mandibular molar crowns are similar to secondary mandibular 1st molar crowns but are smaller; they have ____, but the ____ cusp is the widest
- 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
on primary 2nd mandibular molars, lingual cusps are slightly ___ than buccal
shorter
69
on primary 2nd mandibular molars, ___ marginal ridge is higher and is crossed by a groove extending 1/3 down mesial surface of the crown
mesial
70
on primary 2nd mandibular molars, you can see all 5 cusps from ____ proximal view
distal
71
on primary 2nd mandibular molars, ____ root is narrower than the ___ root
distal; mesial
72
on primary maxillary 1st molars, the ___ and ___ cusps are the most prominent, and the ____ and ____ cusps are very small
mesiobuccal; mesiolingual
| distobuccal; distolingual
73
on primary maxillary 1st molars, the ____ cusp is the longest and ____ is the sharpest; the ____ cusp can be absent like in permanent dentition
mesiobuccal; mesiolingual; distolingual
74
on primary maxillary 1st molars, crowns are slightly wider ____ than ____
faciolingually; mesiodistally
75
on primary maxillary 1st molars, buccal side is wider ____ than high ____ (similar to secondary); occlusal grooves may form ___ pattern
mesiodistally; occlusocervically; H
76
crown resembles no other tooth; has 4 cusps, wider mesiodistally than high occlusocervically
primary mandibular 1st molar
77
on primary mandibular 1st molars, the ____ cusp is the longest and largest cusp, while the ____ cusp is larger and sharper than the ____ cusp
mesiobuccal; mesiolingual; distolingual
78
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
mesiobuccal; mesial
79
primary mandibular 1st molars have prominent ___ transverse ridge and ____ marginal ridge with accentuated ___ tilt due to prominent mesiobuccal cervical ridge
mesial; mesial; lingual
80
primary maxillary 1st molars have ___ shaped groove pattern
H
81
primary pulps are relatively ___ in proportion to tooth than secondary pulps
larger
82
in primary teeth, molar pulp chambers are located mostly in the ____ due to short root trunk
crown
83
____ located beneath cusps
narrow pulp horns
84
tooth eruption sequence for primary dentition
```
centrals
laterals
1st molars
canines
2nd molars
(mandibular USUALLY precede maxillay)
```
85
1st permanent tooth to arrive in the mouth
mandibular 1st molar followed closely by mandibular central incisor or even at the same time
86
_____ may erupt before any of the permanent maxillary teeth
mandibular laterals
87
if you count to 6th position, child is at least ___ years old
6
