Primary Dentition Flashcards
(128 cards)
1
Q
Teeth exfoliate ____
A
Between 7-12 years (just before the permanent teeth erupt)
2
Q
Resorption begins:
A
1-2 years after root formation is completed
3
Q
Where does resorption begin?
A
Apex of tooth
4
Q
Why are primary teeth important? (5)
A
- Mechanical preparation of food
- Maintenance of space for permanent teeth
- Speech
- Appearance
- Stimulate growth of mandible and maxilla
5
Q
What happens if we have early loss of the primary dentition?
A
Severe crowding may occur
6
Q
The primary central incisor is replaced by:
A
Permanent central incisor
7
Q
The primary lateral incisor is replaced by:
A
Permanent lateral incisor
8
Q
The primary canine is replaced by the:
A
Permanent canine
9
Q
The primary 1st molar is replaced by the:
A
Permanent 1st premolar
10
Q
The primary 2nd molar is replaced by the:
A
Permanent 2nd premolar
11
Q
The 20 permanent teeth that replace the primary teeth:
A
Succedaneous teeth
12
Q
The other 12 permanent teeth which erupt distal to the primary second molars are called:
A
Accessional teeth
13
Q
All the molars are considered:
A
Accessional teeth
14
Q
In comparison with the permanent teeth, the primary teeth are:
A
Smaller in overall crown size and dimensions
15
Q
In comparison to permanent teeth, the crowns of primary teeth are more:
A
Bulbous
16
Q
In comparison to permanent teeth, the crowns of primary teeth are more bulbous because of:
A
More prominent/pronounced cervical ridges
17
Q
In comparison to permanent teeth, the primary teeth have a more _____ cervical constriction
A
Pronounced
18
Q
Primary teeth have a pronounced cervical constriction due to a constricted neck of the tooth due to:
A
Prominence of cervical bulge/ridges
19
Q
Describe the color of primary teeth compared to permanent teeth:
A
Primary teeth are lighter in color
20
Q
Describe the enamel of primary teeth compared to permanent teeth:
A
Enamel is thinner and has consistent thickness
21
Q
The enamel thickness in permanent teeth is not:
A
Consistent
22
Q
In a sectioned permanent tooth, where is the enamel the thickest?
A
In the occlusal 1/3
23
Q
Describe the pulp chambers in primary teeth (compared to permanent teeth)
A
Large pulp chambers with prominent pulp horns
24
Q
Describe the dentin thickness in primary teeth vs. permanent teeth
A
Dentist thickness is limited/thin over the pulp horns
25
In primary teeth compared to permanent teeth, the enamel rods are:
In a different direction than in permanent teeth
26
In primary teeth, the enamel rods at the cervix slope _____ or ______ instead of _____ as in the permanent tooth
Horizontally or occlusally ; gingivially
27
The occlusal surfaces in primary teeth are relatively smaller than in permanent teeth, this is considered:
Occlusal convergence
28
The roots in primary teeth are proportionately:
Longer and more slender
29
The roots on molars in primary teeth:
Have a shorter root trunk
30
The roots of posterior primary teeth are:
Very flared
31
Why are the roots of posterior primary teeth so flared?
Because the permanent teeth develop in between the roots of the molars
32
The primary maxillary central incisors develop from:
4 lobes
33
From a labial view of the primary maxillary central incisors, the root lengths is proportionately ____ than in the permanent central incisor
Greater
34
The root to crown ratio for the max primary central incisor:
The root to crown ratio for a max permanent central incisor:
10/6
13/10
35
The primary central incisors ___ width is greater than its ____ width
MD; IG
36
From a lingual view,
-the anatomy of the primary maxillary central incisor is similar to the _____
- the mesial and distal marginal ridges are _____
- the cingulum is very ____ and extends upwards towards ____
- the DI angle is ____
-permanent maxillary central incisor
-well developed
-pronounced ; incisal edge
-more rounded
37
On the primary maxillary central incisor, what is responsible for dividing the lingual fossa partially into MD and DL fossa?
Cingulum
38
The primary maxillary central incisor from mesial and distal views, has extremely well developed ______ in the ___ of the tooth.
Lingual and facial cervical ridges; cervical 1/3
39
In the primary maxillary central, describe the shape of the root:
Cone-shaped, long, slender
40
Describe the crown dimensions in the primary maxillary central incisor:
MD>BL
MD> IG
41
On a primary maxillary central incisor, the crown tapers from:
Facial to lingual
42
The primary maxillary lateral incisor is similar to the primary central incisor except for: (2)
1. IG length is greater than the MD width
2. DI angle is more rounded than the central incisor
43
The primary maxillary canine:
-has how many cusps?
-what feature is very pronounce?
- what cusp slope is longer?
-1
-cervical constriction
-mesial (opposite of permanent)
44
Primary maxillary canine from a facial aspect:
-Compare the cusp height in the primary to the permanent
-Describe the location of the M and D contacts
- cusp height is longer in primary than in permanent
-M and D contacts areas are at the same level
45
The primary maxillary canine from a lingual aspect:
- what anatomical features are present? (4)
1. Mesial and distal marginal ridges
2. Lingual ridge
3. ML and DL fossa
4. Cingulum
46
From a lingual aspect of the primary maxillary canine-
The root is:
Very long- almost twice as long as the crown
47
The primary mandibular central incisor:
- Is the ____ tooth in the mouth
- the root is ___ & ___
-the root is _____ compared to the crown
- there are pronounced ______ on the facial and lingual aspects
- smallest
- long and slender
-2x the length of crown
- cervical buldges
48
The primary mandibular lateral incisor:
- The crown is similar to the central incisor but is slightly _____
- The lingual anatomy may be ____ due to ____ & _____
- The disto-incisal angle is ____
-longer
-more pronounced due to more prominent marginal ridges and a deeper lingual fossa
-slightly rounded
49
The primary mandibular canine:
- compared to the primary maxillary canine this canine does not have as much ______and can be said to have _____
Cervical constriction; thicker neck
50
The primary mandibular canine:
- The cervical ridges are ____ compared to the primary maxillary canine
Not as pronounced as primary maxillary canine
51
The primary mandibular canine is not as wide _____ compared to the primary maxillary canine
FL
52
The primary mandibular canine:
- The distal cusp slope is ____ than the mesial cusp slope
Longer
53
Primary or permanent?
1. Crowns are more bulbous
2. Darker in color
3. Thicker enamel of varied thickness
4. Pronounced cervical constriction
5. Large pulp chambers with prominent pulp horns
6. Longer root trunks
1. Primary
2. Permanent
3. Permanent
4. Primary
5. Primary
6. Permanent
54
The primary maxillary 1st molar resembles:
Permanent premolar
55
The primary maxillary 2nd molar resembles the:
Permanent maxillary 1st molar
56
The mandibular 1st molar resembles:
No other tooth in the mouth
57
The mandibular 2nd molar resembles:
Permanent mandibular 1st molar
58
The primary maxillary 1st molars resembles a ____ and has ____ roots: name them
Premolar- 3 roots, 2 buccal and 1 lingual
59
The primary maxillary 1st molar has a ____ shaped occlusal surface with ____ cusps
Triangular shaped; 3-4 cusps
60
If the primary maxillary 1st molar has 3 cusps they are _____. If it has 4 cusps they are ____.
MF, DF and lingual
MF, DF, ML, DL
61
The primary maxillary 1st molar from a buccal view:
-very ____ relative to width of crown
- Cusps are ____
- Much ____ than maxillary 2nd molar
- Compare the MB and DB cusps
-narrow cervix
-poorly defined
- much smaller tooth (almost premolar-like)
- MB cusp> DB cusp
62
The primary maxillar 1st molar: from a buccal view:
- The roots are ____, ____, and ____
- ____ roots are visible
- The root trunk is ___ (CEJ to furcation)
- ____ buccal present
- long, slender, widely spread
- All 3 roots
- very short
- 2 buccal
63
The primary maxillary 1st molar from a lingual view:
- The crown converges:
- # cusps present
- The ___ cusp is the largest and longest cusp on this tooth
- Describe the DL cusp
- From this view what root(s) do we see? Describe it
- lingually
- 1 or 2
- ML
- Small or absent DL cusp
- 1 lingual root, largest root
64
The primary maxillary 1st molar: mesial and distal views:
- The crown is the widest in the ____
The crown is is narrower _____ (buccolingually) than on the ____
- cervical 1/3
-distal; mesial
65
The primary maxillary 1st molar has a very prominent on the _____ aspect.
Convexity; MB
66
What is an outstanding characteristic in regard to the primary maxillary 1st molar?
Prominent convexity on the MB aspect
67
The primary maxillary 1st molar: occlusal view:
- roughly ___ in outline with a broad base ____
- _____ cusp is the largest, longest and sharpest
- _____ cusp is the smallest and may be absent
- triangular; bucally
- ML cusp
- DL cusp
68
Primary maxillary 1st molar from and occlusal view:
- List the anatomical features from this view: (5)
1. Central fossa
2. mesial & distal triangular fossa
3. Central, buccal and distal developmental grooves
4. Mesial & central pits
5. Oblique ridge
69
What does the oblique ridge connect on the primary maxillary 1st molar?
The oblique ridge connects the ML and DB cusps
70
The primary maxillary 2nd molar:
- resembles ____.
- ____ in outline
- Name the cusps present
- permanent maxillary 1st molar
- rhomboidal
- ML, MB, DB, DL & cusp of carabelli
71
The primary maxillary 2nd molar has a ____ ridge
Oblique ridge
72
The primary maxillary second molar has the same fossa and groove present as the:
Permanent maxillary 1st molar
73
What roots are present on the primary maxillary 2nd molar?
MB, DB, L
74
The primary maxillary 2nd molar: in comparison with the permanent maxillary 1st:
- ____ very close to CEJ (short root trunk)
- Cervix is much _____ compared to the MD diameter at the contact points
- Trifurcation
- much narrower MD
75
The primary maxillary 2nd molars may be clinically confused with:
Permanent maxillary 2nd molar (deciduous max 2nd molar is smaller)
76
The primary mandibular 1st molar:
- ___ cusps are presents; name them
- _____ roots are present; name them
- 4 cusps (MB, ML, DB, DL)
- 2 roots (mesial and distal)
77
The roots of the primary mandibular 1st molar are: (2)
1. Roots are slender and widely splayed
2. Short root trunk
78
The primary mandibular 1st molar resembles what tooth?
It does not resemble any other tooth primary or permanent
79
The primary mandibular 1st molar: buccal view:
- The crown height on mesial is ____ that of distal
- The CEJ dips _____ on the ____
- _____ is flat or straight
- The distal is markedly ___
- twice
- apically on mesial
- mesial contour
- convex
80
The primary mandibular 1st molar: buccal view
- 2 distinct _____, no ____
- Extremely prominent ____ convexity
-Buccal cusps, no developmental groove
- MB convexity
81
The primary mandibular 1st molar: buccal view:
What causes the extremely prominent MB convexity?
1. Prominent MB line angle
2. Prominent MB cervical ridge
82
The primary mandibular 1st molar: lingual view
- What cusps are present?
- The ML cusp is ____
- the ML cusp is in line with ____
- the mesial marginal ridge is well developed and looks like ____.
- ML and DL
- centered in the tooth
- mesial root
- almost like another cusp
83
The primary mandibular 1st molar: mesial and distal views:
- Extreme ___ buccally on the ___ cusp
Convexity bucally on the MB cusp
84
The primary mandibular 1st molar: mesial and distal views
- Describe the buccal surface:
- flattened
85
The primary mandibular 1st molar: mesial and distal views:
Describe the mesial root
Describe the distal root
Mesial root: rectangular appearance
Distal root: tapers at the apex
86
From an occlusal view, the primary mandibular 1st molar is ___ in outline
Rhomboidal
87
From and occlusal view, the primary mandibular 1st molar:
- how many cusps are present? Name them
4 cusps- ML, MB, DL ,DB
88
From and occlusal view, the primary mandibular 1st molar:
Which cusps is largest and what is the location of it?
ML cusp is largest and centered in the lingual aspect
89
From and occlusal view, the primary mandibular 1st molar:
The mesial and distal triangular fossae are joined by:
Central developmental groove
90
From and occlusal view, the primary mandibular 1st molar:
The triangular ridges of the MB and ML cusps form:
Transverse ridge
91
The primary mandibular first molar from an occlusal view- what development grooves are present? What pits are present?
Lingual and buccal developmental grooves; mesial pit and central pit
92
The primary mandibular 2nd molar:
-closely resembles what tooth?
- How many cusps are present?
- What are the cusps present?
-Which cusps are more equal in size?
- permanent mandibular 1st molar
- 5 cusps
- 3 buccal, and 2 lingual
- buccal cusps
93
The distal cusp of the primary mandibular 2nd molar is ____ compared to the permanent mandibular 1st molar:
Relatively larger
94
On the primary mandibular 2nd molar the 2 lingual cusps are:
Equal in size
95
In the primary mandibular 2nd molar, the roots present are:
Mesial and distal roots (2)
96
In the primary mandibular 2nd molar, in comparison with the permanent mandibular 1st molar:
- The birfurcation of the root is:
- The roots are ____
- the ____ cusps are more equal in size
- A cervical ____ is present
- close to CEJ
- Roots flared
- 3 buccal cusps
- cervical constriction
97
A space that exists mesial to the primary maxillary canine and distal to the primary mandibular canine in some deciduous dentitions:
Primate space
98
The primate space is a spaces that exists _____ to the primary _____, and ____ to the primary ____ in some deciduous dentitions
Mesial to the primary maxillary canine & distal to the primary mandibular canine
99
The combined MD widths of permanent premolars and the permanent canine is less than on the combine mesiodistal widths of primary molars and primary canine. This surplus space is called:
Leeway space
100
The leeway space occurs with what teeth in the primary dentition for what teeth in the permanent dentition?
Primary canines and primary molars
Permanent premolars and permanent canine
101
Label what these arrows are pointing to:
Top: cervical ridge
Bottom: cervical constriction
102
What tooth is in this image?
Primary maxillary central incisor
103
This incisal view shows:
Primary maxillary central incisor
104
This image shows what tooth?
Primary maxillary lateral incisor
105
This image shows
Primary maxillary canine
106
This image shows:
Mandibular central incisor
107
This image shows:
Primary Mandibular lateral incisor
108
This image shows:
Mandibular canine
109
What tooth what view?
Primary maxillary 1st molar; buccal view
110
What tooth what view?
Primary maxillary 1st molar; lingual view
111
What tooth what view?
Primary maxillary 1st molar; occlusal view
112
What tooth what view?
Primary maxillary 1st molar mesial view
113
What tooth what view?
Primary maxillary 1st molar- distal
114
What tooth what view?
Primary maxillary 1st molar; mesial view
115
What tooth? What view? Which side is mesial?
Primary maxillary 1st molar, occlusal view, A= mesial
116
Name the labeled anatomy:
Left triangle: mesial triangular fossa
Right triangle: distal triangular fossa
Light green: central developmental groove
Scrub green: distal developmental groove
Blue line: buccal developmental groove
Left pit: mesial pit
Center pit: central pit
117
What tooth what view?
Primary maxillary 2nd molar; buccal view
118
What tooth what view?
Primary maxillary 2nd molar: lingual view
119
What tooth what view?
Primary maxillary 2nd molar; occlusal view
120
What tooth what view?
Primary mandibular 1st molar; buccal view
121
What tooth what view?
Primary Mandibular 1st molar; lingual view
122
What tooth what view?
Primary mandibular 1st molar- mesial view
123
What tooth what view?
Primary mandibular 1st molar: distal view
124
What tooth what view?
Primary mandibular 1st molar occlusal view
125
List the cusps and anatomy of the tooth; what tooth is this?
Primary mandibular 1st molar,
light green line: transverse ridge
Left blue triangle: mesial triangular fossa
Right blue triangle: distal triangular fossa
Green triangles : MB and ML triangular ridges
Left: mesial
Right: distal
Bottom: lingual?
Top: distal?
126
What tooth what view?
Primary mandibular 2nd molar: buccal view
127
What tooth what view?
Primary mandibular 2nd molar; lingual view
128
What tooth what view?
Primary mandibular 2nd molar; occlusal view
