Overview of Dentitions Flashcards
(83 cards)
1
Q
Primary dentition
A
20 teeth total
No premolars
No 3rd molars/wisdom teeth
2
Q
Permanent dentition
A
32 teeth total
3
Q
Mixed dentition
A
- When both primary and permanent teeth are present in the same dentition
- Ages 6-12
- More than 20 teeth
4
Q
UR
A
Maxillary right
Upper right
5
Q
UL
A
Maxillary left
Upper left
6
Q
LR
A
Mandibular right
Lower right
7
Q
LL
A
Mandibular left
Lower left
8
Q
How many teeth does a primary quadrant have?
A
5
9
Q
How many teeth does a permanent quadrant have?
A
8
10
Q
Anterior teeth
A
Canine to canine
11
Q
Posterior teeth
A
Premolar to third molar
12
Q
How many teeth are in a sextant?
A
6
13
Q
DAQT
A
Dentition
Arch
Quadrant
Tooth
14
Q
Enamel
A
White outermost layer of the crown
15
Q
Dentitn
A
Yellow, biggest layer
16
Q
Cementum
A
Outermost layer of the root, not visible
17
Q
Pulp
A
Soft tissue in tooth
Radiolucent
18
Q
Bifurcation
A
A division of the root trunk into two branches
19
Q
Trifurcation
A
A division of root trunk into three branches
20
Q
Furcation
A
Point of division of a multirooted tooth
21
Q
Common traits of all roots
A
- Widest at the CEJ and tapered towards the apex
- More bulk on the facial surface than on the lingual
- Many surfaces of the roots have indentation or root concavities
22
Q
Root axis line/RAL
A
Imaginary line through the center of the tooth root
23
Q
Cervical line or CEJ
A
Separates the anatomic crown from the anatomic root
24
Q
Anatomic crown
A
“Whole” crown of the tooth that is covered by enamel, regardless the tooth is erupted
25
Clinical crown
Is only that part seen in the gingiva, term only applies when tooth is in the mouth and at least partially erupted
26
Anatomic root
Part of tooth covered with cementum
27
Clinical root
Part of the tooth which is not visible in the mouth yet
28
Mesial
Closest to the midline
29
Distal
The surface farthest from the midline
30
Facial
The surfaces closest to the face or outer surfaces of the teeth
31
Anterior facial is called...
Labial surface
32
Posterior facial is called...
Buccal
33
Lingual
Surfaces closest to the tongue, all inner surfaces
34
Lingual of the maxillary is called...
Palatal surface
35
Masticatory
The chewing surface on the most superior surface of the crown
36
Posterior masticatory is called...
Occlusal
37
Anterior masticatory is called...
Incisal surfaces
38
What do the masticatory surfaced have?
- Linear elevations, or ridges
- Named according to location
39
The canines have...
- Cusps
- One major elevation
40
Interproximal space
Area between adjacent tooth surfaces
41
Contact area
- Area where the crowns of adjacent teeth in the same arch physically touch on each proximal surface
42
How many contacts does each tooth have?
2
43
Were are the contacts located?
At the height of contour
44
What four teeth are the exception to the contact rule?
8, 9, 24, and 25
45
Purpose of contact areas?
- Prevents impaction
- Stabilizes arch
- Prevents buildup
- Protection
46
Interproximal bone
Part of bone in-between teeth
47
Contact area general rules
- More cervically located anterior to posterior
- Mesial more incisally or occlusally located except mandibular incisors
- Larger in posterior than anterior
48
Contact point
Relationship between max and mand arch
49
Height of contour
Widest point
50
Height of contour is usually higher on the mesial or distal?
Mesial
51
Proximal height of contour on anterior teeth is located...
Closer to the incisal surfaces
52
Proximal height of contour on posterior teeth is located...
Near the middle third
53
Height of contour on buccal
Anterior and posterior teeth is cervical third
54
Height of contour on lingual
- Anterior teeth is cervical third
- Posterior teeth is middle third
55
Function of height of contour
Natural tooth convexities divert food away from the tissue
56
Insufficient contour
Inadequate protection, too much stimulation
57
Excessive contour
Inadequate stimulation
58
Embrasures
- When two teeth in the same arch come into contact, their curvature next to contact areas form this
- V shape
59
In the posterior, are the embrasures bigger or smaller on the lingual? Why?
- Lingual embrasures are larger than facial
- Contact area is more buccal
60
Do facial embrasures increase or decrease in size when you move from anterior to posterior? Why?
- Increase, bigger in posterior
- Because the contact points are located more cervically
61
Functions of embrasures
- Serve as spillway
- Integral part of self cleansing
- Reduces force of mastication
- Allows stimulation of the gingiva
62
What are the closed spaces in the interproximal spaces
Interdental papilla
63
Interproximal space functions
- Vascular support, nourishment
- Prevents impaction
- Anchorage and support
64
What stimulates the peridontum?
Shape, height of contour, contact areas, contact point, interproximal spaces, embrasures
65
Gum vs periodontum
- Gum is what we see
- Periodontium is the whole thing, including shape, embrasure, etc.
66
Proximal divisions
3 vertical thirds
- Facial
- Middle
- Lingual
67
Root division
Horizontal thirds
- Apex
- Middle
- Cervical
68
Line angle
Describes the junction where two surfaces meets
69
Point angle
Another way to determine a specific area of the crown
70
Succedaneous teeth
Teeth that replace primary dentition
71
What teeth are succedaneous?
- IIncisors: Central/lateral
- Canine
- Premolars (1st and 2nd)
72
Nonsuccedaneous teeth
All molars
73
Are molars succedaneous?
No
74
Are all succedaneous teeth permanent teeth?
Yes
75
Are all permanent teeth succedaneous teeth?
No
76
Are primary teeth succedaneous?
No
77
Premolars are also called...
Bicuspids
78
Role of incisors?
Cut food
79
Role of canines?
Tear food
80
Role of molars?
Chew, crush, and grind food
81
3 system of identifying teeth
- Universal
- Palmer
- International Standard Organization
82
What system uses one digit and one symbol?
Palmar
83
What system is two digit system?
ISO
