Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Oral Anatomy > Basic Terminology, Dentition, Numbering, Morphology of Crowns > Flashcards

Basic Terminology, Dentition, Numbering, Morphology of Crowns Flashcards

1
Q

Dentition

A

Primary-6 mo-2 yr
Permanent- 6yr new teeth erupt, start losing
-at 21 permanent complete

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Arch

A

Maxillary or Mandibular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Quadrant

A

half an arch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Anterior teeth

A

canines and incisors

  • behind lips
  • first 3 from midline in each quadrant
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Midline

A

separates arches into quadrants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Name the 4 classes of teeth

A

Incisors
Canines
Premolars
Molars

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Incisors

A

cut food

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Canines

A

Pierce food

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Premolars

A

piercing and minor grinding of food

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Molars

A

Solely for grinding food, large surface area for smashing food well

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

3 Types of teeth

A

1) Central and lateral (just single canine in each quadrant, no types)
2) 1st and 2nd (premolars)
3) 1st, 2nd, and 3rd (molars)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Primary teeth

A

Deciduous teeth
Only 20 teeth
-NO premolars

1st and second premolars, 3rd molars NOT present

A-T in UNS (NO numbers)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Adult teeth are numbered _ - _ in the Universal Numbering System

A

1-32
Start maxillary right (9oclock) 1st tooth #1 is 3rd Molar

top right clockwise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Name the 4 tissues of the tooth

A

Enamel
Dentin (shaded gray)
Cementum
Pulp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Enamel

A

Strongest tissue in body

  • ameloblasts
  • white but lots translucency
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Dentin

A 
shaded gray
70% Ca hydroxyapetite
-odontoblasts  
-yellow in color 
-right inside enamel, can't be seen unless looking at rad
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Cementum

A

surrounds root of tooth, thin layer, cementoblasts
yellowish in color, has 50-65% Ca hydroxyapet.
same density of bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Pulp

A

inside, only soft tissue on tooth
made of connective tissue with
blood vessels and nerves,
makes tooth vital organ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Cervical area of tooth

A

Neck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Apical foramen

A

apex=tip of root

foramina=openings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Root canal

A

innermost channel of pulp leading to pulp chamber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Pulp chamber

A

below dentin, reaches slightly into anatomical crown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Cementodentinal Junction

A

CDJ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Cementoenamel Junction

A

CEJ

-where crown and root anatomically separate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Dentinoenamel junction

A

can’t see cause inside tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

pulp horns

A

projections, have to stay away

so you dont expose pulp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

enamel covers anatomical ____

cementum covers anatomical ____

A

crown

root

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

anatomical crown never changes
but clinical _____ changes during life for
different reasons

A

clinical root and crown changes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Anatomical crown

A

covered with enamel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Anatomical root

A

covered with cementum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

When do the terms clinical crown and root apply?

A

ONLY when tooth is in mouth and at least partially erupted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Periodontium

A

surrounding tissues of tooth

  • gingiva (free vs attached)
  • cementum
  • periodontal ligament
  • bone (alveolar bone)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

labial or facial

A

anterior teeth surface toward lips

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

buccal or facial

A

posterior teeth

surface toward cheeks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

lingual or palatal

A

maxillary teeth surface toward tongue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

lingual

A

mandibular teeth toward the tongue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

incisal edge or ridge

A

anterior teeth biting surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

occlusal surface

A

posterior teeth biting surface

39
Q

each tooth has __ proximal surfaces

A

2

mesial
distal

40
Q

Mesial

A

proximal surfaces that face the midline of an arch

41
Q

Distal

A

proximal surfaces that face away from the midline of an arch

42
Q

divisions of crown from facial/lingual view

A

mesial, middle, distal

-occlusal/incisal (top), middle, cervical

43
Q

divisions of crown from proximal views

A

facial, middle, lingual

occlusal/incisal, middle, cervical

44
Q

List of surfaces for naming LAs, PAs

A 
Mesial=1
Distal=2
Facial/Labial/Buccal=3
Lingual=4
Occlusal or Incisal=5
Cervical and Apical=6
45
Q

surface junctions

A

two surfaces that join (line angle)

ex: distolabial, mesiobuccal

lose -al and +o

46
Q

Dimension

A

the distance between two
opposite surfaces, such as:
Mesiodistal dimension

47
Q

Root-to-Crown Ratio

A

Small ratio (smallest: 1.16-maxillary central incisor)
denotes nearly equal
crown and root length

Larger ratio (1.56-right maxillary canine)
denotes a relatively
larger root compared to
the crown

48
Q

optimum root/crown ratio

A

2/3

49
Q

minimum root/crown ratio

A

1/1

50
Q

What is the longest crown?

A

mandibular canine or

maxillary central incisor

51
Q

Longest tooth

A

maxillary canine

52
Q

Widest crown

A

mandibular first molar

53
Q

Narrowest crown

A

mandibular central incisor

54
Q

Cusps

A

rounded
-pyramid shaped with
four ridges

  • Mesial cusp ridge
  • Distal cusp ridge
  • Facial cusp ridge
  • Triangular ridge
55
Q

Ridges

A

linear/linear bulges

56
Q

Triangular ridge

A

from cusp tip to middle of tooth

present ONLY on POSTERIOR teeth

57
Q

1-5 cusps

A

canines and posterior teeth

58
Q

cusp ridges

A

cusp slopes or cusp arms

mesial and distal

59
Q

Transverse (Oblique) Ridge

A

Two Triangular ridges joined together (triangular of DB and DL meet/line up from buccal to lingual)

60
Q

Buccal (labial) cusp ridge

A

very subtle

61
Q

Buccal Cervical Ridge

A

subtle

-near CEJ mesially

62
Q

Mamelons

A

Three bumps form on adult
Incisors from three labial lobes; Usually
wear away

63
Q

Mamelons

A

Three bumps form on adult
Incisors from three labial lobes; Usually
wear away

64
Q

Perikymata

A

Very small horizontal
wave-like ripples of Enamel on newly erupted
adult teeth

65
Q

Depressions in teeth

A

fossae and grooves

66
Q

Grooves

A

linear depressions

Major vs. Minor

67
Q

Major Grooves

A

(developmental)
– Central groove
– Fossa grooves

68
Q

Minor Grooves

A

(supplemental)
– Marginal ridge grooves
– Extra grooves

69
Q

Central grooves

A

located in the
buccolingual center of
the tooth and run
mesiodistally

70
Q

Fossa grooves

A

named for the surface
or line angle they “aim”
toward

71
Q

Fossae

A

Shallow bowl-like depressions

Fossae on occlusal surfaces are located in
the intersection of the grooves

72
Q

Pit and fissure

A

Decay starts in grooves and
spreads out more quickly once into Dentin
(softer than Enamel)

73
Q

Pits

A

-often found within fossae (depressions)

Incisors (especially
maxillary) have one
broad, shallow fossa
(sometimes with a
lingual pit)
74
Q

Two-cusped premolars have _ fossae

A

TWO

Mesial
Distal

75
Q

Three-cusped premolars and most molars have ____

fossae

A

THREE

– Mesial
– Central
– Distal

76
Q

furcal area

A

area between roots if split

77
Q

CEJ on proximal curves toward

A

occlusal/incisal

78
Q

CEJ mesial curves ___ than distal

A

MORE than

79
Q

CEJ on facial (or lingual)

curves toward ____

A

root apex

80
Q

CEJ curvature _______
from anterior to
posterior crowns

A

diminish

81
Q

Root Axis Line

A

An imaginary line that splits the root in half (Mesiodistally or Faciolingually)

82
Q

Height of Contour

A

Crest of Curvature)

83
Q

Contact Areas

A

(or Proximal Heights of

Contour): Protect Gingiva; Prevent Food Impaction

84
Q

Embrasure Spaces

A

are ONLY present
when two adjacent teeth touch

• Four embrasures
– Facial
– Lingual (larger than
facial)
– Occlusal or incisal (often
quite small)
– Cervical = interproximal
space (filled with
gingiva)
85
Q

Maxillary teeth from lateral view

A

Anteriors are mesially inclined

Posteriors are not

86
Q

Mandibular teeth from lateral view

A

all mesially inclined

87
Q

Tilt from frontal view

A

Maxillary teeth tilt facially

Mandibular teeth tilt lingually

88
Q

Anteroposterior Curve (of Spee)

A

Maxillary curve is
convex

Mandibular curve is
concave

89
Q

Mediolateral Curve (of Wilson)

A

-Maxillary curve is
convex
-Mandibular curve is
concave

90
Q

Ideal Occlusion

A

Occlusion is the contact of the occlusal and incisal surfaces ofbmaxillary and mandibular teeth

91
Q

Ideal Class I Occlusion Relationship (Angle’s Classes)

A 
Class I jaw relationship
is when the
mesiobuccal cusp of
maxillary first molar fits
into mesiobuccal
groove of mandibular
first molar (that is, the
most mesial of the two
buccal grooves)

Maximal intercuspal
position

Maxillary teeth are
FACIAL to mandibular

Buccal cusps of maxillary
teeth are facial to
mandibular
• Buccal cusps of mandibular
fit into maxillary fossae
• Lingual cusps of maxillary fit into mandibular fossa
• Lingual cusps of mandibular
are lingual to maxillary
92
Q

Tooth Development From Lobes

A

Anterior teeth form
from four lobes (three
facial and one lingual)

Premolars form from
three facial lobes and
one lobe per lingual
cusp

Molars form from one
lobe per major cusps

93
Q

functional/working cusp

A

cusp doing majority of the work

maxillary: lingual
mandibular: buccal

Oral Anatomy (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions