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PTD Jessica > Chapter 1 J: Dental Anatomy > Flashcards

Chapter 1 J: Dental Anatomy Flashcards

1
Q

How many teeth are present in primary dentition?

A

20

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2
Q

How many teeth are present in permanent dentition?

A

32

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3
Q

Mixed dentition is between the ages of ?

A

6-12

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4
Q

Palatal refers to ?

A

Maxillary teeth

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5
Q

Lingual refers to?

A

Mandibular teeth

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6
Q

Proximal surfaces are?

A

Mesial and distal

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7
Q

A cusp is defined as?

A

An elevation on the crown portion

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8
Q

A tubercle is defined as?

A

A smaller elevation on the crown portion caused by extra formation of enamel

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9
Q

A cingulum is defined as?

A

The lingual lobe of an anterior tooth

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10
Q

What teeth are located on either side of the median line

A

Upper and lower central incisors

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11
Q

The most common agenesia is?

A

Upper lateral Incisors

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12
Q

The most common supernumerary?

A

Mesiodens

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13
Q

General shape of incisors (vestibular surface)?

A

Convex

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14
Q

General shape of incisors (lingual surface)?

A

Convex at the cingulum then turns to concave on the way to the incisal edge

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15
Q

Function of incisors?

A
  • aesthetics (lip support)
  • masticatory (incisal edge is used to cut food)
  • phonetics (sound)

MAP

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16
Q

The tooth is divided into:

A

Crown, cervix, root, and apex of the root

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17
Q

Contacts of the incisors?

A

Lower incisors make contact to the lingual surfaces of the UCI and the mesial portion of the ULI

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18
Q

Which tooth is the dominant tooth of the upper arch and condiitons the whole facial aesthetics?
And the widest mesiodistally of any anterior tooth?

A

Upper central incisors

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19
Q

Shape and size of upper central incisors:

A
  • widest mesiodistally of any anterior teeth
  • trapezoid or rectangular shape
  • Uniradicular
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20
Q

The only situation where the mesial surface of the same tooth contact? And where does this contact happen?

A

Central incisors
On incisal and middle third

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21
Q

8mm is the ?

A

Mesiodistal distance of UCI

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22
Q

10mm is the?

A

Cervico incisal distance of UCI

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23
Q

In regards to the UCI, which incisal angle is 90 degrees and which one is rounded?

A

Mesial and distal respectively

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24
Q

The vestibular aspect of the UCI is ?

A

Convex and the maximum convexity occurs at the cervical third.

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25
Q

Perikymata are

A

Horizontal lines on the vestibular surface of UCI

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26
Q

Why does the lingual surface of the UCI have less surface ?

A

MD convergence

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27
Q

Is the cingulum symmetrical in UCI?

A

No, it’s slightly distalized

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28
Q

Which marginal ridge is thicker and shorter in UCI?

A

Distal marginal ridge

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29
Q

Is the lingual fossa in the UCI convex or concave?

A

Concave

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30
Q

Which aspect is more convex in UCI (mesial or distal)?

A

Distal

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31
Q

The length of the root is ___ times the crown in the UCI?

A

1.25-1.5

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32
Q

Transversal cuts to the root in UCI results in?

A

A square near the cervix and a triangle near the apex

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33
Q

Roots are usually curved to ?

A

Distal

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34
Q

How many pulp chambers do the UCIs have and is there a delimitation between the chamber and the canal?

A

1, and no

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35
Q

ULI compared to CI:

A

Smaller, more symmetric, rounded incisal edge, smaller and deeper fossa, centred cingulum, thinner root.

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36
Q

Bigger: LCI or ULI?

A

ULI

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37
Q

Which tooth is the smallest and most symmetric?

A

LCI

38
Q

The incisal edge of the LCI is:

A

Horizontal, right proximal angles

39
Q

How many root canals do LCI have and is there a delimitation between the chamber and canal?

A

1 or 2 root canals (if 2: vestibular and lingual)
No delimitation

40
Q

LLI compared to LCI?

A
  • less symmetric
  • bigger
  • shorter root
41
Q

Which tooth is the longest tooth and the hardest to extract?

A

Canines

42
Q

Which tooth is located at the greatest angulation point of the dental arch?

A

Canines

43
Q

Which tooth is the limit between the anterior and posterior sector?

A

Canines

44
Q

Canines guide the __ movement?

A

Lateral

45
Q

Class I canines:

A

Between the lower canines and the 1st premolars

46
Q

Is the incisal edge of the upper canines symmetrical?

A

No, the distal cusp ridge is longer than the MCR

47
Q

Is the cingulum centred in upper canine?

A

Yes, produces 2 fossae

48
Q

Which lobe is developed and prominent in upper canines?

A

Middle lobe

49
Q

Crown:root length of upper canines?

A

1:2

50
Q

How many pulp chambers do upper canines have and is there a delimitation between the chamber and the canal?

A

1 and no

51
Q

Lower canines in comparison to upper canines?

A
  • cingulum is off centred and smoother ridges
  • cusp tip towards mesial more than in upper canines
  • shorter and straighter root
  • 1 or 2 root canals
  • can have 2 roots
52
Q

What is the most common mandibular agenesia?

A

2nd premolar

53
Q

What teeth substitute the primary molars and are not present in primary dentition?

A

Premolars

54
Q

What cusp is prominent in premolars?

A

Vestibular

55
Q

Do premolars have longer or shorter crowns and roots?

A

Shorter

56
Q

Which teeth group maintain vertical dimension, prevent the cheeks from collapsing, and helps the canines in lateral movement (group function)?

A

Premolars

57
Q

Which upper premolar is wider?

A

1st PM

58
Q

Which tooth does this statement refer to? More rounded cusps, wider contact surfaces, and function more similar to molars (crushing)

A

Upper second premolar

59
Q

How many cusps do upper premolars have?

A

1-3 cusps possible

60
Q

How many pulp horns and canals do upper premolars have?

A

2 pulp horns corresponding to each cusp and 2 canals even if single root

61
Q

Which cusp is 1mm higher in the upper first premolars?

A

Vestibular

62
Q

How many roots do the upper second premolars have?

A

1

63
Q

These root characteristics refer to which tooth?
- 1 root, flat MD
- 3/4mm shorter than canine
- 1 root canal

A

Lower first premolar

64
Q

Which of the premolars could have two roots?

A

Upper first premolar

65
Q

Lower second premolar: how many cusps?

A

Can have 3 and if 3, the distolingual cusp is the smallest

66
Q

Molar general facts:

A
  • important role in VD (facial aesthetics)
  • maximum anchorage to bone: 2-3 roots
67
Q

What tooth is the largest tooth in the upper arch?

A

First molar

68
Q

How many cusps do upper first molars have?

A
  • 4 + 1 undeveloped one (Carabelli’s cusp)
  • 2 V + 2 P + carabelli
69
Q

How many roots do the upper first molars have?

A

3
2 V + 1 P

70
Q

Do the upper second molars have carabelli’s cusp?

A

No

71
Q

How many cusps do the lower first molars have? and which ones are the active cusps?

A

5
2 V+ 2 L+ 1D
VIPS: VESTIBULAR INFERIOR, PALATAL SUPERIOR

72
Q

Which cusp is higher in lower first molars?

A

Lingual cusps—>inactive are higher

73
Q

How many roots and canals do lower first molars have?

A
  • 2 roots (M&D) or can be fused into one, infrequently can be 3
  • M root flat with 2 canals, MV&ML
  • D root thinner with 1 or 2 canals
74
Q

Which tooth is harder to extract and why?
Lower first molar or upper molars?

A

Lower first molars because of the properties of the mandible

75
Q

How many cusps do the lower second molars have?

A

4

76
Q

How many roots do third molars have?

A

Often fused into 1

77
Q

What can be defined as… a small elevation on some portion of the crown roduced by an extra
formation of enamel?
A: cusp
B: tubercle
C: ridge
D: cingulum

A

B

78
Q

A cusp can be described as an elevation or mound on the crown portion? T or F

A

True

79
Q

What can be described as a lobe found on the lingual aspect of anterior teeth?
A: cingulum
B: cusp
C: ridge
D: fossae

A

A

80
Q

The most common supernumerary is known as mesiodens? T or F

A

T

81
Q

The second upper premolar is the most common missing tooth? T or F

A

?

82
Q

What is the ideal ratio (length/width) on an upper central incisor?
A: 10/8
B: 10/9
C: 11/7
D: 11/8

A

A

83
Q

What are Perikymatas?
A: vertical lines of development
B: horizontal lines of development
C: kymatic cells of enamel
D: kymatic cells of dentin

A

B

84
Q

The root length on a central incisors is normally 1.25/1.5 times its crown? T or F

A

T

85
Q

Canines have two marginal ridges and two cusp ridges? T or F

A

T

86
Q

Which tooth is the smallest mesiodistally?
A: upper lateral incisor
B: upper central incisor
C: lower central incisor
D: lower lateral incisor

A

?

87
Q

Which group of teeth are not present in primary dentition?
A: all are present
B: none are present
C: laterals
D: premolars

A

D

88
Q

How many cusps does a lower first molar have?
A: 3
B: 4
C: 5
D: 6

A

5

89
Q

How many roots does a lower first molar have?
A: 2
B: 3
C: 4
D: 5

A

A

90
Q

What are the active cusps?
A: upper lingual
B: upper vestibular
C: upper lingual and lower buccal
D: upper vestibular and lower buccal

A

C

91
Q

How many roots do upper first premolars have?

A

2

PTD Jessica (7 decks)

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