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Tooth Morphology > Quiz 3 - Molars and Primary Dentition > Flashcards

Quiz 3 - Molars and Primary Dentition Flashcards

1
Q

When do 1st molars erupt?

A

Around 6 years

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2
Q

When do 2nd molars erupt?

A

Around 12 years

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3
Q

When do 3rd molars erupt?

A

17-22 years

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4
Q

What are the functions of molars?

A

-Mastication
-Vertical dimension of face
-Maintenance of arch
-Supports cheeks

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5
Q

How many lobes do maxillary molars have?

A

3-5

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6
Q

How many lobes do mandibular molars have?

A

4-5

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7
Q

What is the facial height of contour for molars?

A

Cervical third

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8
Q

What is the lingual height of contour for molars?

A

Middle third

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9
Q

Where is the mesial contact located on molars?

A

Near junction of middle/occlusal thirds

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10
Q

Where is the distal contact located at on molars?

A

Near middle of tooth

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11
Q

What molars width make up 51% of the quadrant?

A

Mandibular molars

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12
Q

What molars width make up 44% of the quadrant?

A

Maxillary molars

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13
Q

What is the widest tooth buccolingually?

A

Maxillary first molars

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14
Q

What is the name of the small 5th cusp on the maxillary 1st molars?

A

Cusp of carabelli

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15
Q

How many fossas do maxillary 1st molars have?

A

4

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16
Q

How many roots do maxillary 1st molars have?

A

3

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17
Q

How many root canals do maxillary 1st molars have?

A

4

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18
Q

What root on maxillary 1st and 2nd molars has two root canals?

A

Mesiobuccal root

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19
Q

How many pulp horns do maxillary 1st molars have?

A

4

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20
Q

How many cusps do maxillary 2nd molars have?

A

4

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21
Q

How many roots do maxillary 2nd molars have?

A

3

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22
Q

How many root canals do maxillary 2nd molars have?

A

4

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23
Q

What is a tubercle?

A

Projection of enamel

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24
Q

What molars have the largest mesiodistal dimension?

A

Mandibular 1st molars

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25
Q

How many cusps do mandibular 1st molars have?

A

5

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26
Q

How many buccal grooves do mandibular 1st molars have?

A

2

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27
Q

What teeth have a lingual tilt of crown?

A

Mandibular 1st & 2nd molars

28
Q

How many fossas do mandibular 1st molars have?

A

3

29
Q

How many transverse ridges do mandibular 1st & 2nd molars have?

A

2

30
Q

What molars don’t have oblique ridges?

A

Mandibular 1st molars

31
Q

How many roots do mandibular first molars have?

A

2

32
Q

How many root canals do mandibular 1st molars have?

A

3
- 2 in mesial root

33
Q

How many pulp horns do mandibular 1st molars have?

A

5

34
Q

How many cusps do mandibular 2nd molars have?

A

4

35
Q

What molars have a zigzag looking occlusal surface?

A

Mandibular 1st molars

36
Q

What molars have a cross looking occlusal surface?

A

Mandibular 2nd molars

37
Q

How many roots do mandibular 2nd molars have?

A

2

38
Q

How many root canals do mandibular 2nd molars have?

A

3
- 2 in mesial root

39
Q

How many pulp horns do mandibular 2nd molars have?

A

4

40
Q

Why do 3rd molars have a bad reputation?

A

-Don’t serve any function
-Soft enamel
-Easily decay
-Crowding of anterior teeth

41
Q

What makes 3rd molars prone to develop decay?

A

Wrinkled fissured occlusal surface

42
Q

Inflammation of the tissue around the teeth
-Can occur more often when operculum becomes irritated

A

Pericoronitis

43
Q

What weeks prenatally have all primary teeth started to calcify?

A

18-20

44
Q

When do primary central incisors erupt by?

A

6-10 months

45
Q

Between what ages have all primary teeth erupted?

A

2-3 years

46
Q

What is the order of primary teeth eruption?

A

1st: Mand. central incisors
2nd: Other incisors - Max. laterals last
3rd: First molars
4th: Canines
5th: Second molars

47
Q

What are the functions of primary teeth?

A

-Chewing
-Support teeth and lips
- Speech
-Maintaining space

48
Q

Baby teeth decayed from bathing teeth in sugar

A

Baby bottle syndrome

49
Q

Tooth erupted with a deformation spot on it

A

Turner’s spots

50
Q

What are some traits of primary teeth?

A

-Smaller
-Crowns appear squeezed at CEJ
-Longer roots than crowns
-White
-Fewer anomolies
-Pulp is closer to occlusal plane
-Decay faster

51
Q

What primary teeth are wider mesiodistally than they are long?

A

Maxillary centrals

52
Q

What primary teeth are longer from their incisal edge to the CEJ than they are wide?

A

Maxillary laterals

53
Q

What primary teeth have a prominent cingulum?

A

Mandibular centrals

54
Q

What primary teeth’s incisal edge slopes distally?

A

Mandibular laterals

55
Q

What primary teeth’s cingulum is more developed with a deeper lingual fossa?

A

Mandibular laterals

56
Q

What primary teeth have a sharper cusp when first erupted and their root is twice as long as the crown?

A

Maxillary canines

57
Q

What primary teeth have a smoother lingual surface and their root is not as long as the maxillaries?

A

Mandibular canines

58
Q

What do the primary second molars resemble?

A

permanent first molars

59
Q

What primary teeth have a narrower buccolingual occlusal table?

A

Primary molars

60
Q

What cusp is absent on primary maxillary first molars?

A

Disto-lingual

61
Q

What root is the longest on primary maxillary first molars?

A

Lingual root

62
Q

What teeth have oblique ridges?

A

-Primary maxillary 2nd molar
-Permanent maxillary 1st molar

63
Q

What primary teeth do NOT resemble any other teeth in both dentitions?

A

Primary mand. 1st molars

64
Q

What teeth do primary mand. 2nd molars closely resemble?

A

Permanent mand. 1st molars

65
Q

What primary tooth is the 6th from the midline?

A

Primary 1st molars

Tooth Morphology (6 decks)

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