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Morph. > Maxillary 1st Molars (Ye's Version) > Flashcards

Maxillary 1st Molars (Ye's Version) Flashcards

1
Q

From the buccal view, the crown outline of the maxillary 1st molar is roughly shaped:

A

Trapezoidal

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2
Q

From the buccal view, how many cusps are visible from the maxillary 1st molar?

A

4 major cusps

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3
Q

From the buccal view, the distal profile of the crown of maxillary 1st molar is?

A

Convex

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4
Q

From the buccal view, the mesial profile of the maxillary 1st molar is?

A

Convex and Flat

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5
Q

From the buccal view of the maxillary 1st molar, which cusp is larger?

A

MB

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6
Q

From the buccal view of the maxillary 1st molar, which cusp is smaller?

A

DB

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7
Q

From the buccal view of the maxillary 1st molar, which cusp is MORE pointed?

A

DB

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8
Q

The MB and DB cusps are separated by _________?

A

Buccal Developmental Groove

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9
Q

The mesial and distal contacts of the maxillary 1st molar (mesial distal HOC) are located in the ___________?

A

Middle 1/3

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10
Q

There is often a concavity present at the _______ area on the _______ surface of the _____ cusp

A

Cervical; distal; DB cusp

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11
Q

What are the issues with the concavity present on the cervical area on the distal surface of the DB cusp on maxillary 1st molars?

A

Can complicate restorations; difficult to remove calculus

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12
Q

From the buccal view of the maxillary 1st molar, how many roots are visible?

A

3 roots visible

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13
Q

From the buccal view of the maxillary 1st molar, which angle are the axes inclined?

A

Distally

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14
Q

What are the 3 specific roots from the BUCCAL view on maxillary 1st molars?

A
  1. MB
  2. DB
  3. Lingual/palatal
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15
Q

The MB root from the buccal view of the maxillary 1st molar is (straight/distal) then curves _______?

A

Straight; then distally

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16
Q

Where is the apex of the MB root from the buccal view of the maxillary 1st molar?

A

In line with MB cusp tip

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17
Q

The DB root from the buccal view of the maxillary 1st molar is (straight/distal) then curves _______?

A

Distal; then mesial

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18
Q

The lingual/palatal root on the buccal view of the maxillary 1st molar is the (shortest/longest) root?

A

Longest

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19
Q

The DB root on the buccal view of the maxillary 1st molar is the (shortest/longest) root?

A

Shortest

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20
Q

Where is the apex of the lingual/palatal root from the buccal view of the maxillary 1st molar?

A

In line with the buccal groove

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21
Q

The root trunk length from the buccal view of maxillary 1st molars?

A

1/3 length of root

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22
Q

What is the point of bifurcation is ___mm apical to the CEJ

A

4mm

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23
Q

Roots on the maxillary 1st molar are ______ as long as the crown

A

Twice

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24
Q

Are the roots on the maxillary 1st molar splayed or not?

A

Yes

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25
Q

The lingual, MB, and DB roots are splayed ________ than the crown width

A

Wider (Lingual/Palatal: 13mm > MB: 12mm > DB: 12mm)

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26
Q

How many canals on maxillary 1st molar

A

MB: 2 canals in 90-95% of cases
DB: 1 canal
Lingual: 1 canal

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27
Q

From the lingual, how many visible major cusps can you see on a Maxillary 1st Molar? Which cusps are they?

A

Two visible major cusps (ML, DL)

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28
Q

ML and DL separated by the _______ _______ on the maxillary 1st molar?

A

Lingual groove

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29
Q

Which cusp is spheroidal on the maxillary 1st molar when viewed from the Lingual?

A

DL cusp

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30
Q

The DL cusp on a maxillary 1st molar is what shape?

A

Spheroidal

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31
Q

The ML cusp = __/__ mesiodistal width of the tooth from the lingual view on the maxillary 1st molar?

A

ML is the most broad and the longest cusp on the maxillary 1st molar?

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32
Q

What is the 5th cusp on the maxillary 1st molar called?

A

Cusp of Carabelli

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33
Q

From the lingual, how many roots are visible?

34
Q

Which root is the longest on the maxillary 1st molar?

A

Lingual/palatal root

35
Q

The lingual root is _____ ______ with the lingual groove (or buccal groove, or midpoint of MD dimension)?

36
Q

Where is the depression located on the lingual aspect of a maxillary 1st molar?

A

Lingual aspect (from the terminus of the lingual groove extending to the middle 1/3 of the root).

37
Q

From the mesial, what is the outline form of the maxillary 1st molar?

A

Trapezoidal

38
Q

From the mesial the tooth converges occlusally: maximum B-L width at the ______

39
Q

Only the ____ and ____ cusps are visible form the the mesial view of the maxillary 1st molar?

A

MB, and ML (and 5th minor cusp - cusp of carabelli)

40
Q

The buccal HOC on the maxillary 1st molar (mesial view):

A

Cervical 1/3

41
Q

The lingual HOC on the maxillary 1st molar (mesial view)

A

Middle 1/3

42
Q

The mesial contact area on maxillary 1st molar (mesial view) is located in the ________? and is offset ______?

A

Middle 1/3; offset buccally

43
Q

From the mesial, which roots are visible on maxillary 1st molars?

A

MB and Lingual/palatal

44
Q

The MB root is _______ BL and hides the ______ root (mesial view)

45
Q

Lingual root on maxillary 1st molar: ______ BL (banana shaped)

46
Q

What % of the times does the lingual root curve? What direction?

A

50%; buccally

47
Q

What is the level of bifurcation ( __mm apical to CEJ) mesial view of maxillary 1st molar?

48
Q

Maxillary 1st molar: Distal view

Crown constricts towards the _______, therefore the _______ aspect is visible from the distal.

A

distal; buccal

49
Q

Maxillary 1st molar: Distal view

How many major cusps are visible?

A

4 major cusps

50
Q

Maxillary 1st molar: Distal view

How many roots are visible?

51
Q

Maxillary 1st molar: Distal view

Bifurcation is about ___mm apical from the CEJ

52
Q

Maxillary 1st molar: Distal view

Distal contact area is in the _______, and offset to the ______

A

Middle 1/3; offset to the buccal

53
Q

Maxillary 1st molar: Distal view

There is a ____ concavity around the ______ area

A

DB concavity; cervical area

54
Q

Maxillary 1st molar: Occlusal view

What is the outline form?
What angles are acute?
What angles are obtuse?

A

Rhomboidal
Acute = MB & DL
Obtuse = ML & DB

55
Q

Maxillary 1st molar: Occlusal view

Crown wider _____ than _____

A

Wider BL than MD

56
Q

Maxillary 1st molar: Occlusal view

The mesial aspect (greater or less) than distal aspect?

57
Q

The maxillary 1st molar is the ONLY tooth which (broadens/shortens) toward the lingual?

58
Q

The MD width is (greater/less than) the L side than it is on the buccal?

59
Q

Maxillary 1st molar: Occlusal view

Order the cusps: largest to smallest

A

(largest)

ML
MB
DB
DL
Fifth cusp (cusp of carabelli)

(smallest)

60
Q

Maxillary 1st molar: Occlusal view

Which cusps form the primary molar triangle (trigon)?

A

ML, MB, and DB cusps

61
Q

Maxillary 1st molar: Occlusal view

The oblique ridge is formed by the ______ cusp ridge of the ____ cusp and the triangular ride of the ____ cusp

A

Distal; ML; DB

62
Q

Maxillary 1st molar: Occlusal view

How many major fossae are located here?

A

2 major fossae

63
Q

Maxillary 1st molar: Occlusal view

What are the 2 fossae located here?

A

Central and Distal fossa

64
Q

Maxillary 1st molar: Occlusal view

The central fossae lies where?

A

In the center of the trigon, mesial to the oblique ridge, roughly triangular

65
Q

Maxillary 1st molar: Occlusal view

The distal fossae lies where?

A

Distal to the oblique ridge, roughly linear

66
Q

Maxillary 1st molar: Occlusal view

How many minor fossae are there?

A

2 minor fossae:
- mesial triangular fossa
- distal triangular fossa

67
Q

Maxillary 1st molar: Occlusal view

How many pits are there? What are their names?

A

2 pits:
- central pit
- distal pit

68
Q

Maxillary 1st molar: Occlusal view

Where is the central pit located?

A

Junction of central developmental groove, buccal groove, transverse groove of oblique ridge

69
Q

Maxillary 1st molar: Occlusal view

Where is the distal pit located?

A

Junction of distal oblique groove, lingual groove

70
Q

The maxillary 1st molar has a __________. Meaning the root divides into ___ roots?

A

Trifucation; 3 roots

71
Q

Maxillary 1st molar: Level of Furcations:

Mesial: __mm apical to CEJ
Buccal: __mm apical to CEJ
Distal: __mm apical to CEJ

A

Mesial: 3mm
Buccal: 4mm
Distal: 5mm

72
Q

Maxillary 1st molar: Proximal contacts

Mesial: _____________ offset to ________
Distal: _____________ offset to ________

A

Mesial: middle 1/3 offset to buccal
Distal: middle 1/3 offset to buccal

73
Q

What tooth & view?

A

Maxillary 1st molar - Buccal view

74
Q

What tooth & view?

A

Maxillary 1st Molar - Lingual view

75
Q

What tooth & view?

A

Maxillary 1st molar - Mesial view

76
Q

What tooth & view?

A

Maxillary 1st molar - Distal view

77
Q

What tooth & view?

A

Maxillary 1st molar - Occlusal view

78
Q

What tooth & view?

A

Maxillary 1st molar - Buccal view

79
Q

What tooth & view?

A

Maxillary 1st molar - Lingual view

80
Q

What tooth & view?

A

Maxillary 1st molar - Mesial view

81
Q

What tooth & view?

A

Maxillary 1st molar - Distal view

82
Q

What tooth & view?

A

Maxillary 1st molar - Occlusal view

Morph. (26 decks)

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