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

Maxillary 1st Molars (Ye's Version) Flashcards

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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
The lingual, MB, and DB roots are splayed ________ than the crown width
Wider (Lingual/Palatal: 13mm > MB: 12mm > DB: 12mm)
26
How many canals on maxillary 1st molar
MB: 2 canals in 90-95% of cases DB: 1 canal Lingual: 1 canal
27
From the lingual, how many visible major cusps can you see on a Maxillary 1st Molar? Which cusps are they?
Two visible major cusps (ML, DL)
28
ML and DL separated by the _______ _______ on the maxillary 1st molar?
Lingual groove
29
Which cusp is spheroidal on the maxillary 1st molar when viewed from the Lingual?
DL cusp
30
The DL cusp on a maxillary 1st molar is what shape?
Spheroidal
31
The ML cusp = __/__ mesiodistal width of the tooth from the lingual view on the maxillary 1st molar?
ML is the most broad and the longest cusp on the maxillary 1st molar?
32
What is the 5th cusp on the maxillary 1st molar called?
Cusp of Carabelli
33
From the lingual, how many roots are visible?
3 roots
34
Which root is the longest on the maxillary 1st molar?
Lingual/palatal root
35
The lingual root is _____ ______ with the lingual groove (or buccal groove, or midpoint of MD dimension)?
In line
36
Where is the depression located on the lingual aspect of a maxillary 1st molar?
Lingual aspect (from the terminus of the lingual groove extending to the middle 1/3 of the root).
37
From the mesial, what is the outline form of the maxillary 1st molar?
Trapezoidal
38
From the mesial the tooth converges occlusally: maximum B-L width at the ______
Cervix
39
Only the ____ and ____ cusps are visible form the the mesial view of the maxillary 1st molar?
MB, and ML (and 5th minor cusp - cusp of carabelli)
40
The buccal HOC on the maxillary 1st molar (mesial view):
Cervical 1/3
41
The lingual HOC on the maxillary 1st molar (mesial view)
Middle 1/3
42
The mesial contact area on maxillary 1st molar (mesial view) is located in the ________? and is offset ______?
Middle 1/3; offset buccally
43
From the mesial, which roots are visible on maxillary 1st molars?
MB and Lingual/palatal
44
The MB root is _______ BL and hides the ______ root (mesial view)
broad; DB
45
Lingual root on maxillary 1st molar: ______ BL (banana shaped)
Narrow
46
What % of the times does the lingual root curve? What direction?
50%; buccally
47
What is the level of bifurcation ( __mm apical to CEJ) mesial view of maxillary 1st molar?
3mm
48
Maxillary 1st molar: Distal view Crown constricts towards the _______, therefore the _______ aspect is visible from the distal.
distal; buccal
49
Maxillary 1st molar: Distal view How many major cusps are visible?
4 major cusps
50
Maxillary 1st molar: Distal view How many roots are visible?
3 roots
51
Maxillary 1st molar: Distal view Bifurcation is about ___mm apical from the CEJ
5mm
52
Maxillary 1st molar: Distal view Distal contact area is in the _______, and offset to the ______
Middle 1/3; offset to the buccal
53
Maxillary 1st molar: Distal view There is a ____ concavity around the ______ area
DB concavity; cervical area
54
Maxillary 1st molar: Occlusal view What is the outline form? What angles are acute? What angles are obtuse?
Rhomboidal Acute = MB & DL Obtuse = ML & DB
55
Maxillary 1st molar: Occlusal view Crown wider _____ than _____
Wider BL than MD
56
Maxillary 1st molar: Occlusal view The mesial aspect (greater or less) than distal aspect?
Greater
57
The maxillary 1st molar is the ONLY tooth which (broadens/shortens) toward the lingual?
Broadens
58
The MD width is (greater/less than) the L side than it is on the buccal?
Greater
59
Maxillary 1st molar: Occlusal view Order the cusps: largest to smallest
(largest) ML MB DB DL Fifth cusp (cusp of carabelli) (smallest)
60
Maxillary 1st molar: Occlusal view Which cusps form the primary molar triangle (trigon)?
ML, MB, and DB cusps
61
Maxillary 1st molar: Occlusal view The oblique ridge is formed by the ______ cusp ridge of the ____ cusp and the triangular ride of the ____ cusp
Distal; ML; DB
62
Maxillary 1st molar: Occlusal view How many major fossae are located here?
2 major fossae
63
Maxillary 1st molar: Occlusal view What are the 2 fossae located here?
Central and Distal fossa
64
Maxillary 1st molar: Occlusal view The central fossae lies where?
In the center of the trigon, mesial to the oblique ridge, roughly triangular
65
Maxillary 1st molar: Occlusal view The distal fossae lies where?
Distal to the oblique ridge, roughly linear
66
Maxillary 1st molar: Occlusal view How many minor fossae are there?
2 minor fossae: - mesial triangular fossa - distal triangular fossa
67
Maxillary 1st molar: Occlusal view How many pits are there? What are their names?
2 pits: - central pit - distal pit
68
Maxillary 1st molar: Occlusal view Where is the central pit located?
Junction of central developmental groove, buccal groove, transverse groove of oblique ridge
69
Maxillary 1st molar: Occlusal view Where is the distal pit located?
Junction of distal oblique groove, lingual groove
70
The maxillary 1st molar has a __________. Meaning the root divides into ___ roots?
Trifucation; 3 roots
71
Maxillary 1st molar: Level of Furcations: Mesial: __mm apical to CEJ Buccal: __mm apical to CEJ Distal: __mm apical to CEJ
Mesial: 3mm Buccal: 4mm Distal: 5mm
72
Maxillary 1st molar: Proximal contacts Mesial: _____________ offset to ________ Distal: _____________ offset to ________
Mesial: middle 1/3 offset to buccal Distal: middle 1/3 offset to buccal
73
What tooth & view?
Maxillary 1st molar - Buccal view
74
What tooth & view?
Maxillary 1st Molar - Lingual view
75
What tooth & view?
Maxillary 1st molar - Mesial view
76
What tooth & view?
Maxillary 1st molar - Distal view
77
What tooth & view?
Maxillary 1st molar - Occlusal view
78
What tooth & view?
Maxillary 1st molar - Buccal view
79
What tooth & view?
Maxillary 1st molar - Lingual view
80
What tooth & view?
Maxillary 1st molar - Mesial view
81
What tooth & view?
Maxillary 1st molar - Distal view
82
What tooth & view?
Maxillary 1st molar - Occlusal view

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