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Dental Morph (all material) > Lecture 6&7- Premolars > Flashcards

Lecture 6&7- Premolars Flashcards

(87 cards)

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1
Q

when do maxillary 1st premolars erupt?

A

10-11 years

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2
Q

when do maxillary 2nd premolars erupt?

A

10-12 years

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3
Q

when do mandibular 1st premolars erupt?

A

10-11 years

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4
Q

when do mandibular 2nd premolars erupt?

A

10-12 years

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5
Q

calcification time of maxillary 1st premolars

A

1.5-1.75

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6
Q

calcification time of mandibular 1st premolars

A

1.75-2

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7
Q

calcification time of maxillary 2nd premolars

A

2-2.25

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8
Q

calcification time of mandibular 2nd premolars

A

2.25-2.5

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9
Q

are maxillary 1st premolars wider BL or MD?

A

BL

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10
Q

are maxillary 2nd premolars wider BL or MD?

A

BL

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11
Q

are mandibular 1st premolars wider BL or MD?

A

BL

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12
Q

are mandibular 2nd premolars wider BL or MD?

A

BL

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13
Q

facial contour height of maxillary 1st premolars is where?

A

cervical 1/3

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14
Q

facial contour height of maxillary 2nd premolars is where?

A

cervical 1/3

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15
Q

facial contour height of mandibular 1st premolars is where?

A

cervical 1/3

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16
Q

facial contour height of mandibular 2nd premolars is where?

A

cervical 1/3

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17
Q

lingual contour height of maxillary 1st premolars is where?

A

middle 1/3

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18
Q

lingual contour height of maxillary 2nd premolars is where?

A

middle 1/3

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19
Q

lingual contour height of mandibular 2nd premolars is where?

A

middle 1/3

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20
Q

lingual contour height of mandibular 1st premolars is where?

A

middle 1/3

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21
Q

how many roots do maxillary 1st premolars have?

A

2

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22
Q

how many roots do maxillary 2nd premolars have?

A

1

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23
Q

how many roots do mandibular 1st premolars have?

A

1

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24
Q

how many roots do mandibular 2nd premolars have?

A

1

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25
shape of F/L surface of maxillary 1st premolars?
trapezoidal
26
shape of F/L surface of maxillary 2nd premolars?
trapezoidal
27
shape of F/L surface of mandibular 1st premolars?
trapezoidal
28
shape of F/L surface of mandibular 2nd premolars?
trapezoidal
29
shape of M/D surface of maxillary 1st premolars?
trapezoidal
30
shape of M/D surface of maxillary 2nd premolars?
trapezoidal
31
shape of M/D surface of mandibular 1st premolars?
rhomboidal
32
shape of M/D surface of mandibular 2nd premolars?
rhomboidal
33
shape of I/O surface of maxillary 1st premolars?
hexagonal
34
shape of I/O surface of maxillary 2nd premolars?
ovoid
35
shape of I/O surface of mandibular 1st premolars?
diamond
36
shape of I/O surface of mandibular 2nd premolars?
Y>H>U
37
which is bigger for posterior teeth? facial embrasure lingual embrasure
lingual embrasure
38
which is bigger for posterior teeth? occlusal embrasure gingival embrasure
they are equal
39
what is tooth #5?
right maxillary premolar
40
what is tooth #12?
left maxillary premolar
41
are premolars succedaneous or non-succedaneous?
succadaneous
42
are the 1st or 2nd maxillary premolars bigger?
1st
43
how many cusps do the maxillary 1st premolars have?
two
44
how many lobes do the maxillary 1st premolars develop from?
four
45
in the buccal view, which cusp arm is longer in the maxillary 1st premolars?
mesial cusp arm
46
where is the mesial contact in maxillary 1st premolars?
middle 1/3
47
where is the distal contact in maxillary 1st premolars?
middle 1/3
48
what ridge is present on the buccal surface of maxillary 1st premolars?
buccal ridge
49
which way does the crown taper in maxillary 1st premolars?
lingually
50
which cusp is longer in the maxillary 1st premolars?
buccal cusp
51
in the lingual view, which cusp arm is longer in the maxillary 1st premolars?
distolingual cusp arm *opposite of buccal cusp
52
what depression is present in the mesial view of maxillary 1st premolars?
mesial developmental depression
53
which premolars have a mesial marginal ridge developmental groove?
maxillary 1st premolars
54
which premolars have a central developmental groove?
all of them
55
in the buccal view, which cusp arm is longer in the maxillary 2nd premolars?
distobuccal cusp arm
56
in the maxillary 2nd premolars, which cusp is longer?
approximately the same size
57
where is the mesial contact in maxillary 2nd premolars?
middle 1/3
58
where is the distal contact in maxillary 2nd premolars?
middle 1/3
59
how many cusps do the maxillary 2nd premolars have?
two
60
how many lobes do the maxillary 2nd premolars develop from?
four
61
does the root of maxillary 2nd premolars have developmental depressions?
no
62
what tooth is #4?
right maxillary 2nd premolar
63
what tooth is #13?
left maxillary 2nd premolar
64
what tooth is #28?
right mandibular 1st premolar
65
what tooth is #21?
left mandibular 1st premolar
66
how many lobes do mandibular 1st premolars develop from?
four
67
what ridge is prominent on buccal view of mandibular 1st premolars?
buccal ridge
68
in the buccal view, which cusp arm is longer in the mandibular 1st premolars?
distal cusp arm
69
which premolar has the mesiolingual developmental groove?
mandibular 1st premolar
70
what does the mesiolingual developmental groove separate?
mesial marginal ridge and lingual cusp
71
do the mandibular 1st premolars have depressions on the root?
yes-mesially
72
which cusp tip in the mandibular 1st premolars has a greater distance from the CEJ?
buccal cusp tip
73
in which tooth is the mesial marginal ridge at a lower level than the distal marginal ridge?
mandibular 1st premolars
74
in the lingual view, which cusp arm is longer in the mandibular 1st premolars?
distobuccal cusp arm
75
which premolar has an uninterrupted transverse ridge?
mandibular 1st premolars
76
in mandibular 1st premolars, which triangular ridge is larger? buccal lingual
buccal triangular ridge is larger
77
what does the transverse ridge separate?
the mesial occlusal fossa from the distal occlusal fossa
78
what is tooth #29?
right mandibular 2nd premolar
79
what is tooth #20?
left mandibular 2nd premolar
80
how many cusps do the mandibular 2nd premolars have?
three OR two
81
how many lobes are the mandibular 2nd premolars derived from?
five (3 cusp) four (2 cusp)
82
which mandibular premolar has a better developed lingual lobe?
2nd
83
which premolar has a lingual groove?
mandibular 2nd premolar (3 cusp type)
84
which mandibular premolar is larger?
2nd
85
which premolar crowns have a lingual inclination?
mandibular premolars
86
which premolar crowns are centered over the root?
maxillary premolars
87
what shape is most common for the occlusal surface of the mandibular 2nd premolars?
Y

Dental Morph (all material) (10 decks)

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