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tooth morphology 1 > premolars > Flashcards

premolars Flashcards

1
Q

how may roots does an upper 1st premolar have?

A

2

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2
Q

compare the buccal and palatal cusps of the upper 1st premolar

A

buccal cusp larger, higher and wider

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3
Q

describe the lingual cusp of an upper 1st premolar

A

distally displaced

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4
Q

which surfaces are the roots of an upper 1st premolar on?

A

buccal and palatal

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5
Q

the sharp fissure running mesio-distally on an upper 1st premolar may cross which surface, mesial or distal?

A

mesial

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6
Q

which premolars are wider on the buccal side of the occlusal surface?

A

upper 1st and 2nd

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7
Q

how many roots does an upper 2nd premolar have?

A

1

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8
Q

what is the name of the groove on the mesial side of an upper 1st premolar?

A

canine fossa

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9
Q

which tooth has a canine fossa?

A

upper 1st premolar

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10
Q

which surface is the canine fossa on?

A

mesial

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11
Q

is an upper 2nd premolar smaller or larger than an upper 1st premolar?

A

smaller

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12
Q

compare the cusps of an upper 1st and 2nd premolar?

A

upper 2nd has a reduced buccal cusp, therefore both cusps are more symmetrical in size

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13
Q

which marginal ridge is higher in an upper 2nd premolar?

A

mesial

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14
Q

which surface, buccal or lingual, is higher in a lower 1st premolar?

A

buccal

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15
Q

which tooth may be described as a canine with an occlusal surface?

A

lower 1st premolar

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16
Q

which surface of a lower 1st premolar is lower and narrower?

A

lingual

17
Q

is the lingual cusp of a lower 1st premolar distally or mesially displaced?

A

distally

18
Q

which contact area of a lower 1st premolar is smaller and flatter?

A

mesial

19
Q

which marginal rise of a lower 1st premolar is higher?

A

distal

20
Q

which crown is larger, a lower 1st or 2nd premolar?

A

lower 2nd

21
Q

how many cusps does a lower 2nd premolar have?

A

1 buccal and 1 or 2 lingual

22
Q

how do you determine the mesial and distal side of a lower 2nd premolar?

A

lingual cusp is either displaced mesially, or the mesial distal cusp is larger

23
Q

compare the height of the lingual and buccal sides of a lower 2nd premolar

A

same height

24
Q

which area, if ignored during restorative work on a lower 1st premolar, may lead to improper contact area and hang over?

A

canine fossa

25
Q

which 2 teeth have a mesial marginal ridge more cervical?

A

44 and 34

tooth morphology 1 (6 decks)

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