Molars Flashcards

1
Q

How many roots do molars possess

A

Uppers - 3
Lowers - 2

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2
Q

Characteristics of an upper first molar

A

Diamond shaped
Very small disto-palatal cusp
Strong ridge of enamel (oblique ridge)

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3
Q

What is found either side of the oblique ridge

A

Fissure

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4
Q

Which tooth often possesses a H like shape on the occlusal surface

A

Upper first molar

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5
Q

Which cusp is bordered by a fissure which runs onto the buccal surface on the upper first molar

A

Meso-buccal cusp

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6
Q

Which cusp is largest on an upper first molar

A

mesio-palatal

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7
Q

What two cusps form the oblique ridge

A

Mesio-palatal
Disto-buccal

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8
Q

What percentage of first molars have a tubercle of carabelli

A

60%

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9
Q

Which cusp would a tubercle of carabelli be found

A

Mesio-palatal

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10
Q

Where are the 3 roots on an upper first molar situated

A

2 buccal
1 palatal
Lingual root is in the same plane as the disto-buccal root

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11
Q

Which tooth is smaller upper 1st or 2nd molar

A

2nd

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12
Q

Which tooth may be missing a disto-palatal cusp

A

Upper second molar

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13
Q

Which shape can an upper 2nd molar be classified as

A

Triangle

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14
Q

Which tooth often has a partially fused roots

A

Upper 2nd molar

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15
Q

Which molar has the smallest crown with usually only 3 cusps

A

Upper 3rd molar

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16
Q

What cusp would an upper 3rd molar be missing

A

Disto-lingual cusp

17
Q

Which tooth may show a completely irregular form with a ring of small cuspules

A

Upper third molar

18
Q

How many cusps does a lower first molar have

A

5
3-buccal
2-lingual

19
Q

Which is the smallest cusp of a lower first molar

A

Distal cusp

20
Q

Which tooth possesses a groove starting on the buccal surface deepening into a transverse fissure across the occlusal surface and ending as a groove on the lingual surface

A

Lower first molar

21
Q

Which root is usually curved, grooved and broader on a lower first molar

A

Mesial root

22
Q

Which direction do the roots of a lower 1st molar usually point

23
Q

Which molar is at greater risk of caries

A

Lower first molar due to the buccal surface pit formed from the buccal groove

24
Q

Which molar often has a square shape

A

Lower second

25
Which cusp is the largest on a lower second molar
Mesio-buccal cusp
26
How can optimal occlusion be achieved when considering the upper first molars in restoration
Mesial palatal cusp should be on the occlusal plane whereas the buccal cusps should be raised from the plane