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OA Final > Molars > Flashcards

Molars Flashcards

1
Q

What shape is the occlusal view of a Mx 1st molar?

A

Rhomboidal

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2
Q

What angles of a Mx 1st molar forms a acute angle?

A

Mesiofacial and distolingual

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3
Q

What angles for the occlusal outline tend to be obtuse angles?

A

Mesiolingual and distofacial

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4
Q

What Molar tends to taper toward the facial rather then toward the lingual so the buccal embrasure is larger than the lingual?

A

Mx 1st molar

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5
Q

What is the most prone facial and lingual surfaces of the molars?

A

Lingual of the Mx and facial of the Mn

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6
Q

What root is the largest on the Mx molar?

A

Palatal

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7
Q

What is the smallest root of the Mx molar?

A

Distobuccal

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8
Q

Viewing a Mx molar from the facial, what root is in line with the facial groove of the tooth?

A

Lingual root

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9
Q

Viewing the Mx 1st molar from the lingual what root is in line with the midpoint of MD diameter?

A

Palatal root

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10
Q

When a 4th pulp canal is present on a Mx 1st molar where is it located? Which root?

A

Mesiobuccal root

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11
Q

Of the 3 furcations of the Mx 1st molars, which one is closest to the cervical line?

A

Mesial

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12
Q

Of the 3 furcations of a Mx 1st M, which one is furthest away from the cervical line?

What is the distance of all of the furcations?

A

Distal

Mesial < Buccal < distal

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13
Q

What does the oblique ridge form on the Mx 1st molar?

A

The distal boundary of the central fossa

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14
Q

What does the oblique ridge connect?

A

The mesiolingual and distobuccal cusps

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15
Q

The mesiolingual cusp of the Mx 1st molar occludes in what ?

A

In the central fossa of the Mn molar

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16
Q

Which molar has the greatest faciolingual diameter of the crown of all teeth?

A

Mx 1st molar

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17
Q

Which molar is closest in size FL vs. MD of any other Mx posterior teeth?

A

Mx 1st molar

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18
Q

Which molar has a wider M-D width toward the facial than toward the lingual?

A

Mx 1st molar

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19
Q

Which cusp of the Mx molar is not part of the molar cusp triangle?

A

Distolingual cusp

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20
Q

What is the largest and longest cusp on the Mx 1st molar?

A

Mesiolingual cusp

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21
Q

What tooth is most likely to be forced into the Mx sinus during an extraction is?

A

Mx 1st molar

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22
Q

What molar has a distal concavity that can pose special problems in matrix placement?

A

Mx 1st molar

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23
Q

What Mx molar has a shorter distolingual groove? Mx 1st or Mx 2nd molar?

A

Mx 1st molar

24
Q

In a Mx 2nd molar, if the DL cusp is not present what does the tooth shape turn into?

A

3 cusp type heart shaped

25
Q

The roots of the Mx 2nd molar tend to be ________ __________ and have a _______ distal inclination

A

Less divergent

Greater

26
Q

What is the cross sectional outline of the Mx 2nd molar at the cervical

A

Roughly triangular

27
Q

What kind of grooves pattern does the Mn 1st molar have ?

A

Y shaped or dryopethicus pattern

28
Q

What is the occlusal outline of the Mn 1st molar?

A

Pentagonal

29
Q

What is the smallest cusp of the Mn 1st molar

A

Distal cusp

30
Q

What is the largest cusp of the Mn 1st molar

Size of cusps largest to smallest

A

Mesiofacial cusp

MB>ML>DL>DB>D

31
Q

Which molar has the largest M-D crown dimension of ANY other tooth

A

Mn 1st molar

32
Q

What Mn teeth are the ONLY Mn teeth that are wider mesio-distally than facio-lingual ?

33
Q

What tooth has the LARGEST F-L crown dimension of any MN tooth?

A

Mn 1st molar

34
Q

Which Mn molar has the largest occlusion-cervical crown dimension of ant Mn tooth?

A

Mn 1st molar

35
Q

Where are the facial surfaces of the Mn molars located?

A

Medial to the border of the ascending ramus

36
Q

What is the key feature that differentiates the Mn 1st and 2nd molar is?

A

The number of developmental grooves (Mn 2nd has two)

37
Q

How many facial cusps does the Mn 1st molar have?

38
Q

The developmental groove between the DF cusp and the distal cusp of the Mx 1st molar is?

A

Distofacial

39
Q

How may roots and root canals does the Mn 1st molar have?

A

2 roots and 3 canals

40
Q

The Mx 1st molar usually have 2 ____ canals?

41
Q

Which molar has the longest root of any other molar?

A

Min 1st molar

42
Q

Which molar has the greatest root separation of any other root?

A

Mn 1st molar

43
Q

The mid root cross section of 1st molars, which has the largest and which root is it

A

Mn and mesial

44
Q

Which root of the Mn 1st molar has the greatest F-L dimension of any other root

A

Mesial root

45
Q

Which cusp of the Mn 2nd molar occludes with the central fossa of the Mx molar

A

Distobuccal cusp

46
Q

What does the the ideal position and height of lingual cusps of Mn 1st molar accommodate for?

A

Working movement

47
Q

Where is the shortest interdental papilla found ?

A

Between the Mn premolar and the Mn 1st molar

48
Q

What is the groove pattern of the Mn 2nd molar?

A

Cross pattern

49
Q

Mn molars are the only teeth that are wider?

A

Mesio-distally than faciolingually

50
Q

The crown of the Mn 2nd molar inclines to the >

A

Mesial and lingual

51
Q

Which tooth most frequently has 3 cusps?

A

Mx 3rd molar

52
Q

What is the shape of a Mx 3rd molar usually?

A

Heart shaped because they are missing the DL cusp

53
Q

Which molar has the most variation of crown morphology

A

Mn 3rd molars

54
Q

Which tooth has the greatest distal root inclination of any other tooth

A

Mn 3rd molar

55
Q

Which tooth has the shortest root of any other Mn tooth

A

Mn 3rd molar

56
Q

Which tooth has the greatest morphological variation besides the Mx laterals

A

Mn 3rd molars

OA Final (2 decks)

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