Molars Flashcards

1
Q

What shape is the occlusal outline from an occlusal view of mx 1st molars?

A

rhomboidal

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2
Q

Which angles on max 1st molars are acute?

A

mesiofacial and distolingual

*rhomboidal shape

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3
Q

which angles on max 1st molars are obtuse?

A

mesio-lingual and disto-facial

**rhomboidal shape

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4
Q

what direction does the max 1st molar taper?

A

facial

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5
Q

are the buccal or lingual embrasures larger?

A

buccal

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6
Q

which root of the 1st mx molar is the largest?

A

palatal

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7
Q

which root of the 1st mx molar is the smallest?

A

disto-buccal

*MB root needs rom for MB2 canal, so it needs to be bigger

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8
Q

which tooth when viewed from the facial has the lingual root and facial groove lined up?

A

mx 1st molar

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9
Q

When the mx 1st moalr has a 4th canal, which root is it typically located in?

A

mesio-buccal

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10
Q

where are the 3 furcations of the mx 1st molar located?

A

mesial, buccal, distal

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11
Q

which furcation is closest to the cervial line in mx 1st molars?

A

mesial

  • M –> B –> D
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12
Q

what landmark is the distal boundary of the mx 1st molar?

A

oblique ridge

*obtuse angles of the rhomboidal shape coincide with the direction of the ridge

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13
Q

what angles connect the oblique ridge in the mx 1st molar?

A

ML and DB

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14
Q

which cusp of the mx 1st molar occludes wit the central fossa of the mandibular molars?

A

ML

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15
Q

which tooth has the greatest FL diameter?

A

mx 1st molar

*think of the cusp of carabelli

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16
Q

Which tooth is the closest in size FL vs MD in MAX. POSTERIOR teeth?

A

mx 1st molar

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17
Q

Which part of the mx 1st molar is longer? MD on the facial side, or MD on the lingual side?

A

mesio-distal on the facial side

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18
Q

which cusp of mx 1st molar is the largest and longest?

A

mesio-lingual cusp

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19
Q

which tooth is most likely to be forced into the maxillary sinus during extraction?

A

mx 1st molar

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20
Q

Does the mx 1st or 2nd molar have a shorter disto-lingual groove?

A

mx 1st molar

21
Q

if the disto-lingual cusp is missing, which tooth can have 3 cusps and look like a heart?

A

mx 2nd molar

22
Q

which molar has roots that are less divergent and more distally inclined than the others?

A

mx 2nd molar

23
Q

what shape is the mx 2nd molar in a cross section at the cervical line?

A

triangular

24
Q

what tooth has a Y or dryopethicus groove pattern?

A

md 1st molar

25
Q

what is the occlusal outline of the md 1st molar?

A

pentagon

26
Q

Which cusp of md 1st molar is smallest?

A

distal cusp

*MB > ML > DL > DB > D

27
Q

what cusp of the md 1st molar is the largest?

A

MF

**MB > ML > DL > DB > D

28
Q

Which tooth has the LARGEST M-D dimension of ANY tooth?

A

Md 1st molar

  • it has the distal cusp
  • Longest M-D of All teeth, mandibulars, posteriors, and molars
29
Q

what tooth is the only mandibular one to be longer MD than FL

A

md 1st molar

*Longest M-D of All teeth, mandibulars, posteriors, and molars

30
Q

which tooth is the only posterior tooth that is wider MD than FL?

A

md 1st molar

*Longest M-D of All teeth, mandibulars, posteriors, and molars

31
Q

which tooth has the largest F-L dimension of any other mandibular tooth?

A

md 1st molar

*mx 1st molar has largest FL of any tooth

32
Q

what tooth has the largest occlusal-cervical crown dimension than any other tooth?

A

md 1st molar

33
Q

When compared to the ascending ramus, where are the facial surfaces of the md 1st molar?

A

medial

  • think of an IA block
  • same with md 2nd molar
34
Q

how many facial cusps does the md 1st molar have?

A

3

35
Q

what is the deveopmental groove between the disto-buccal/facial and distal cusp on the md 1st molar called?

A

the disto-facial groove

36
Q

md 1st molar has how many roots and canals?

A

2 roots, 3 canals

*2 in mesial root

37
Q

what tooth has the longest root of any other molar?

A

md 1st molar

*mx canine root is longest of any rooth

38
Q

what tooth has the greatest root separation?

A

md 1st moalr

39
Q

what md 1st molar cusps occlude in the central fossa of the maxillary molars?

A

DB cusps

40
Q

what about md 1st molar accommodates working movements?

A

ideal position and height of lingual cusps

41
Q

how do you tell a right vs left md 2nd molar?

A

the FL on the mesial side is wider

42
Q

the crown of the md 2nd molar inclines in what direction?

A

mesial and lingual

43
Q

how many teeth does a mx 3rd molar occlude with?

A

1

*md centrals also only occlude with 1

44
Q

what molar most frequently has 3 cusps?

A

mx 3rd molar

45
Q

from an occlusal view, what shape is the mx 3rd molar?

A

heart

46
Q

what toot has the great variation in crown morphology?

A

md 3rd molars

*then mx laterals

47
Q

what tooth has the greatest distal root inclination of any other tooth?

A

md 3rd molars

48
Q

what mandibular tooth has the shortest root of any other mandibular tooth?

A

md 3rd molars