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Flashcards in Dental Anatomy Permanent Molars Deck (61)
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1

the occlusal outline form of an occlusal view for the maxillary first molar is ___

rhomboidal

2

in the occlusal outline of maxillary 1st and 2nd molars, which angles tend to be acute?

-mesiofacial and distolingual
-therefore, the mesiolingual and distofacial angles tend to be obtuse

3

the maxillary 1st molar tends to taper in which direction/? what is the result with respect to embrasures?

tends to taper toward the facial rather than lingual, so the buccal embrasure is larger than the lingual

4

what are the most prone facial and lingual surfaces of molars?

-lingual of maxillary molars and facial of mandibular molars

5

the largest root of the maxillary molar is the ___

palatal

6

the smallest root of the maxillary molar is the ___

distobuccal (remember, the MB root needs room for MB2 so it will be bigger than the DB root)

7

in the maxillary 1st molar, from the ___ view, the apex of the palatal root is in line with the facial groove of the tooth

facial view

8

in the maxillary 1st molar, from the ___ view, the apex of the palatal root is in line with the midpoint of the MD diameter

lingual view

9

when a 4th canal is present in a maxillary 1st molar, it is usually present in which root/canal system?

MB (MB2)

10

of the 3 furcations of a maxillary 1st molar, the ___ is closest to the cervical line

-mesial
-distance of furcations from cervical line: M < B < D

11

of the 3 furcations of a maxillary 1st molar, the ___ is the furthest from the cervical line

-distal
-distance of furcations from cervical line: M < B < D

12

the oblique ridge of maxillary molars forms the ___ boundary of the central fossa

distal

13

in the maxillary molars, the _(acute/obtuse)_ corners coincide with the direction of the oblique ridge

obtuse

14

the center of the oblique ridge on a maxillary 1st molar is at the same level with the ___

marginal ridge

15

the oblique ridge of maxillary molars connects which cusps?

ML and DF

16

which cusp of maxillary molars occludes in the central fossa of mandibular molars?

ML

17

which tooth has the greatest FL diameter of the crown for all teeth?

maxillary 1st molar (think of the cusp of carabelli)

18

which maxillary posterior tooth is closest in size FL vs MD?

maxillary 1st molar

19

is the maxillary 1st molar wider MD toward the facial or lingual?

facial

20

what is the only cusp of the maxillary molars that is not part of the molar cusp triangle?

DL

21

what is the largest and longest cusp on maxillary 1st molars?

ML

22

which tooth is most commonly forced into the maxillary sinus during an extraction?

maxillary 1st molar

23

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

maxillary 1st molar

24

does the maxillary 1st or 2nd molar have a shorter DL groove?

1st is shorter than 2nd

25

what is the shape of a maxillary molar is the DL cusp is not present?

3-cusp heart shape

26

the roots of maxillary 2nd molar tend to be _(more/less)_ divergent and have _(greater/fewer)_ distal inclinations

less, greater

27

the cervical cross sectional outline of the primary maxillary 2nd molar is roughly what shape?

triangular

28

what is the groove pattern for the mandibular 1st molar?

Y or dryopethicus pattern

29

the occlusal outline of a mandibular 1st molar is a ___

pengaton

30

the smallest cusp of the mandibular 1st molar is the ___

-distal cusp
-MB > ML > DL > DB > D