Dental Anatomy Nyucd Posterior Teeth

Front 1

All mandibular posterior crowns lean....

Back 1

lingually and distally

Front 2

All teeth taper toward the lingual (from occlusal view) except

Back 2

Maxillary 1st Molar
3-cusps Mandibular 2nd Premolar

Front 3

The lingual height of contour on ALL posterior teeth are in the

Back 3

middle 1/3

Front 4

Are there more accessory grooves in the anterior or distal teeth of posterior teeth?

Back 4

MORE toward the distal

Front 5

All premolars are what shape from the facial?

Back 5

Pentagonal

Front 6

Are premolars wider facio-lingually or mesio-distally?

Back 6

faciolingually

Front 7

In the maxillary, what tooth is larger, 1st premolar or 2nd premolar?

Back 7

2nd premolar

Front 8

In the mandibular, what tooth is larger, 1st premolar or 2nd premolar?

Back 8

1st premolar

Front 9

Are maxillary premolar crowns wider bucco-lingually or mesio-distally?

Back 9

bucco-lingually

Front 10

Are mandibular premolar crowns wider bucco-lingually or mesio-distally?

Back 10

NEITHER, nearly equal

Front 11

How many cusps on the mandibular premolar? Which cusps are more prominent?

Back 11

2 or more cusps
Buccal cusps more prominent than lingual

Front 12

How many cusps on maxillary premolar? Which cusps are more prominent?

Back 12

2 cusps
Nearly equal size

Front 13

Which posterior arches crowns are centered over the roots?

Back 13

maxillary posteriors

Front 14

Where are mandibular posterior crown situated relative to their root?

Back 14

lingual

Front 15

What is the only premolar with birfucated roots?

Back 15

maxillary first premolar

Front 16

Which premolar has 3 cusps?

Back 16

Mandibular 2nd premolar

Front 17

Which premolar has longer mesial cusp ridge than distal ridge?

Back 17

maxillary first premolar

Front 18

Which tooth approaches bilateral symmetry more than any other posterior tooth?

Back 18

Maxillary second premolar

Front 19

Which premolar has the closest cusp heights?

Back 19

Maxillary second premolar

Front 20

The longest occlusocervical posterior tooth is....

Back 20

maxillary first premolar

Front 21

The buccal cusp tip of the maxillary first premolar is set off to the ....

Back 21

distal

Front 22

The shape of the maxillary first premolar from the mesial view is...

Back 22

trapezoidal

Front 23

the mesial contact of the maxillary first premolar is offset to

Back 23

buccal

Front 24

From the mesial view, what does the maxillary second premolar lack that the maxillary first premolar has?

Back 24

mesial concavity & mesial ridge groove

Front 25

which premolar is most difficult to determine left from right? How can you tell left from right?

Back 25

maxillary second premolar
lingual cusp displacement to the medial

Front 26

The mandibular first premolar resembles ______ more than _________

Back 26

canine
mandibular first premolar

Front 27

The smallest facio-lingual dimension of any posterior tooth belongs to...

Back 27

mandibular first premolar

Front 28

In the mandible, the tooth with the most similar facio-lingual and mesiodistal crown dimensions is....

Back 28

mandibular first premolar

Front 29

How does the mandibular first premolars contact differ from almost all other teeth? What is the other tooth with this characteristic?

Back 29

distal contact is more occlusal than mesial
maxillary canine

Front 30

What is the only premolar with multiple lingual cusps?

Back 30

mandibular second premolar

Front 31

The mandibular second premolar is the only tooth with a central fossa and no _______ or _______. It is the only premolar with ______ groove.

Back 31

transverse ridge or central groove
lingual

Front 32

Which lingual cusps is taller in the mandibular second premolar?

Back 32

mesial

Front 33

From the occlusal, what "cusp shapes" can the mandibular second premolar take?
Which one is most common?

Back 33

Y, U (2 cusp), or H (2 cusp)
-Y is most common (3 cusp)

Front 34

All molars form from 4 lobes except

Back 34

mandibular 1st molar (and some 3rd molars)

Front 35

_________ crowns are shorter occluso-cervically than all other crowns (class trait)

Back 35

Molars

Front 36

Are mandibular and maxillary molars wider occluso-cervically or mesio-distally?

Back 36

mesio-distally

Front 37

In molars, the root length becomes ________ anterior to posterior

Back 37

shorter

Front 38

In molars, how does cusp size change from anterior to posterior?

Back 38

Cusps become smaller

Front 39

In molars, how does the root trunk dimensions change anterior to posterior?

Back 39

Root trunks becomes longer as you move posteriorly

Front 40

what is the 5th cusp on the first molar known as?

Back 40

Cusp of Carabelli

Front 41

Which two teeth have the largest facio-lingual crown dimension?

Back 41

Maxillary 1st molar and maxillary second molar

Front 42

How many triangular ridges do the maxillary molars have?

Back 42

2

Front 43

Which tooth has the shortest occlusocervical dimension?

Back 43

Maxillary 3rd molar

Front 44

Which tooth (teeth) have the greatest morphology of any teeth?

Back 44

Maxillary and Mandibular 3 rd molars

Front 45

Which tooth has the shortest root and greatest distal root curvature in the maxillary arch?

Back 45

maxillary 3rd molar

Front 46

which tooth has the greatest mesio-distal crown dimension in da mouf?

Back 46

mandibular first molar

Front 47

the largest facio-lingual and occlusal-cervical crown dimension in the mandibular arch is?

Back 47

mandibular first molar

Front 48

the greatest facio-lingual root dimension of any tooth?

Back 48

mandibular first molar

Front 49

The lingual cusp tip of both maxillary premolars is set off to the...

Back 49

mesial

Front 50

Which tooth has wider marginal ridges, maxillary first or second premolar? Why?

Back 50

Maxillary 2nd premolar ---> mesial and distal pits are closer together

Front 51

From the occlusal, what shape are maxillary premolars?

Back 51

Hexagonal
(although second maxillary premolar is oblong/oval)

Front 52

How do the mandibular premolar function differ?

Back 52

Mandibular first acts more as a canine while the mandibular second premolar acts like a small molar

Front 53

What are the two forms of the mandibular second premolar?

Back 53

Two lingual cusps (5 lobes) - more common
One lingual cusp (4 lobes)

Front 54

What is the only tooth where the distal contact is more occlusal than the mesial contact?

Back 54

Mandibular first molar

Front 55

The cusp tip of the mandibular first premolar is set off to the ....

Back 55

mesial

Front 56

Which slope is shorter for the mandibular first premolar, mesio-occlusal or diso-occlusal?

Back 56

mesio-occlusal

Front 57

What distinguishing groove is prevalent on the mandibular first molar

Back 57

mesiolingual developmental groove