Premolars

Question 1

Premolars are also called

Answer 1

bicusbids

Question 2

From the buccal view premolars are roughly ____ shaped. (true for all premolars)

Answer 2

pentagon

Question 3

What is present from the tip of the buccal cusp down to cervical line?

Answer 3

Buccal ridges

Question 4

Premolars usually have two cusps, which are …

Answer 4

one buccal and one lingual

Question 5

Which premolar often has 2 lingual cusps?

Answer 5

mandibular second premolar

Question 6

The buccal cusp tip is ____ to the midroot axis.

Answer 6

mesial

Question 7

Exception: in which premolar is the cusp tip distal to the mesial axis?

Answer 7

maxillary first premolar

Question 8

In premolars the mesial cusp ridge of the buccal cusp is ____ than the distal cusp ridge.

Answer 8

shorter

Question 9

Exception: In which premolar is the mesial cusp ridge of the buccal cusp longer than the distal cusp ridge?

Answer 9

Maxillary first premolar

Question 10

(True for all premolars) the mesial cusp ridge of the lingual cusp is ___ than the distal cusp ridge.

Answer 10

shorter

Question 11

(True for all premolars) adjacent marginal ridges tend to be the same height and form _____.

Answer 11

occlusal embrasures

Question 12

(True for all premolars) Triangular ridges from the buccal and lingual cusps meet slightly ___ to the midpoint of the occlusal surface.

Answer 12

lingual

Question 13

(True for all premolars) The ____ triangular ridge is slightly larger.

Answer 13

Buccal

Question 14

(True for all premolars) The ___ separates the two triangular ridges.

Answer 14

Central Groove

Question 15

(True for all premolars) Mesial proximal contacts are near the junction of what two thirds?

Answer 15

Junction of the occlusal and middle thirds.

Question 16

Distal proximal contacts are slightly more _____ in the middle third, than the mesial proximal contact.

Answer 16

cervical

Question 17

Exception: on what premolar may the mesial contact be more cervical than the distal contact?

Answer 17

Mandibular first premolar

Question 18

(True for all premolars) Proximal contacts are _____ to the center buccolingually.

Answer 18

buccal

Question 19

Mesial marginal ridges are more _____ than distal marginal ridges.

Answer 19

occlusal

Question 20

Exception: In which premolar may the distal marginal ridge be more occlusal than the medial marginal ridge?

Answer 20

Mandibular first premolar

Question 21

(True for all premolars) Cusp ridges and marginal ridges for the boundary of what surface?

Answer 21

Occlusal surface

Question 22

(True for all premolars) Cervical lines curve ____ on the buccal and lingual surfaces.

Answer 22

apically

Question 23

(True for all premolars) Cervical lines curve ____ on the proximal surfaces.

Answer 23

occlusally

Question 24

(True for all premolars) Mesial cervical line is ____ than the distal cervical line.

Answer 24

more convex

Question 25

(True for all premolars) Apical third of roots bend ____ more often than _____.

Answer 25

distally more often than mesially

Question 26

(True for all premolars) Lingual cusp is _____ than buccal cusp; more noticeable on first premolars.

Answer 26

shorter

Question 27

Are the maxillary 1st & 2nd or the mandibular 1st & 2nd premolars more similar?

Answer 27

maxillary

Question 28

Which maxillary premolar is larger?

Answer 28

maxillary first premolar

Question 29

Which mandibular premolar is larger?

Answer 29

mandibular second premolar

Question 30

On maxillary premolars lingual cusps are shorter BUT the the 2nd premolar cusps are almost ...

Answer 30

equal in length

Question 31

Mandibular premolars lingual cusps are relatively much shorter than buccal cusps, especially on the _____ premolar.

Answer 31

first

Question 32

Both maxillary premolars have 1 prominent _____ cusp.

Answer 32

lingual

Question 33

What premolar may have more than 1 lingual cusp?

Answer 33

mandibular second premolar

Question 34

The medial cusp ridge of ____ is the shortest.

Answer 34

the lingual cusp

Question 35

Lingual cusp tips are offset to the ____

Answer 35

mesial

Question 36

____ premolar crowns are more in line with the root axis.

Answer 36

maxillary

Question 37

____ premolars crowns tilt to the lingual.

Answer 37

Mandibular

Question 38

Maxillary premolars crowns are wider ____

Answer 38

buccolingually

Question 39

______ premolars crowns are about the same buccolingually as mesiodistally.

Answer 39

mandibular

Question 40

Triangular ridges on _______ premolars have a steeper slope towards the central groove than any other tooth.

Answer 40

Maxillary

Question 41

Buccal ridge is more prominent in _____

Answer 41

maxillary premolars

Question 42

Buccal cusp tip is located more to the ____ in the maxillary first premolar. (only premolar with buccal cusp offset to the _____)

Answer 42

distal

Question 43

Both buccal and lingual cusp tips are located slightly to the mesial on this premolar

Answer 43

Maxillary 2nd premolar

Question 44

Mesial cusp ridge of the buccal cusp is longer than the distal cusp ridge; only tooth with a longer mesial cusp ridge than distal.

Answer 44

Maxillary 1st premolar

Question 45

Mesial cusp ridge of buccal cusp is shorter than the distal cusp ridge.

Answer 45

Maxillary 2nd premolar

Question 46

In what maxillary premolar is the crown wider and longer, and the buccal cusp more pointed?

Answer 46

maxillary 1st premolar

Question 47

_____ cusp is rounded and blunt for both maxillary premolars.

Answer 47

lingual

Question 48

____ cusp is pointed for both maxillary premolars

Answer 48

buccal

Question 49

Maxillary 1st premolar almost always has what distinguishing trait?

Answer 49

mesial marginal ridge groove

Question 50

The maxillary 1st premolar is the only premolar with ....

Answer 50

mesial crown concavity (development depression)

Question 51

In which maxillary premolar is the central groove from mesial to distal pit 1/3 or less in length compared to the other?

Answer 51

Maxillary 2nd premolar

Question 52

In which maxillary premolar is the mesial and distal pits closer to the marginal ridges; marginal ridges are thin?

Answer 52

maxillary 1st premolar

Question 53

In which maxillary premolar are the marginal ridges relatively wide/thick M-D?

Answer 53

maxillary 2nd premolar

Question 54

May have several supplemental grooves giving the occlusal surface a "wrinkled" look.

Answer 54

maxillary 2nd premolar

Question 55

Occlusal outline is very angular on the buccal.

Answer 55

maxillary 1st premolar

Question 56

Occlusal table is more rounded.

Answer 56

maxillary 2nd premolar

Question 57

Buccal line angles are the sharpest in the entire mouth.

Answer 57

Maxillary 1st premolar

Question 58

MAxillary 1st premolar crown has definite tape ( ______) to lingual.

Answer 58

convergence

Question 59

Only premolar with divided (bifurcated) root and at least 2 canals

Answer 59

Maxillary 1st premolar

Question 60

May have 2 cusps or 3 cusps.

Answer 60

mandibular 2nd premolar

Question 61

On the mandibular 1st premolar, mesial half resembles canine, distal half resembles premolar; this is called?

Answer 61

transition form

Question 62

When there are 3 cusps, there is no ____

Answer 62

transverse ridge

Question 63

Premolar most likely to be congenitally missing?

Answer 63

Mandibular 2nd premolar

Question 64

Buccal cusp tip is over center of the root.

Answer 64

Mandibular 1st premolar

Question 65

Mandibular 2nd premolar, buccal cusp tip is slightly ____

Answer 65

mesial

Question 66

Mandibular 1st premolar mesial contact may be more _____ than distal contact.

Answer 66

cervical

Question 67

Mandibular 2nd premolar mesial contact is more _____ than distal (general rue for most teeth)

Answer 67

occlusal

Question 68

Lingual cusp is very small and non-functional

Answer 68

Mandibular 1st premolar

Question 69

Mandibular 2nd premolar lingual cusp is positioned to the ____ when there is 1 lingual cusp

Answer 69

mesial

Question 70

Mesiolingual groove separates mesial marginal ridge from the lingual cusp; only tooth with a mesiolingual groove.

Answer 70

mandibular 1st premolar

Question 71

Entire buccal profile is visible from the lingual.

Answer 71

mandibular 1st premolar

Question 72

The mesial marginal ridge slopes servilely toward the lingual (45 degrees)

Answer 72

mandibular 1st premolar

Question 73

Mesial marginal ridge is more horizontal

Answer 73

mandibular 2nd premolar

Question 74

Central groove is offset to the lingual

Answer 74

true for both mandibular premolars