Specific facts on premolars

Question 1

Mandibular premolar crowns tilt in what direction?

Answer 1

Tilted lingually

Question 2

From the proximal view what is the outline of the mandibular premolar and the maxillary premolar?

Answer 2

Mandibular premolar = rhomboid

Maxillary premolar = trapezoidal

Question 3

Which premolar has equal lengths for buccal and lingual cusps?

Answer 3

Maxillary 2nd Premolar

Question 4

Which premolar has its lingual cusps 1.0mm shorter than buccal cusps?

Answer 4

Maxillary 1st premolar

Question 5

From the occlusal view, what is the shape of the mandibular premolars

Answer 5

square

Question 6

From the occlusal view what is the shape of the maxillary premolars

Answer 6

Rectangular - wider buccolingually

Question 7

For which tooth are the mesial cusp slopes longer than distal cusp slopes?

Answer 7

Maxillary 1st premolar

Question 8

What is the angle made by the buccal cusps of maxillary first premolars?

Answer 8

More pointed at 105

Question 9

What is the angle made by the maxillary second premolars?

Answer 9

Less pointed at 120

Question 10

Which tooth has more prominent buccal ridges from the occlusally and facially?

Answer 10

Maxillary 1st premolar

Question 11

Which premolar has a divided root?

Answer 11

Maxillary 1st premolar

Question 12

Which premolars have their lingual cusp tipped toward the mesial?

Answer 12

Maxillary premolars

Question 13

How long is the root trunk before it bifurcates for the maxillary 1st premolar?

Answer 13

7.0 mm

Question 14

Which premolar has a mesial crown concavity?

Answer 14

Maxillary 1st premolar

Question 15

Which premolar has mesial marginal ridge grooves?

Answer 15

Maxillary 1st premolar

Question 16

Which premolar has a small central groove?

Answer 16

Maxillary 2nd premolar

Question 17

Which premolar is more symmetrical overall?

Answer 17

Maxillary 2nd premolar

Question 18

Which premolar has a kidney bean cross-section and why?

Answer 18

Maxillary 1st premolar because the mesial concavity which causes the mesial marginal groove to continue to the mesial proximal suface.

Question 19

Which mandibular premolar is more pointed and what is the angle?

Answer 19

Mandibular first premolar is more pointed at 110 degrees compared to 130 degrees

Question 20

For the mandibular 1st premolat where is the mesial proximal contact in relation to the distal proximal contact?

Answer 20

Mesial proximal contact is more cervical and distal proximal contact is more occlusal

Question 21

Describe the lingual cusp of the mandibular first premolar.

Answer 21

Small and nonfunctional

Question 22

Lingual cusps for mandibular second premolar is positioned more to which direction?

Answer 22

Mesially positioned

Question 23

Which premolar has a mesiolingual groove separating the mesial marginal ridge from the lingual cusp?

Answer 23

Mandibular 1st premolar

Question 24

If there are two lingual cusps on a mandibular 2nd premolar then which is the bigger lingual cusp?

Answer 24

Mesiolingual cusp

Question 25

On which prmolar does the mesial marginal ridge slope cervically toward the lingual and at what angle?

Answer 25

Mandibular 1st premolar 45 degree angle

Question 26

Which premolar is mostly likely to not have mid-root depressions?

Answer 26

Mandibular 2nd premolar

Question 27

What is the occlusal outline of the mandibular 1st premolar?

Answer 27

Diamond

Question 28

Name the two teeth that have a longer mesial cusp slope than the distal cusp slope.

Answer 28

Primary maxillary canine | Permanent Maxillary 1st premolar

Question 29

Is the distal marginal ridge or mesial marginal ridge located more cervically?

Answer 29

Distal marginal ridge is located more cervically

Question 30

Which tooth has the lingual cusp at the same height as the facial cusp?

Answer 30

Maxillary 2nd premolar

Question 31

which premolar has a lot of supplemental grooves?

Answer 31

Maxillary 2nd premolar

Question 32

Which premolars is frequently bifurcated for 1/2 length with buccal and lingual root?

Answer 32

Maxillary 1st premolar