300 Dental Anatomy: Premolars

Question 1

Which tooth has the most pronounced developmental marginal groove of any maxillary tooth?

Answer 1

MX 1PM

Question 2

Which tooth has a mesial concavity that makes it difficult to adapt a matrix band?

Answer 2

MX 1PM

Question 3

Cervical cross-section ROOT outline form for maxillary 1st premolar looks like:

Answer 3

kidney

Question 4

Cervical cross- section PULP CHAMBER shape for the maxillary 1st premolar looks like:

Answer 4

kidney

Question 5

The non-molar tooth that most frequently exhibits 3 roots:

Answer 5

MX 1PM

Question 6

The facial cusp of maxillary first premolar is offset towards the ______.

Answer 6

distal

Question 7

The mesio-facial (MF) cusp ridge of the maxillary first premolar is ____ than the distal-facial (DF) cusp ridge.

Answer 7

longer

*just like the primary MX canine!

Question 8

Which premolar has the steepest cusp inclines?

Answer 8

MX 1PM

Question 9

The maxillary premolars (1st and 2nd) lingual cusps are offset towards the _____.

Answer 9

mesial

Question 10

The maxillary premolars (1st and 2nd) buccal cusps are offset towards the _____.

Answer 10

distal

Question 11

Posterior tooth with the greatest cervical-occlusal crown height

Answer 11

MX 1PM

Question 12

Non-molar tooth with sharpest demarcation between pulp chamber and canal.

Answer 12

MX 1PM

Question 13

The size and position of the cusps are more identical for the 1st or 2nd maxillary premolar?

Answer 13

MX 2PM

Question 14

Which tooth has two cusps that are of equal height?

Answer 14

MX 2PM

Question 15

Which tooth is the most symmetrical posterior tooth?

think of cusps

Answer 15

MX 2PM

Question 16

The maxillary 2nd premolar central groove is:

Answer 16

short

Question 17

The maxillary 2nd premolar has what feature that makes it look ‘wrinkly’?

Answer 17

Lots of supplemental grooves

Question 18

Which premolar has fossa that are closest in size compared to any other posterior tooth?

Answer 18

MX 2PM

Question 19

Which tooth has a uniquely prominent triangular ridge?

Answer 19

MD 1PM

Question 20

Which tooth has frequently both a separate mesial and distal pit due to triangular ridge?

Answer 20

MD 1PM

Question 21

Which tooth looks like “snake eyes”?

Answer 21

MD 1PM

Question 22

The mesio-lingual (ML) developmental groove on tooth #21 originates from the ______.

Answer 22

occlusal pit

Question 23

The mesio-lingual (ML) developmental groove on tooth #21 extends onto the ____ surface

Answer 23

proximal

Question 24

The only tooth with a mesio-lingual (ML) groove:

Answer 24

MD 1PM

Question 25

Mesio-lingual (ML) developmental groove of the mandibular first premolar makes the mesial marginal ridge run at a ___ angle

Answer 25

45 degree

Question 26

Is the mesial marginal ridge of the MD 1st premolar located more cervical or distal?

Answer 26

cervical

Question 27

More of the occlusal surface can be seen from the mesial or distal end for a mandibular 1st premolar?

Answer 27

Mesial (due to 45 degree MMR)

Question 28

Occlusal outline shape for mandibular first premolar is:

Answer 28

diamond shaped

Question 29

In the rare event of a second canal for the mandibular 1st premolar, it is most likely located to the:

Answer 29

lingual

Question 30

The only premolar that frequently has one pulp horn:

Answer 30

MD 1PM

Question 31

The lingual cusp of the mandibular 1st premolar is approximately _____ the height of the facial cusp:

Answer 31

2/3

Question 32

The lingual cusp of the mandibular 1st premolar is similar in development to:

Answer 32

The cingulum of a canine

Question 33

The lingual cusp of the mandibular 1st premolar in normal occlusion does/does not occlude:

Answer 33

does NOT

Question 34

The most variation of all posterior teeth in facial vs. lingual cusp height:

Answer 34

MD 1PM

Question 35

The facial masticatory mucosa (attached gingival) is narrowest on the ____ of which tooth?

Answer 35

Facial aspect of the mandibular premolars

Question 36

The mandibular 1st premolar has the smallest _____ of any posterior tooth

Answer 36

facio-lingually

Question 37

Closest of all MANDIBULAR teeth in facio-lingal (FL) vs. mesio-distal (M-D) diameter

Answer 37

MD 1PM

Question 38

Viewed from the occlusal, the basic crown/coronal outline of a mandibular 2nd premolar is:

Answer 38

Pentagonal

Question 39

The occlusal table outline of a mandibular 2nd premolar is what shape?

Answer 39

Rectangular

Question 40

The premolar that is most likely to have a crescent-shaped central developmental groove:

Answer 40

MD 2PM

Question 41

The shortest interdental papilla is between which two teeth?

Answer 41

Between the mandibular 2nd premolar and 1st molar

Question 42

The Y type mandibular premolar has ___ facial and ___ lingual cusps?

Answer 42

1 facial, 2 lingual

Question 43

Y type mandibular 2nd premolar has the same number of occlusal pits as which tooth?

Answer 43

MX 1M

Question 44

The only premolar with multiple lingual cusps

Answer 44

MD 2PM

Question 45

Only premolar with a lingual groove:

Answer 45

MD 2PM

Question 46

Only premolar with a central fossa:

Answer 46

MD 2PM

Question 47

The premolar that most frequently has a single central pit:

Answer 47

MD 2PM

Question 48

The most congenitally missing premolar:

Answer 48

MD 2PM