Permanent Mandibular Molars

Question 1

What can you see from the buccal view on mandibular first molars?

Answer 1

both lingual cusp tips

Question 2

How many buccal cusps do mandibular first molars have and what are they?

Answer 2

three- mesiobuccal, distobuccal, and distal

Question 3

How many buccal cusps do mandibular second molars have and what are they?

Answer 3

two- mesiobuccal and distobuccal

Question 4

What is visible from the buccal view on mandibular second molars?

Answer 4

both lingual cusp tips

Question 5

How many buccal grooves do mandibular first molars have and what are they?

Answer 5

two- mesiobuccal and distobuccal

Question 6

How many buccal grooves do mandibular second molars have?

Answer 6

one

Question 7

How many buccal roots do mandibular first and second molars have and what are they?

Answer 7

2 roots- mesial and distal

Question 8

Which mandibular molar has roots that are more widely separated with a short root trunk?

Answer 8

first

Question 9

Which mandibular molar has roots that are less separated or more parallel with a longer root trunk?

Answer 9

second

Question 10

Which mandibular molar has roots that are more curved?

Answer 10

first

Question 11

Which mandibular molar has straighter roots?

Answer 11

second

Question 12

Which mandibular molar has roots that both apices are directed toward the centerline of the tooth and are similar in shape to the handle of pliers?

Answer 12

second

Question 13

Which mandibular molar has a mesial root that bows out beyond the mesial crown outline and then curves back distally ?

Answer 13

first

Question 14

Which mandibular molar has a more pointed apex of the straighter distal root that often lies distal to the distal crown outline?

Answer 14

first

Question 15

Which mandibular molar has a shorter root trunk?

Answer 15

first

Question 16

Which mandibular molar has a distal cusp which is the smallest cusp on the buccal surface?

Answer 16

first

Question 17

Which mandibular molar has a distobuccal cusp which is the smallest cusp on the buccal surface?

Answer 17

second

Question 18

Which mandibular molar has a crown that tapers and is shorter toward the distal?

Answer 18

both first and second

Question 19

Which mandibular molar has a crown that has more distal bulge beyond the root than on the mesial?

Answer 19

both first and second

Question 20

Is the mesial or distal root longer on both first and second molars?

Answer 20

mesial

Question 21

Which groove separetes the mesiolingual cusp from the distolingual cusp?

Answer 21

lingual groove

Question 22

Which mandibular molar has less crown taper to the lingual?

Answer 22

second

Question 23

Which mandibular molar has less root spread?

Answer 23

second

Question 24

Which mandibular molar has more curved roots?

Answer 24

first

Question 25

Which surface of the root trunk has a depression between the bifurcation and the cervical line on both mandibular molars?

Answer 25

lingual surface

Question 26

On both mandibular molars the cervical line is relatively straight mesiodistally but may dip in which direction toward the bifurcation between the mesial and distal roots?

Answer 26

cervically

Question 27

Which cup is the longest cusp for both first and second molars?

Answer 27

mesiolingual

Question 28

Which marginal ridge is more cervical than the mesial marginal ridge on both first and second mandibular molars?

Answer 28

distal marginal ridge

Question 29

Which mandibular molar has a mesial root that is less wide faciolingually with a curved tip?

Answer 29

second

Question 30

Which mandibular molar has a mesial root that is wide faciolingually with a blunt tip?

Answer 30

first

Question 31

Which mandibular molar has a crown that is wider faciolingually than occlusocervically?

Answer 31

first

Question 32

On both mandibular first and second molars, which root usually has a deep longitudinal depression on its mesial surface and an even deeper longitudinal depression on its distal depression?

Answer 32

mesial root

Question 33

What do the depressions on the mesial and distal roots indicate?

Answer 33

likelihood of two root canals in the mesial root, one buccal and one lingual

Question 34

In the proximal surface of both mandibular molars, which root is broader buccolingually so the distal root is not seen from the mesial view?

Answer 34

mesial

Question 35

Which marginal ridge on both mandibular molars is more cervical?

Answer 35

distal marginal ridge

Question 36

Which crown has the largest mesiodistal dimension of any tooth in the mouth?

Answer 36

mesiodistal crown

Question 37

Which mandibular molar typically has five cusps?

Answer 37

first

Question 38

Which mandibular molar typically has four cusps?

Answer 38

second

Question 39

Which mandibular molar has mesial marginal ridges that are more occlusally located?

Answer 39

both first and second

Question 40

Which mandibular molar has a more prominent buccal cervical ridge?

Answer 40

second

Question 41

What is the shape of mandibular first molars?

Answer 41

pentagon

Question 42

What is the shape of mandibular second molars?

Answer 42

rectangular

Question 43

Which mandibular molar has more crown taper from buccal to lingual?

Answer 43

first

Question 44

Which mandibular molar has less supplemental (secondary) grooves?

Answer 44

first

Question 45

What is the shape of central grooves on second molars?

Answer 45

straight

Question 46

What is the shape of central grooves on first molars?

Answer 46

zigzag from mesial to distal

Question 47

Which mandibular molar has buccal and lingual grooves that intersect with a central groove like a +?

Answer 47

second

Question 48

How many fossae are on both first and second mandibular molars and what are they?

Answer 48

three- central, smaller mesial triangular, and distal triangular

Question 49

Which mandibular molar has a crown that taper narrower in the distal third?

Answer 49

first

Question 50

Which cusps are the largest on both first and second molars on the occlusal surface?

Answer 50

mesiolingual and mesiobuccal