Mandibular Molars

Question 1

how many cusp do mandib. molars usually have?

Answer 1

4-5

Question 2

what side is longer when looking at the occlusal table (a major diff. from max. molars )

Answer 2

Mand. molars mesiodistaly are longer

Question 3

what is the other main diff. from the max molars?

Answer 3

NO oblique ridge

Question 4

describe the buccal surface of the mand molars in comparison with max molars?(big difference)

Answer 4

Buccal surface is convex and tilted toward lingual

Question 5

Angles classification Class 1

Answer 5

align

Question 6

Angles classification Class 2

Answer 6

maxilla is pushed forward

Question 7

Angles classification Class 3

Answer 7

mandible is pushed forward

Question 8

Which mand molar is the largest?

Answer 8

1st

Question 9

which crown in the mouth is the largest mesiodistally?

Answer 9

1st mand molar

Question 10

which permanent tooth erupts 1st and is more subject to plaque retention?

Answer 10

1st mand molar

Question 11

What shape has the 1st mand molar due to it’s distal small cusp? (looks like the distal cusp is divided in two angled surfaces)

Answer 11

Pentagonal shape

Question 12

which surface mesial or distal is slightly larger buccolingually?? (1st mand molar)

Answer 12

mesial

Question 13

which marginal ridge is more occlusaly placed?(1st mand molar)

Answer 13

mesial

Question 14

Facial HOC?(1st mand molar)

Answer 14

Cervical 3rd (close to middle 3rd)

Question 15

Lingul HOC?(1st mand molar)

Answer 15

Middle 3rd (close to occlusal 3rd)

Question 16

Which side of the 1st mand molar are the cusp sharper?

Answer 16

Lingual

Question 17

How many cusps?(1st mand molar)

Answer 17

5

Question 18

Name all the grooves of the 1st mand molar?

Answer 18

Central, Mesiobuccal, Distobuccal, Lingual

Question 19

Which groove usually ends in a pit and may require restoration if decayed?(1st mand molar)

Answer 19

Both buccal grooves.

Question 20

Which grooves may cross the HOC?(1st mand molar)

Answer 20

Both Buccal grooves.

Question 21

which groove never crosses HOC?(1st mand molar)

Answer 21

Lingual

Question 22

How many pits does it have?(1st mand molar) Name them.

Answer 22

3.

Central, distal, and mesial.

Question 23

Which pit is the dippest and most prone to decay?(1st mand molar)

Answer 23

Central pit.

Question 24

What is the position of the roots? (1st mand molar)

Answer 24

one mesial and the secon is distal.

Question 25

Describe main characteristics of the mesial root? (1st mand molar)

Answer 25

Is flatter and has mesial and distal root depressions

Question 26

Describe the appearance of the distal root in comparison with the mesial? (1st mand molar)

Answer 26

Distal is more rounded.

Question 27

How many root canals does it have? (1st mand molar)

Answer 27

Three (2 in the mesial root )

Question 28

What is the shape of the occlusal table? (2nd mand molar)

Answer 28

Rectangular

Question 29

Which surface is larger distal/mesial buccolingual? (2nd mand molar)

Answer 29

Mesial is larger buccolingually.

Question 30

Which cusps are larger?(2nd mand molar)

Answer 30

Mesial cusps

Question 31

How often does it present a distal cusp?

Answer 31

Never.

Question 32

What does the occlusal anatomy resembles? (2nd mand molar)

Answer 32

A cross.

Question 33

Which groove is more evident buccal or lingual?(2nd mand molar)

Answer 33

Buccal?

Question 34

Describe the central groove and the single central pit? (2nd mand molar)

Answer 34

Long central groove and deep central pit.

Question 35

Compare the roots of the 2nd with the 1st mand molar?

Answer 35

Both are very similar in structure. (Mesial root is flatter with mesial and distal root depression and the distal root is more rounded) However, 2nd molar roots are less divergent and have a longer root trunk.

Question 36

Compare third mand molar with the other two?

Answer 36

Smaller and less sharper than 1st and 2nd mand molar

Question 37

describe the occlussal anatomy? (3rd mand molar)

Answer 37

too many variations

Question 38

How does the distal surface looks like? (3rd mand molar)

Answer 38

Very rounded.

Question 39

General 3rd mand molar characteristics?

Answer 39

Great number of accessory grooves, fused roots (sometimes one fused large root)