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Dental Anatomy > Quiz 3 Review > Flashcards

Quiz 3 Review Flashcards

1
Q

Maxillary first molars: which cusps from the facial view are more pointed?

A

The facial cusps are more pointed than the lingual cusps

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2
Q

Maxillary first molars: (Facial) At which angle do the cuspal ridges of the mesiofacial cusp meet?

A

An obtuse angle

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3
Q

Maxillary first molars: (Facial) At what angle do the cuspal ridges of the distofacial cusp meet?

A

90 degree angle

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4
Q

Maxillary first molars: (Facial) the facial groove extends occlusocervically between which two cusps to a point near the center of the facial surface, with a slight angulation at the facial pit location toward the distal?

A

Extends occlusocervically between the mesiofacial and distofacial cusps

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5
Q

Maxillary first molars: (Facial) The facial surface has what extending laterally (both mesially and distally) from the cervical limit of the facial groove?

A

A slight depression

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6
Q

Maxillary first molars: (Facial) T or F, the depression on the facial surface is occlusal to and perpendicular to the cervical ridge

A

False, it is occlusal to and parallel to the cervical ridge

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7
Q

Maxillary first molars: (Facial) The facial surface has vertical facial ridges extending in which direction terminating where?

A

Extending cervically from the cusp tip of each facial cusp, terminating in the cervical third

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8
Q

Maxillary first molars: (Facial) the cervical ridge runs in what direction just occlusal to the cervical line but only in what portion of the crown?

A

Runs mesiodistally just occlusal to the cervical line but only in the mesial two-thirds of the cervical third of the crown

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9
Q

Maxillary first molars: (Facial) The root trunk averages what length?

A

4 mm

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10
Q

Maxillary first molars: (Facial) The distofacial root is ______ and _______ than the mesiofacial root

A

Straighter and Shorter

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11
Q

Maxillary first molars: (Facial) Which root extends apically with a slight mesial curve for what portion of its length? then it curves which direction?

A

Mesiofacial root extends apically with a slight mesial curve for two-thirds of its length, then curves slightly to the distal

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12
Q

Maxillary first molars: (Lingual) Which cusp is well-developed and takes up 40% of the total mesiodistal width of the crown?

A

The distolingual cusp

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13
Q

Maxillary first molars: (Lingual) Distolingual cusp tip can be described as what?

A

It is so rounded that it is sometimes described as spheroidal

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14
Q

Maxillary first molars: (Lingual) T or F, The occlusal outline of the distolingual cusp joins the distal outline of the crown in an arc that is almost that of a semicircle

A

True

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15
Q

Maxillary first molars: (Lingual) The lingual groove begins where? From this origin it slants in which direction?

A
  • Begins at the lingual border of the occlusal table as an extension of the distal oblique groove.
  • From this origin between the MESIOLINGUAL and DISTOLINGUAL cusps, it slants cervically and diagonally across the lingual surface until it reaches a position near the center of the mesiodistal width of the surface, then it turns more parallel with the long axis of the tooth.
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16
Q

Maxillary first molars: (Mesial) The triangular ridges of what two cusps are not as inclined as what premolars?

A
  • Mesiofacial and Mesiolingual cusps

- Maxillary premolars

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17
Q

Maxillary first molars: (Mesial) Which groove crosses the mesial marginal ridge and travels slightly onto the mesial surface and is lined up with the vertical long axis of the tooth

A

A mesial marginal groove

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18
Q

Maxillary first molars: (Mesial) Root trunk is slightly shorter on what aspect of the facial view?

A

On the mesial aspect

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19
Q

Maxillary first molars: (Mesial) How many of the roots of this tooth are visible from the mesial view and why?

A
  • Only two of the three roots are visible

- Since the mesiofacial root is much wider faciolingually and slightly longer than the distofacial root

20
Q

Maxillary first molars: (Mesial) Which root surface shows a concavity in the trifurcation area?

A

The mesial root surface

21
Q

Maxillary first molars: (Mesial) the outline of which root often extends facially in its middle one-third almost beyond the greatest projection of the crown?

A

The facial outline of the mesiofacial root

22
Q

Maxillary first molars: (Mesial) In which third of the root does the mesiofacial root curve lingually to a relatively blunt apex that is approximately in line with the tip of the mesiofacial cusp?

A

The middle third

23
Q

Maxillary first molars: (Distal) The crown of this tooth is narrower in what half of the tooth?

A

Distal half

24
Q

Maxillary first molars: (Distal) It is possible to see much of what surface when viewing the tooth from the distal aspect?

A

Facial surface

25
Q

Maxillary first molars: (Distal) There is a shallow, but consistent root surface depression that extends from what third of the root across the cervical line onto what third of the crown?

A

Cervical third of the root across the cervical line onto the cervical third of the crown.

26
Q

Maxillary first molars: (Distal) the distal depression seen on maxillary first molars makes clinicians be careful why?

A

They must be careful to restore class II preparations on this surface or be mindful of calculus deposits that may engulf the depression, making the calculus difficult to remove.

27
Q

Maxillary first molars: (Occlusal) The cusp sizes in order from largest to smallest

A

Mesiolingual cusp (very large), mesiofacial, distolingual, distofacial and fifth (Carabelli’s) in that order

28
Q

Maxillary first molars: (Occlusal) There are how many major fossae located on either side of the mid-point of the oblique ridge

A

2 major fossae, they are named the central fossa and the ditsal fossa

29
Q

Maxillary first molars: (Occlusal) the cusp sizes in order from smallest to largest

A 
Fifth cusp (Carabelli)
Distofacial
Distolingual
Mesiofacial
Mesiolingual (Very large)
30
Q

Maxillary Second Molars: (Facial) The facial groove is what in comparison to the maxillary first molar?

A

Short and more distally positioned, especially in comparison to the maxillary first molar

31
Q

Maxillary Second Molars: (Facial) Which cusp is wider between the mesiofacial and distofacial

A

Mesiofacial cusp is wider than the distofacial cusp

32
Q

Maxillary Second Molars: (Facial) Cervical line is what shape from mesial to distal, except for what?

A

Cervical line is straight across from mesial to distal, except for an apical dip in the mid-point area of the crown

33
Q

Maxillary Second Molars: (Lingual) At what degree angle does the mesial cuspal ridge of the mesiolingual cusp meet the relatively straight mesial outline of the crown?

A

At a 115 degree angle. NOT 90 DEGREES

34
Q

Maxillary Second Molars: (Lingual) Which cusp is well developed and takes up 35% of total mesiodistal width of the crown?

A

Distolingual cusp

35
Q

Maxillary Second Molars: (Mesial) A portion of how many cusp tips can be seen from the mesial aspect and which ones are they?

A

3 of the four cusp tips

- Mesiofacial, Mesiolingual and Distofacial

36
Q

Maxillary Second Molars: (Mesial) The facial and lingual outlines of the crown are both what? Concave or Convex?

A

Convex

37
Q

Maxillary Second Molars: (Mesial) The mesial marginal ridge outline displays what type of an outline devoid of what?

A

A semicircular curvature, devoid of a groove

38
Q

Maxillary Second Molars: (Occlusal) How many cusps are well-developed from this view?

A

4

39
Q

Maxillary Second Molars: (Occlusal) Which cusp is the most facially and mesially placed cusp?

A

The mesiofacial cusp

40
Q

Maxillary Second Molars: (Occlusal) List the order of cusp sizes from largest to smallest

A

Mesiolingual
Mesiofacial
Distofacial
Distolingual

41
Q

Maxillary Third Molars: (Mesial) The crown to root ratio in length. Is this significant for molars?

A

Crown to Root ratio: 1:2

The root is only twice the length of the crown, which is short for molars

42
Q

Maxillary Third Molars: (Occlusal) The four cusps in order from largest to smallest

A

Mesiofacial
Mesiolingual
Distofacial
Distolingual

43
Q

Maxillary Second Molars: (Occlusal) The cusps of second molar from smallest to largest in size

A

Distolingual
Distofacial
Mesiofacial
Mesiolingual

44
Q

Maxillary Third Molars: (Occlusal) What are the major pits of the third molars?

A

Central, Mesial and distal triangular

45
Q

Maxillary Third Molars: (Occlusal) T or f, A definite lingual groove is evident and separates the mesiolingual and distolingual cusps

A

False, it is not evident that separates the mesiolingual and distolingual cusps

Dental Anatomy (8 decks)

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