Quiz 3 Review Flashcards
Maxillary first molars: which cusps from the facial view are more pointed?
The facial cusps are more pointed than the lingual cusps
Maxillary first molars: (Facial) At which angle do the cuspal ridges of the mesiofacial cusp meet?
An obtuse angle
Maxillary first molars: (Facial) At what angle do the cuspal ridges of the distofacial cusp meet?
90 degree angle
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?
Extends occlusocervically between the mesiofacial and distofacial cusps
Maxillary first molars: (Facial) The facial surface has what extending laterally (both mesially and distally) from the cervical limit of the facial groove?
A slight depression
Maxillary first molars: (Facial) T or F, the depression on the facial surface is occlusal to and perpendicular to the cervical ridge
False, it is occlusal to and parallel to the cervical ridge
Maxillary first molars: (Facial) The facial surface has vertical facial ridges extending in which direction terminating where?
Extending cervically from the cusp tip of each facial cusp, terminating in the cervical third
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?
Runs mesiodistally just occlusal to the cervical line but only in the mesial two-thirds of the cervical third of the crown
Maxillary first molars: (Facial) The root trunk averages what length?
4 mm
Maxillary first molars: (Facial) The distofacial root is ______ and _______ than the mesiofacial root
Straighter and Shorter
Maxillary first molars: (Facial) Which root extends apically with a slight mesial curve for what portion of its length? then it curves which direction?
Mesiofacial root extends apically with a slight mesial curve for two-thirds of its length, then curves slightly to the distal
Maxillary first molars: (Lingual) Which cusp is well-developed and takes up 40% of the total mesiodistal width of the crown?
The distolingual cusp
Maxillary first molars: (Lingual) Distolingual cusp tip can be described as what?
It is so rounded that it is sometimes described as spheroidal
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
True
Maxillary first molars: (Lingual) The lingual groove begins where? From this origin it slants in which direction?
- 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.
Maxillary first molars: (Mesial) The triangular ridges of what two cusps are not as inclined as what premolars?
- Mesiofacial and Mesiolingual cusps
- Maxillary premolars
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 mesial marginal groove
Maxillary first molars: (Mesial) Root trunk is slightly shorter on what aspect of the facial view?
On the mesial aspect
Maxillary first molars: (Mesial) How many of the roots of this tooth are visible from the mesial view and why?
- Only two of the three roots are visible
- Since the mesiofacial root is much wider faciolingually and slightly longer than the distofacial root
Maxillary first molars: (Mesial) Which root surface shows a concavity in the trifurcation area?
The mesial root surface
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?
The facial outline of the mesiofacial root
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?
The middle third
Maxillary first molars: (Distal) The crown of this tooth is narrower in what half of the tooth?
Distal half
Maxillary first molars: (Distal) It is possible to see much of what surface when viewing the tooth from the distal aspect?
Facial surface
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?
Cervical third of the root across the cervical line onto the cervical third of the crown.
Maxillary first molars: (Distal) the distal depression seen on maxillary first molars makes clinicians be careful why?
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.
Maxillary first molars: (Occlusal) The cusp sizes in order from largest to smallest
Mesiolingual cusp (very large), mesiofacial, distolingual, distofacial and fifth (Carabelli’s) in that order
Maxillary first molars: (Occlusal) There are how many major fossae located on either side of the mid-point of the oblique ridge
2 major fossae, they are named the central fossa and the ditsal fossa
Maxillary first molars: (Occlusal) the cusp sizes in order from smallest to largest
Fifth cusp (Carabelli) Distofacial Distolingual Mesiofacial Mesiolingual (Very large)
Maxillary Second Molars: (Facial) The facial groove is what in comparison to the maxillary first molar?
Short and more distally positioned, especially in comparison to the maxillary first molar
Maxillary Second Molars: (Facial) Which cusp is wider between the mesiofacial and distofacial
Mesiofacial cusp is wider than the distofacial cusp
Maxillary Second Molars: (Facial) Cervical line is what shape from mesial to distal, except for what?
Cervical line is straight across from mesial to distal, except for an apical dip in the mid-point area of the crown
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?
At a 115 degree angle. NOT 90 DEGREES
Maxillary Second Molars: (Lingual) Which cusp is well developed and takes up 35% of total mesiodistal width of the crown?
Distolingual cusp
Maxillary Second Molars: (Mesial) A portion of how many cusp tips can be seen from the mesial aspect and which ones are they?
3 of the four cusp tips
- Mesiofacial, Mesiolingual and Distofacial
Maxillary Second Molars: (Mesial) The facial and lingual outlines of the crown are both what? Concave or Convex?
Convex
Maxillary Second Molars: (Mesial) The mesial marginal ridge outline displays what type of an outline devoid of what?
A semicircular curvature, devoid of a groove
Maxillary Second Molars: (Occlusal) How many cusps are well-developed from this view?
4
Maxillary Second Molars: (Occlusal) Which cusp is the most facially and mesially placed cusp?
The mesiofacial cusp
Maxillary Second Molars: (Occlusal) List the order of cusp sizes from largest to smallest
Mesiolingual
Mesiofacial
Distofacial
Distolingual
Maxillary Third Molars: (Mesial) The crown to root ratio in length. Is this significant for molars?
Crown to Root ratio: 1:2
The root is only twice the length of the crown, which is short for molars
Maxillary Third Molars: (Occlusal) The four cusps in order from largest to smallest
Mesiofacial
Mesiolingual
Distofacial
Distolingual
Maxillary Second Molars: (Occlusal) The cusps of second molar from smallest to largest in size
Distolingual
Distofacial
Mesiofacial
Mesiolingual
Maxillary Third Molars: (Occlusal) What are the major pits of the third molars?
Central, Mesial and distal triangular
Maxillary Third Molars: (Occlusal) T or f, A definite lingual groove is evident and separates the mesiolingual and distolingual cusps
False, it is not evident that separates the mesiolingual and distolingual cusps
