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51 Cards in this Set

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  • Back
Are of eruption of maxillary first premolars?
10-12
Maxillary First Premolar height of contour
facial cervical 1/3
Lingual is in middle 1/3
Shape of maxillary first premolars
Trapezoidal outline
1st tooth with occlusal surface
Maxillary first premolar
number of ridges per cusp tip
4
What ridge is more most prominant in maxillary premolars?
Facial
Difference in facial surface's mesial and distal cusp ridge
Mesial cusp ridge is longer than the distal cusp ridge
eight line angles of a posterior tooth
mesiofacial
distofacial
mesiolingual
distolingual
mesioocclusal
disto occlusal
facioocllusal
linguooclusal
Proximal contacts of maxially premolars
middle third of crown, slightly cervical to the junction of middle and occlusal third at marginal ridge

mesial is a tad more occlusal
distal is a tad more gingival
Difference between lingual and facial cusp
Lingual cusp is shorter than the facial cusp. Lingual cusp tip is displaced to the mesial.
How does the maxillary premolar converge?
It converges toward the lingual because the facial side is wider than the lingual side.
Why is the facial cusp of a maxillary first premolar wider than the lingual cusp?
Because it has a greater measurement in the mesiodistal direction
When considering the size of the two cusps of the maxillary first premolar, which cusp in longer and wider?
the facial cusp
Where does the lingual ridge of the facial cusp run to?
the tip of the cusp to the central area of the occlusal surface
Describe maxillary premolars mesial marginal groove
It extends on to the mesial surface, lingual to the contact are.
Prominance of lingual surface
Lingual ridge. It is ridge on lingual cusp the descends from lingual cusp to lingual surface.
Which ridge of lingual cusp in a triangular ridge?
Facial
How many triangular ridges are found on a maxillary first premolar?
2
Where is broadest occlusal surface of maxillary first premolar?
Broadest in facial lingual direction
On occlusal surface of maxillary premolars where does the mesial and distal borders converge to?
Toward lingual
Describe tip of facial cusp of maxillary premolar
It is located distally to axis of tooth
On mesial and distal borders of maxillary premolar, which is concave?
The mesial border is concave to match canine
One major difference between the mesial and distal sufaces of the maxiallry first premolars is what?
THe mesial marginal groove that extends from the occlusal surface on the mesial surface
Where is concavity or maxially premolar?
on mesial surface between the contact area and cervial line
Name 3 characteristic features of the maxillary first premolar
1. the extentsion of the mesial marginal grrove onto the mesial surface
2. the lingual cuspt is shorter than the facial cusp
3. there is a mesial concavity cervial to contact are
Where are marginal grooves and triangular grooves found on maxillary premolars?
at end of cetral developmental groove
Where does mesial marginal groove usually cross?
marginal ridge
Where is pit formed on maxillary premolar?
at confluence of grooves
Age of eruption of maxillary second premolar
10-12 years
Maxillary second premolar height of contour
Facial in cervial 1/3
Middle in middle 1/3
Difference in 1st and 2nd maxillary premolar facial surface
2nd maxillary premolar is more rounded at line angles, point angles, and cusp tips than 1st and facial cusp and cervical is less contoured
Difference in cusps of 1st and 2nd maxillary premolars
1st premolar has a longer facial cusp. 2nd premolar facial and lingual cusp are the same height.
Differenc in 1st and 2nd molar lingual surface
1st premolar has a longer facial cusp. 2nd premolar facial and lingual cusp are the same height. also on 1st polar lingual surface facial profile is visible, on 2nd premolar lingual side, facial profile is not visible
Diffence in mesial and distal marginal ridges on 2nd maxillary premolar
distal marginal ridge is more gingival than mesial marginal ridge
Diffence in 1st and 2nd maxillary premolars marginal groove
2nd maxialllary premolar marginal groove does not extent onto the mesial surface
Difference in 1st and 2nd maxillary premolars msial surface
1st premolar has marginal groove that is on mesial surface and a mesial concavity is present. The 2nd premolar has neither of these characteristics
Maxillary second premolar occlusal table
Rectangular or circular
mesial and distal profiles are parallel
The contact area on the distal surface of the maxillary second premolar is located
cervical to the junction of the occlusal and miccle thirds
Which of the following is most typical for all maxillary premolars?
one or two root canals
On the facial surface of the maxillary premolar, which of the following is most highly developed?
central-facial lobe
Which of the maxillary premolars show(s) the most distinct central groove?
maxillary first premolar
The pulp cavity form of a maxillary first premolar, as seen in a mesiodistal section,
appears singularly pointed like a canine pulp cavity.
Pits in the occlusal surfaces of the maxillary first premolar are at the junction of the:
developmental grooves.
Proximal contacts of the maxillary first premolar are found:
in the middle third, slightly cervical to the junction of the middle and occlusal thirds
The mesial and distal contacts of the maxillary second premolar are located:
cervical to the junction of the occlusal and middle third.
The junction of a facial triangular ridge and a lingual triangular ridge forms a:
transverse ridge.
The marginal ridges of premolars are found
at the mesial and distal borders of the occlusal surface
Of the permanent premolars, the most frequently bifurcated is the:
maxillary first premolar.
The maxillary first premolar has a mesial ridge of the facial cusp that is:
longer than the distal cusp ridge.
A single root canal occurs approximately what percentage of the time in the maxillary first and second premolars?
Occurs 20% of the time in the first and 60% in the second
The bottom of a long shaped depression between cusps or ridges, the inclines of which meet at an angle, is known as a:
groove.