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51 Cards in this Set
- Front
- Back
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Are of eruption of maxillary first premolars?
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10-12
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Maxillary First Premolar height of contour
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facial cervical 1/3
Lingual is in middle 1/3 |
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Shape of maxillary first premolars
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Trapezoidal outline
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1st tooth with occlusal surface
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Maxillary first premolar
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number of ridges per cusp tip
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4
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What ridge is more most prominant in maxillary premolars?
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Facial
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Difference in facial surface's mesial and distal cusp ridge
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Mesial cusp ridge is longer than the distal cusp ridge
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eight line angles of a posterior tooth
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mesiofacial
distofacial mesiolingual distolingual mesioocclusal disto occlusal facioocllusal linguooclusal |
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Proximal contacts of maxially premolars
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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 |
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Difference between lingual and facial cusp
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Lingual cusp is shorter than the facial cusp. Lingual cusp tip is displaced to the mesial.
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How does the maxillary premolar converge?
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It converges toward the lingual because the facial side is wider than the lingual side.
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Why is the facial cusp of a maxillary first premolar wider than the lingual cusp?
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Because it has a greater measurement in the mesiodistal direction
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When considering the size of the two cusps of the maxillary first premolar, which cusp in longer and wider?
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the facial cusp
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Where does the lingual ridge of the facial cusp run to?
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the tip of the cusp to the central area of the occlusal surface
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Describe maxillary premolars mesial marginal groove
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It extends on to the mesial surface, lingual to the contact are.
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Prominance of lingual surface
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Lingual ridge. It is ridge on lingual cusp the descends from lingual cusp to lingual surface.
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Which ridge of lingual cusp in a triangular ridge?
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Facial
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How many triangular ridges are found on a maxillary first premolar?
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2
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Where is broadest occlusal surface of maxillary first premolar?
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Broadest in facial lingual direction
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On occlusal surface of maxillary premolars where does the mesial and distal borders converge to?
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Toward lingual
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Describe tip of facial cusp of maxillary premolar
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It is located distally to axis of tooth
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On mesial and distal borders of maxillary premolar, which is concave?
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The mesial border is concave to match canine
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One major difference between the mesial and distal sufaces of the maxiallry first premolars is what?
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THe mesial marginal groove that extends from the occlusal surface on the mesial surface
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Where is concavity or maxially premolar?
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on mesial surface between the contact area and cervial line
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Name 3 characteristic features of the maxillary first premolar
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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 |
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Where are marginal grooves and triangular grooves found on maxillary premolars?
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at end of cetral developmental groove
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Where does mesial marginal groove usually cross?
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marginal ridge
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Where is pit formed on maxillary premolar?
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at confluence of grooves
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Age of eruption of maxillary second premolar
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10-12 years
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Maxillary second premolar height of contour
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Facial in cervial 1/3
Middle in middle 1/3 |
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Difference in 1st and 2nd maxillary premolar facial surface
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2nd maxillary premolar is more rounded at line angles, point angles, and cusp tips than 1st and facial cusp and cervical is less contoured
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Difference in cusps of 1st and 2nd maxillary premolars
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1st premolar has a longer facial cusp. 2nd premolar facial and lingual cusp are the same height.
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Differenc in 1st and 2nd molar lingual surface
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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
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Diffence in mesial and distal marginal ridges on 2nd maxillary premolar
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distal marginal ridge is more gingival than mesial marginal ridge
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Diffence in 1st and 2nd maxillary premolars marginal groove
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2nd maxialllary premolar marginal groove does not extent onto the mesial surface
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Difference in 1st and 2nd maxillary premolars msial surface
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1st premolar has marginal groove that is on mesial surface and a mesial concavity is present. The 2nd premolar has neither of these characteristics
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Maxillary second premolar occlusal table
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Rectangular or circular
mesial and distal profiles are parallel |
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The contact area on the distal surface of the maxillary second premolar is located
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cervical to the junction of the occlusal and miccle thirds
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Which of the following is most typical for all maxillary premolars?
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one or two root canals
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On the facial surface of the maxillary premolar, which of the following is most highly developed?
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central-facial lobe
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Which of the maxillary premolars show(s) the most distinct central groove?
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maxillary first premolar
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The pulp cavity form of a maxillary first premolar, as seen in a mesiodistal section,
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appears singularly pointed like a canine pulp cavity.
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Pits in the occlusal surfaces of the maxillary first premolar are at the junction of the:
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developmental grooves.
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Proximal contacts of the maxillary first premolar are found:
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in the middle third, slightly cervical to the junction of the middle and occlusal thirds
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The mesial and distal contacts of the maxillary second premolar are located:
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cervical to the junction of the occlusal and middle third.
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The junction of a facial triangular ridge and a lingual triangular ridge forms a:
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transverse ridge.
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The marginal ridges of premolars are found
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at the mesial and distal borders of the occlusal surface
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Of the permanent premolars, the most frequently bifurcated is the:
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maxillary first premolar.
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The maxillary first premolar has a mesial ridge of the facial cusp that is:
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longer than the distal cusp ridge.
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A single root canal occurs approximately what percentage of the time in the maxillary first and second premolars?
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Occurs 20% of the time in the first and 60% in the second
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The bottom of a long shaped depression between cusps or ridges, the inclines of which meet at an angle, is known as a:
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groove.
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