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37 Cards in this Set
- Front
- Back
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Maxillary first molar:
# roots |
3 (1 lingual, 2 buccal)
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Maxillary first molar:
# cusps |
5 (2 buccal, 2 lingual), cusp of carabelli on mesiolingual cusp surface
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Maxillary first molar:
Which buccal cusp is larger? Which lingual cusp is larger? |
Mesiobuccal
Mesiolingual |
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Maxillary first molar:
Heights of contour/convexities, buccal vs. lingual |
Buccal - height of contour = lower 1/3, convex in lower 1/3 then straight up to cusp tip.
Lingual - height of contour = lower middle 1/3, convex throughout. |
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Maxillary first molar:
Mesial contour |
Flat-concave in lower 1/3, highly convex at height of contour
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Maxillary first molar:
Distal surface |
Convex throughout except concave/flat area immediately above distobuccal root
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Maxillary first molar:
Outline of crown |
Rhomboidal
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Maxillary first molar:
Ridges? |
Oblique ridge - links distobuccal and mesiolingual cusps
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Maxillary first molar:
Mesial marginal ridge vs. distal marginal ridge |
Mesial marginal ridge longer, more distinct than distal
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Maxillary first molar:
Grooves/pits |
Central groove/buccal groove/distal groove/distolingual groove -> lingual groove/distal pit/central pit/
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Maxillary first molar:
Which root is the largest? |
Lingual > mesiobuccal > distobuccal
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Maxillary first molar:
What does the root trunk connect? |
Buccal roots
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Maxillary first molar:
Developmental grooves/depressions |
Deep groove in root trunk
Vertical depression on lingual root |
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Maxillary first molar:
All roots can be seen from what angle? |
Buccal
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Maxillary first molar:
From the mesial, which roots can you see? |
Only mesiobuccal and lingual
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Maxillary first molar:
Root length: |
Buccal = 12
Lingual = 13 |
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Maxillary first molar:
Age of eruption |
6
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Maxillary first molar:
Mesiodistal measurement |
10
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Maxillary first molar:
Buccolingual diameter |
11
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Maxillary first molar:
Buccal height of contour Lingual height of contour |
B = cervical third
L = middle |
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Maxillary first molar:
# roots and location |
3 - 2 on buccal, 1 on lingual
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What is unique about the maxillary first molar (lingual convergence)
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Does NOT have lingual convergence
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Maxillary first molar:
3 identifying components |
1) Strong divergent roots
2) Short root trunk 3) Cusp of carabelli |
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How do you identify the mesial surface?
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Can only see mesiobuccal and lingual roots - can't see distal because the mesial root is so broad that it covers the distal. Can see the mesial root from the distal aspect.
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Maxillary first molar:
Dimension |
Largest of all three molars
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Maxillary first molar:
Distobuccal cusp height equals |
Mesiobuccal cusp height
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Maxillary first molar:
Contact heights |
Mesial - middle
Distal - middle third |
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Maxillary first molar:
What root is widest mesiodistally |
Lingual
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Maxillary first molar:
Crown form |
Square to rhomboid
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Maxillary first molar:
Crown length |
7.5
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Maxillary first molar:
Mesiodistal |
10
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Maxillary first molar:
Buccolingual |
11
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Maxillary first molar:
Age of eruption |
6
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Maxillary first molar:
Root completed |
9-10
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When viewed from the buccal aspect, the buccal groove on maxillary first molars runs in the occlusocervical direciton. The groove terminates in which location on the crown?
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One half the distance from its occlusal origin to the CEJ
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When viewed from the occlusal, which aspects are the widest?
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Mesial, lingual
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What groove is most prominent and where does it extend to?
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Lingual groove - runs from crown all the way down the root.
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