Term
| What are the functions of incisors? (4 of them) |
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Definition
-Cut food
-Articulate speech
-Support lips (esthetics)
-Guide mandible during movement |
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Term
Central vs Lateral:
-*1st evidence of calcification?
-Enamel completed?
-*Eruption?
-Root Completed? |
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Definition
-Calcification?
(C)- 3-4 months (L)- 1 year
-Enamel completed? Both 4-5 yrs
-Eruption?
(C)- 7-8 yrs (L)- 8-9 yrs
-Root completed? (C)- 10 yrs (L)- 11 yrs |
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Term
Maxillary Central Labial View
Shape?
Which outline more convex?
Where is height of contour M and D? |
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Definition
Shape- Trapezoidal
Outline- Distal more convex than mesial
*Mesial very straight (almost 90 degrees)
Height of Contour- Incisal 3rd on both sides (moreso on mesial) |
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Term
Mxaillary Central
-Newly erupted have how many mamelons?
-How many vertical depressions? |
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Definition
-3 mamelons and 2 shallow vertical depressions that fade out at the middle third
(mesiolabial and distolabial developmental depression) |
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Term
What are perikymata?
What are imbrication lines? |
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Definition
Perikymata- convexities/elevations- small wave-like ripples of enamel on newly erupted permanent teeth
Imbrication lines- depression/"grooves" |
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Term
Maxillary Central Lingual View
-Shape?
-M-D width compared to facial view? |
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Definition
-Trapezoidal
-M-D width of Li is more narrow than facial (can see best from incisal view) |
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Term
Maxillary Central Lingual View
-Mesial and Distal marginal ridges converge toward what?
-Lingual Fossa bound by what? |
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Definition
-Converge toward cingulum
-Li fossa bounded by 4 convexities |
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Term
Maxillary Central
-Describe root |
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Definition
-single root
-straight and tapered
-conical
-rounded at the apex |
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Term
Maxillary Central Root
-Shape of cross-section at CEJ?
-Shape of cross-section at mid-root?
-Length (in comparison to crown) |
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Definition
-CEJ shape- triangular
-Mid-root shape- ovoid
-length- 1.5X the crown |
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Term
Maxillary Central Mesial View
-Shape? Outline of lingual?
-CEJ curves toward what?
-Contact area? |
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Definition
-Triangular; outline of lingual is curved "S"
-CEJ curves toward incisal
-Contact area is incisal 1/3 and centered faciolingually |
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Term
Maxillary Central Distal View
-contact area?
-Crown length incisogingivally and labiolinugally compared to mesial? |
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Definition
-contact area more cervical than on mesial (but still in incisal 1/3)
-crown is shorter incisogingivally and smaller labiolingually than mesial view |
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Term
Maxillary Central Incisal View
-Shape?
-Cingulum offset to what side?
-On facial side, more convexity on which 1/3? |
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Definition
-Triangular
-Cingulum slightly offset to distal
-More convexity on distal 1/3 than mesial 1/3 |
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Term
Maxillary Lateral Labial View
-Where is height of contour?
-Which outline is more rounded, distal or mesial?
-Are incisal corners rounded or sharper than central incisors? |
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Definition
-Ht of contour- incisal 1/3
-Distal is more rounded
-incisal corners more rounded |
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Term
Maxillary Lateral Labial View
-Root/Crown proportion?
-Root curvature? |
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Definition
-longer proportionately to crown than the central incisor is
-Root curves to the distal |
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Term
Maxillary Lateral Lingual View
-What is the linguogingival fissure?
-Is there a lingual fossa? |
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Definition
-deep developmental groove which extends apically along the root
-yes, deeper and more defined (than central incisor) |
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Term
Maxillary Lateral Mesial View
-Root does what?
-Line through center of root bisects what?
-M or D, which view is widest labiolingually? |
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Definition
-Root tapers and has rounded apex
-bisects incisal edge
-Wider labiolingually in distal view |
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Term
Maxillary incisors (distinguishing)
-Which central incisor? (look at corners)
-Lateral incisors distinguishing feature (root)
-Central Vs Lateral |
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Definition
-CI- distal more convex than the mesial
-LI - root commonly curves distally
-C vs L- relative shape - C=square; L=rectangle
-root: L root is more slender and longer compared to crown |
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