Maxillary Lateral Incisors FINAL
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Transcript of Maxillary Lateral Incisors FINAL
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8/6/2019 Maxillary Lateral Incisors FINAL
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Maxillary
Lateral
IncisorsMylaDiamansil
Da hne
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Permanent Maxillary
Lateral Incisors
Age of eruptio
n:
8-9 yearsHeight of contour:
Facial - Cervical third 1/2 mm
Lingual - Cervical third 1/2 mm
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PermanentMaLateral Incisors
Labial Aspect
CRO
WN-compared to Maxillary Central Incisors it is smaller in all dimensions-compared to Maxillary Central Incisors it is more convex
Maxillary central incisor bigger
and lateral incisor smaller
-Trapezoidal outline
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PermanentMaLateral Incisors
Labial Aspect
CRO
WN
*Incisal Ridge
-rounded
*Developmental Grooves (2)
*Lobes (3)
Maxillary Right
Lateral Incisor
Maxillary Incisors
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PermanentMaLateral Incisors
Labial AspectCRO
WN
*Mesial Outline
-more rounded mesioincisal angle
Maxillary RightLateral Incisor
Mesioincisal
angle
*Mesial Outline
-sometimes sharp
mesioincisal angle
Maxillary RightCentral Incisor
Mesioincisal
angle
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PermanentMaLateral Incisors
Labial AspectCRO
WN
*Distal outline
-more rounded
Maxillary RightLateral Incisor
Distoincisal
angle
*Mesial Outline-simicircular outline
from cervix to center
of incisal ridge
Maxillary RightCentral Incisor
Distoincisal
angle
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PermanentMaLateral Incisors
Labial AspectCRO
WN*Mesodistally
-Usually 2mm narrower
than the central incisor
Maxillary Right
Lateral Incisor
Maxillary Right
Central Incisor
-6.5mm- -8.5mm-
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PermanentMaLateral Incisors
Labial AspectCRO
WN *Cervicoincisally-shorter (2-3mm) than
that of the Maxillary
Central Incisor
Maxillary Right
Lateral Incisor
Maxillary Right
Central Incisor
-9mm- -11mm-
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PermanentMaLateral Incisors
Labial AspectROO
TMaxillary LeftLateral Incisor
Maxillary Left
Central Incisor -is as long or longer than
Maxillary Central Incisors
-greater in proportion to its
crown length
-11mm-
-13mm-
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PermanentMaLateral Incisors
Labial AspectROO
TMaxillary LeftLateral Incisor
-tapers evenly from cervical
line to
a point approximately 2/3 of
its length apically
- from the point, curves
sharply in distal direction
-end in a pointed apex
-some roots are straight
and curve mesially
Mesial Distal
Mesial MesialDistal Distal
Maxillary Left Lateral Incisor
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Maxillary Right
Lateral IncisorMaxillary Right
Central Incisor
PermanentMaLateral Incisors
Lingual AspectCRO
WNLingual anatomy similar to central but more pronounced
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PermanentMaLateral Incisors
Lingual AspectCRO
WNMaxillary Right Lateral Incisor
*Marginal ridge (mesial & distal)
*Cingulum
*Lingual fossa-more concave
*Linguoincisal ridge
- well developed
*Lingual pit
- frequent
*Developmental grooves- at sides(distal) of cingulum
may extend to the root
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PermanentMaLateral Incisors
Mesial AspectCRO
WNMaxillary Right Lateral Incisor
-Triangular profile
-Cingulum is convex with
remainder of tooth concave
on lingual surface
-Curvature of CEJ greater on
mesial than on distal
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PermanentMaLateral Incisors
Mesial Aspect
ROOTMaxillary Left Lateral Incisor
-longer than
Maxillary Central Incisors
-tapered cone
-bluntly rounded apical
end (sometimes pointed)
-lines drawn through center of
root bisects incisal ridge
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PermanentMaLateral Incisors
Distal AspectCRO
WNMaxillaryRight Lateral
Incisor
-Triangular profile
-width is thicker than mesial
*cervical line
-a millimetre or so less in
depth than mesial side
-developmental grooves are
sometimes seen on the distal
aspect extending to the root
Mesial Aspect
Distal Aspect
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PermanentMaLateral Incisors
Incisal AspectCRO
WNMaxillaryRight Lateral
Incisor
-resembles Central Incisors except in size
-more convex labially andlingually than Central Incisors
-resembles a small canine if:
a.)cingulum may be larger
than incisal ridge
b.)labiolingual dimension
is greater than mesiodistal dimension
Maxillary
Right Central
Incisor
D DMM
Maxillary Right Canine
M D
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PermanentMaLateral Incisors
VARIATIONS-Maxillary lateral incisors vary in form more than any othertooth in the mouth except third molar.Developmental anomaly
-too much variation
A. peg-shaped lateral
B. presence of palate gingival groove
-also called palatoradicular groove
C. large, pointed tubercle as part of the cingulum
D. twisted roots
E. distorted crowns
A.
B.
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PermanentMaLateral Incisors
PULP
CAVITYMaxillary Central and Lateral Incisors:
Comparison of root and pulp features
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PermanentMaLateral Incisors
PULP CAVITYPUL
P
Lateral: 1, 2, or 3 pulp horns
Central: 3 pulp horns
BOTH: One pulp canal
1 2 1 2 3
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Than
kYou!