Maxillary Lateral Incisors FINAL

8/6/2019 Maxillary Lateral Incisors FINAL

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Maxillary

Lateral

IncisorsMylaDiamansil

Da hne


2/22

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


3/22


4/22

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


5/22


Labial Aspect

CRO

WN

*Incisal Ridge

-rounded

*Developmental Grooves (2)

*Lobes (3)

Maxillary Right

Lateral Incisor

Maxillary Incisors


6/22


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


7/22


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


8/22


Labial AspectCRO

WN*Mesodistally

-Usually 2mm narrower

than the central incisor

Maxillary Right

Lateral Incisor

Maxillary Right

Central Incisor

-6.5mm- -8.5mm-


9/22


Labial AspectCRO

WN *Cervicoincisally-shorter (2-3mm) than

that of the Maxillary

Central Incisor

Maxillary Right

Lateral Incisor

Maxillary Right

Central Incisor

-9mm- -11mm-


10/22


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-


11/22


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


12/22

Maxillary Right

Lateral IncisorMaxillary Right

Central Incisor


Lingual AspectCRO

WNLingual anatomy similar to central but more pronounced


13/22


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


14/22


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


15/22


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


16/22


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


17/22


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


18/22


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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PULP

CAVITYMaxillary Central and Lateral Incisors:

Comparison of root and pulp features


20/22


21/22


PULP CAVITYPUL

P

Lateral: 1, 2, or 3 pulp horns

Central: 3 pulp horns

BOTH: One pulp canal

1 2 1 2 3


22/22

Than

kYou!

Documents

Maxillary Lateral Incisors FINAL