Maxillary lateral incisors Lab #6 105

Maxillary Lateral incisors #7 and #10

• 2nd from the midline

• mesial contacts with centrals

• distal contact with canines

• resembles maxillary central but smaller

• relatively narrower mesiodistally

• features, curvatures, concavities and convexities more prominent and more distinct then max. central

Initiation of calcification for Maxillary Lateral incisors #7 and #10

1 year

Eruption for Maxillary Lateral incisors #7 and #10

8-9 years

Completion of root for Maxillary Lateral incisors #7 and #10

11 years

Labial view for Maxillary Lateral incisors #7 and #10

mesial outline

• mesioincisal angle sharp

Distal outline

• more rounded than distal of central

• Distoincisal angle is more rounded

**helps distinguish right for left

incisal labial view of Maxillary Lateral incisors #7 and #10

may exhibit mamelons

more rounded incisal angles than a maxillary central

CEJ cervical margin labial view of Maxillary Lateral incisors #7 and #10

curves slightly toward the root

• less curvature than central

Labial view continued

Developmental depressions and imbrication lines sometimes present

Height of contour: cervical third

Lingual view of Maxillary Lateral incisors #7 and #10

Mesial outline

• similar to mesial outline of max, central

Distal outlines

• similar to max. central

• distoincisal angle much more rounded than mesioincisal angle

Incisal

• similar to labial

Cervical margin

• CEJ curves toward the apical

lingual cont

• Mesial and distal marginal ridges and cingulum are more prominent than central

• cingulum centered

• Lingual fossa deeper than central

• Lingual pit is more common than on centrals

• Pit is potential site for caries

linguogingival groove

• may originate near lingual pit

• extends cervically over the cingulum and may continue onto the root surface

Height of contour lingual view

at greatest curvature of cingulum in cervical third

Mesial surface of Maxillary Lateral incisors #7 and #10

• similar to max. central

• CEJ deeper on the mesial

Distal surface

CEJ is not as deep as the mesial

incisal aspect

• incisal ridge

• more convex labially and lingually than central

• outline appears rhomboidal

Root

• Single

• conical root

• root may curve towards distal

• sharp apex

Clinical considerations

variation in form may present challenges in instrumentation and assisting patient in maintaining good oral hygiene

Dilaceration: distorted sharp bend in root

Relatively more common in maxillary lateral incisors

Variations and anomalies

• Incisal portion of cingulum may exhibit a tubercle (accessory cusp) on the cingulum- Talon’s cusp

• Maxillary lateral incisors are among the permanent teeth most commonly affected by microdontia

Linguogingival groove

may accumulate deposits and may extend all the way onto root surface

Peg lateral

• Bilateral or unilateral

• relatively common

• Lack of development of mesial and distal portions of crown

Congenitally missing

tooth bud does not form

Dens in dente

more common affects maxillary lateral incisors