The document summarizes the key anatomical features of a maxillary lateral incisor tooth. It notes that the lateral incisor is smaller than the central incisor except for root length, and narrower from side to side. It then describes variations that can occur and provides details on features seen from the front, back, sides and biting surface of the tooth. These include shapes of ridges, angles, root curvature and positioning of contact points with neighboring teeth.

2. MAX. LATERAL INCISOR
-SMALLER IN DIMENSION THAN MAX. CENTRAL
EXCEPT ROOT LENGTH
-RELATIVELY NARROWER MESIODISTAL
DIMENSION THAN CENTRAL INCISOR
VARIATIONS:
• PEG-SHAPED LATERAL
• MISSING ENTIRELY
• LARGE POINTED TUBERCLE AS PART OF
CINGULUM
• DEEP DEVELOPMENTAL GROOVES
• TWISTED ROOTS
• DISTORTED CROWNS

3. LABIAL ASPECT
 Crown outline is trapezoidal
 Has more curvatures, with rounded incisal ridge and incisal angles
 More rounded mesioincisal angle
 Contact Areas:
 Mesial= incisal 3rd or near the junction of the middle and incisal 3rds
 Distal= junction of middle and incisal 3rd or center of the middle 3rd
 Distal outline of crown more rounded, more convex labial face
 Root is oftern about 1 ½ times the length of the crown
 Root tapers evenly from CEJ up to two thirds then curves sharply in a distal direction
 Ends in pointed apex

6. LINGUAL ASPECT
• CROWN IS TRAPEZOIDAL
• MARGINAL RIDGES ARE
MARKED
• LINGUOINCISAL RIDGE IS WELL-DEVELOPED
AND MORE
CONCAVE LINGUAL FOSSA

8. MESIAL ASPECT
• CROWN IS TRIANGULAR
• HEAVY DEVELOPMENT OF THE INCISAL
RIDGE, THUS IT APPEARS THICKER THAN
CENTRAL INCISOR
• ROOT APPEARS TAPERED CONE WITH A
BLUNTLY ROUNDED APEX
• ROOT AXIS LINE BISECTS THE INCISAL
RIDGE OF CROWN.

9. DISTAL ASPECT
• CROWN IS TRIANGULAR
• WIDTH OF CROWN APPEARS THICKER CEJ
CURVES LESS THAN MESIAL
• NOT UNCOMMON TO FIND A
DEVELOPMENTAL GROOVE EXTENDING ON
THE ROOT

10. INCISAL ASPECT
• RESEMBLES CENTRAL OR A SMALL CANINE
• CINGULUM AND INCISAL RIDGE MAY BE LARGER THAN CENTRAL
• LABIOLINGUAL MEASUREMENT MAYBE GREATER THAN MESIODISTAL DIMENSION
• EXHIBITS MORE CONVEXITY LABIALLY OR LINGUALLY THAN MAX. CENTRAL INCISOR
• INCISAL RIDGE HAS LINGUAL INCLINATION

14. END