Topic covered in this presentation: Introduction TOOTH NUMBERING CHRONOLOGY DIMENSIONS LABIAL ASPECTS LINGUAL ASPECTS MESIAL ASPECTS DISTAL ASPECTS INCISAL ASPECTS SUMMARY

2. INTRODUCTION
Two in number
Mesial side: Maxillary Central Incisor
Distal side: Maxillary Canines
FUNCTIONS
Shearing and Cutting food
Speech and Support for lips
Supplements Central Incisor in function and are
anatomically similar

3. CHRONOLOGY
• First evidence of calcification : 10-12 months
• Enamel completed : 4-5 years
• Eruption : 8-9 years
• Root completed : 11 years

4. In mm
Cervico Incisal length of Crown 9.0
Length of root 13.0
Mesiodistal diameter of crown 6.5
Mesiodistal diameter of crown at cervix 5.0
Labio or buccolingual diameter of crown 6.0
Labio or buccolingual diameter of crown 5.0
Curvature of cervical line - Mesial 3.0
Curvature of cervical line - Distal 2.0

6. Mesio-incisal and disto-incisal line angles are
more rounded than Max. Central Incisor.
Incisal outline is similar to max. CI but not straight
Crest of curvature (labial aspect) : cervical 3rd

11. CROWN
LABIAL ASPECTS
Mesiodistally
Mesioincisal angle
Distoincisal angle
Mesial profile
Distal profile
Mesial contact
Distal contact
Labial surface
Narrow
Slightly rounded
Distinctly rounded
Slightly rounded
Highly rounded
Junction of incisal and
middle third
Middle third
Rounded

12. LINGUAL ASPECTS
Marginal ridges and
cingulum
Lingual fossa
More prominent
MESIAL ASPECTS
CEJ
Contact area
Cingulum
Convex
INCISAL ASPECTS
Outline
Labial surface
Lobes
Mesio and distolabial angles
Ovoid
Highly convex
Slightly visible to absent
Rounded

13. THANK YOU