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Functions of central incisors (3)
mastication( incision), phonetics (th,f, v sounds), and esthetics (support profile of lips and face in addition to they size, shape, color and alignment)
Arch traits of maxillary central incisor (2)
1. widest of the incisor class- viewed labially or lingually
2. maxillary central in larger than lateral
Maxillary central incisor: Developmental data:
1. initiation of calcification
2. completion of enamel
4. completion of root
1. initiation of calcification 3-4 months
2. completion of enamel 4-5 years
3.eruption 7-8 years
4. completion of root 10 yrs.
Characteristics of maxillary central incisor- roots, lobes, pulp horns, cusps
1 root, 4 lobes, 3 pulp horns, 0 cusps
Maxillary central incisor: Orientation in arch:
faciolingual angulation 28 degrees
mesiodistal angulation 2 degrees
General outline/ shape from
1. proximal view
2. facial/lingual view
3. incisal view
Maxillary incisor arch traits
labial surface more convex
maxillary lateral incisor characteristics
number of roots
number of lobes
number of cusps
3 pulp horns
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