The Permanent Incisors
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36 terms
Terms | Definitions |
|---|---|
 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 3.eruption 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 Mesiodistal angulation | faciolingual angulation 28 degrees mesiodistal angulation 2 degrees |
| General outline/ shape from 1. proximal view 2. facial/lingual view 3. incisal view | 1. wedge 2.trapezoidal 3. triangular |
| cr top dimensions | 10.5 |
| root top dimension | 13 |
| M-D dimension top | 8.5 |
| m-d dimension top | 7 |
| L-L dimension top | 7 |
| l-l dimension top | 6 |
| m dimension top | 3.5 |
| d dimension top | 2.5 |
| cr dimension bottom | 9 |
| root dimension bottom | 13 |
| M-D dimension bottom | 6.5 |
| m-d dimension bottom | 5 |
| L-L dimension bottom | 6 |
| l-l dimension bottom | 5 |
| m dimension bottom | 3 |
| d dimension bottom | 2 |
| Maxillary incisor arch traits fossa crown labial surface | fossa deeper crown wider labial surface more convex |
| what is the functional form of the maxillary central incisor | wedge shape |
| how many mamelons are on the maxillary central incisor | 3 |
| how many lobes are on the maxillary central incisor | 4 |
| Hutchinson's Incisors | screwdriver shaped |
| labial profile curvature | hawk bill |
| when do the maxillary lateral incisors initiate calcification | 1 year |
| when do the lateral maxillary incisors complete enamel development | 4-5 years |
| when do lateral maxillary incisors erupt | 8-9 years |
| when is root development complete for maxillary lateral incisors | 11 years |
| maxillary lateral incisor characteristics number of roots number of lobes pulp horns number of cusps | 1 root 4 lobes 3 pulp horns 0 cusps |
| what tooth is most often missing congenitally | maxillary lateral incisor |
| variation rank for maxillary lateral incisor | 2nd.... behind 3rd molar |
| what is unique about the maxillary lateral incisor crown dimension | smallest of any maxillary tooth |
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