Permanent Anterior Teeth Anatomy Flashcards
Maxima central incisor numbers
8, 9
Mandible central incisor numbers
24, 25
Maxilla lateral incisor numbers
7, 10
Mandible lateral incisors numbers
23, 26
Functions of incisors
-cut food (mandibular incisors act like moving blades against maxillary incisors)
-speech (work in tandem with lips and tongue)
-esthetics(highest impact on appearance of smile, provide lip support)
When do anterior teeth show first evidence of calcification
Before age 1
Eruption sequence anterior teeth
Mandibular centrals, mandibular laterals, max centrals, max laterals, mand canines, max canines
Eruption age mandibular centrals
6-7 yo
Eruption age mandibular laterals
7-8 yo
Eruption age maxillary centrals
7-8 yo
Eruption age maxillary laterals
8-9 yo
Eruption age mandibular canines
9-10 yo
Eruption age maxillary canines
11-12 yo
Morphology of incisors
Cervical line, cingulum, mesial marginal ridge, distal marginal ridge, lingual fossa, incisal edge (labial and lingual), incisal ridge
How many developmental lobes on incisors ?
3 - mesial, middle, distal on facial
**usually two shallow vertical developmental depressions separating the lobes
4th can be the lingual lobe (forms cingulum)
Mammelons
3 rounded elevations on incisal edge
Goes away with age, present on newly erupted incisors
All incisor crowns have a relatively ______ incisal edge &the crowns are _________
Straight or slightly curved
Rectangular (longer incisogingivally than wide mesiodistally)
Incisor crown outlines are more _____ on the distal than mesial except for _______, which are symmetrical
Convex, mandibular central incisors
Incisor mesioincisal angles are more ____ than distoincisal edges except on the________ where there angles are not noticeably different
Acute (sharper), mandibular central incisors
Incisor crown contact areas on mesial surfaces are located in the _______
Incisal third
Distal contact areas on incisor crowns are more _____ than the mesial except on the distal of the __________
Why?
Cervical, mandibular central
On same level due to symmetry of mand central incisors
Incisor roots ___ from the cervical line to the apex
Taper (become more narrow)
On maxillary central incisors, the mesiodistally width of the root is _______ as the faciolingual thickness
Approx the same
most incisor roots
Are wider faciolingually than mesiodistally (flattened)