Maxillary Central Incisor Arch Traits Flashcards
width of max. incisor compared to mandible incisors
width is greater than mandible incisors
what features are prominent?
marginal ridges, cingulum, and lingual pit
Root dimensions?
equal
when viewed incisally what surface is more rounded
labial surface
Crown is wider in what directions?
mesial-lingually more than lingual-facially
When do max. central incisors erupt?
7-8 years
Max. central incisors root completion is done by what age?
10 years old
widest part of central incisor?
mesial-distal
widest dimension of any incisor
Mesial-Incisal angle shape
at a right angle
Distal-Incisal angle shape
slightly rounded
Mesial outline (height of contour) from Labial View
contact close to incisal
Distal outline (height of contour) from Labial View
more convex
contact at junction of incisal and middle 1/3
what may be found on facial surface of the tooth?
developmental grooves
Where do imbrication lines occur and what do they look like?
faint elevated lines that happen at the cervical 1/3 and parallel to CEJ
how many roots?
one
Crown profile from Lingual View
converges toward lingual
what does the incisal edge do with age?
slopes with age
Marginal ridges from the lingual view are parallel to what?
long axis of the tooth
CEJ shape from Lingual View
heavy curve to it
CEJ shape from Mesial View
steep
What lines up with the long axis from the mesial view
incisor edge lines up
also called axial loading
Crests of Curvature (height of contour) from mesial view
Both aspects are in the cervical 1/3
All Anterior teeth have facial and lingual heights of contour where?
in the cervical 1/3
In the distal view of the max. C. Incisor what is the only difference?
the CEJ is not as strong of a curve because the distal contact is positioned more cervically and size is more broad
from the incisal view, what is more visible: facial or lingual?
facial>lingual
from incisal view, which outline is greater? DL or ML?
ML>DL
from incisal view, cingulum is placed where to midline?
distal
what is very prominent from the incisal view
mesial marginal and distal marginal ridge
what are the maxillary centrals also called?
the age tooth
