Maxillary Incisors Flashcards
maxillary central incisors are used to
cut or incise food
shape of maxillary incisors
shovel
maxillary incisors are — teeth
succedaneous
maxillary teeth erupt at
7-8 years of age
the crown is — in outline
trapezoidal
the crown is – to – mm long (I-G) at the highest point on the CEJ to the incisal edge
10-11 mm
the crown is - to - mm wide (M-D) at the contact areas- points of greatest curvature
8-9 mm
is the anatomical crown longer or wider?
longer than it is wide
mesiodistal dimension at the CEJ is approximately - mm narrower
2 mm
6-7 mm
mesial outline of the tooth is relatively
straight or only slightly convex
hight of the convexity of the mesial surface is in the incised – of the tooth
1/3rd
height of convexity/contour is the point of greatest
convexity on a tooth surface
mesial contact area is in the incised – of the tooth
1/3rd
contact area
where the tooth touches another tooth
occurs at the mesial/distal height of contour
the distal outline is more — than the mesial outline
convex
height of contour or crest of the curvature on the distal is at the
junction of the middle and incised 1/3rds
the incisal outline is
straight
newly erupted teeth have
mamelons
mamelon
one of the 3 rounded protuberances found on the incisal edges of newly erupted incisors
-generally wear away with time to give a flat incisal edge
the mesioincisal angle is a
right angle
the distoincisal angle is more — than the mesioincisal angle
rounded
line angle
junction of two tooth surfaces
point angle
junction of three tooth surfaces
the vertical line or CEJ is curved toward the
root apex (apically)
labial developmental – and –
depressions and ridges
shape of the root
cone shaped, single root
the root is – mm long
13 mm (root is usually longer than the crown)
the apex of the root is slightly to the – of the long axis of the tooth
distal
long axis
a line extending through the center of an object lengthwise
shape of maxillary incisor form the lingual
trapezoidal
ridge
a linear elevation on the surface of a toot hand is named according to location
the lingual of the maxillary incisor has two ridges
media land distal marginal ridges
the lingual fossa is bounded by the
incisal edge, mesial and distal marginal ridges, and cingulum
cingulum
bulbous convexity on the cervical third of the lingual surface on an anterior tooth
pit
a small pinpoint depression in the depths of developmental processes
from the lingual aspect, the root is – shaped
cone
the root tapers toward the — slightly
distal
the crown and root are tapered to the
lingual
CEJ is curved — toward the root
convex
maxillary central incisor shape from the mesial aspect
triangular or wedge shaped
based in cervical area and apex at the incisal edge
the facial outline is
slightly curved
flat incisally
lingual outline is
concave-convex
the tooth is bisected
longitudinally
the incisal edge lies on the line
the incisal edge may be lingual to the line, but rarely facial to this line
the incisal surface slopes toward the
lingual
root is — shaped
cone
apex is
blunted