Permanent Maxillary Incisors Flashcards
the major function of maxillary incisors is to ___ and ___ food
cut and punch
do maxillary incisors have cusps?
no, just incisal ridges/edges
describe the incisal edge of maxillary incisors
- starts out as incisal ridge
- edge is formed after wear has occurred
- edge is flattened linguoincisally
- edge is found at the junction with the labial surface
how does the mesiodistal width of the maxillary central incisor compare to all other anterior teeth?
it is the widest
the maxillary central incisor’s labial surface is less ___ than the maxillary lateral or canine
convex
the maxillary central incisor has a ___ or ___ shaped appearance
rectangualr or squared
the maxillary central incisor’s mesial incisal angle is fairly ___, while the distal angle is fairly ___
- sharp
- rounded
where are mamelons found?
- on the incisal ridge of permanent incisors
- they are normally worn down to form an incisal edge
some maxillary central incisors will be fairly flat in ___ and ___ thirds
middle and incisal
from the lingual aspect, the maxillary central incisor is more ___ in appearance
irregular
from the lingual aspect, the maxillary central incisor’s largest part is ___
concave
from the lingual aspect, the maxillary central incisor has ___ and ___ marginal ridges
mesial and distal
from the lingual aspect, the maxillary central incisor has a ___-like look
scoop
from the labial aspect, the maxillary central incisor’s average length is ___mm from high point on cervix to incisal edge
10-11mm
from the labial aspect, the maxillary central incisor’s mesiodistal length is about ___mm from contact to contact
8-9mm
from the labial aspect, the maxillary central incisor’s mesial outline shows a slight ___, with the crest of curvature near the ____
- convexity
- mesioincisal angle
from the labial aspect, the maxillary central incisor’s distal outline is more ___, with the crest of curvature ___ toward ___
- convex
- higher
- cervical line
from the labial aspect, the maxillary central incisor’s incisal outline curves very slightly ___ towards the ___
- downward
- center
the maxillary central incisor’s root is ___ shaped
cone
the apex of the root of the maxillary central incisor is ___
blunt
the root of the maxillary central incisor is usually 2-3mm ___ than the crown
longer
the bisecting line of the root of the maxillary central incisor is through the ___, and the crown tends to parallel the ___
- root
- mesial
T or F:
from the lingual aspect, the maxillary central incisor is a reverse of the labial outline
true
from the lingual aspect, the maxillary central incisor has ___ and a definite concavity
convexities
from the lingual aspect, the maxillary central incisor has a ___ below the cervical line
cingulum
from the lingual aspect, the maxillary central incisor’s cingulum is confluent with the ___ and ___
mesial and distal marginal ridges
from the lingual aspect, the maxillary central incisor has a ___ just below the cingulum
lingual fossa
from the lingual aspect, the maxillary central incisor’s borders are the ___, ___, and ___
- incisal ridge
- marginal ridges
- cingulum
from the lingual aspect, the maxillary central incisor may have developmental grooves from the ___ to the ___
cingulum to the fossa
from the lingual aspect, the maxillary central incisor’s crown and root taper ___, so the ___ portion is narrower
- lingually
- lingual
from the mesial aspect, the maxillary central incisor is ___ shaped with the base at the ___
- triangular
- cervix
from the lingual aspect, the maxillary central incisor’s bisecting line will go through the ___ and ___
apex and incisal ridge
from the lingual aspect, the maxillary central incisor’s crests of curvature are just below the ___
cervical lines
from the lingual aspect of the maxillary central incisor, a line lingual to the ___ is rarely seen
incisal ridge
from the lingual aspect, the maxillary central incisor will have a ___ just below the cingulum
concavity
from the lingual aspect, the maxillary central incisor’s curvature of the cervical line is ___ on the mesial surface than the distal
greater
from the distal aspect of the maxillary central incisor, more of the ___ surface is seen due to a slight curvature of the ___ surface
- labial
- labial
from the distal aspect, the maxillary central incisor’s labial curvature helps adapt to the curvature of the ___
dental arch
from the distal aspect of the maxillary central incisor, the curvature of the cervical line is ___ than on the mesial
less
from the incisal aspect of the maxillary central incisor, the cervical portion of the labial surface is a broad ___
convexity
from the incisal aspect, the maxillary central incisor’s incisal ridge is ___
clear
from the incisal aspect, the maxillary central incisor’s edge generally slopes to the ___
lingual
from the incisal aspect, the maxillary central incisor’s outline of the lingual portion tapers ___ toward the ___
- lingually
- cingulum
from the incisal aspect, the maxillary central incisor’s mesiolabial and distolabial line angles are ___ and ___ than the lingual
prominent and wider
from the incisal aspect of the maxillary central incisor, more ___ is seen from this view
bulk
from the incisal aspect, the maxillary central incisor’s labiolingual measurement is only ___ as great as the mesiodistal
2/3
from the incisal aspect, the maxillary central incisor’s crown has a ___ shape
triangular
from the labiolingual section of the maxillary central incisor pulp chamber, it is narrow in ___, widest in ___, and tapers gradually to apex
- incisal
- cervical
from the mesiodistal section of the maxillary central incisor pulp chamber, it is ___ than labiolingual and conforms to the general shape of the ___, with ___ in younger teeth that taper evenly to apex
- wider
- outer surface
- pulp horns
the maxillary central incisor pulp cavity is widest at the ___ area
cervical
T or F:
the maxillary lateral incisor may vary more than any other tooth with the exception of the 1st molar
false:
with the exception of the 3rd molar
describe 4 ways in which the maxillary lateral incisors will vary from other teeth
- peg shaped laterals are sometimes seen
- may be missing
- may have a palato-radicular groove
- may see a large pointed tubercle
from the labial aspect, the maxillary lateral incisor has ___ curvature than the central, with a ___ incisal ridge
- more
- rounded
from the labial aspect, the maxillary lateral incisor’s mesial outline resembles a central with more ___ at the angle
roundness
from the labial aspect, the maxillary lateral incisor’s mesial crest of contour is at the junction of the ___ and ___ thirds
middle and incisal
from the labial aspect, the maxillary lateral incisor’s distal outline is always ___ rounded
more
from the labial aspect, the maxillary lateral incisor’s crest of contour on the distal is at the center of the ___ third
middle
from the labial aspect, the maxillary lateral incisor’s labial surface is usually more ___ than the central, except with some ___ ones
- convex
- flat
from the labial aspect, the maxillary lateral incisor is usually about __mm narrower than the central
2mm
from the labial aspect, the maxillary lateral incisor’s root length is ___ in proportion to the crown than the central. it is ___x the length of the crown
- greater
- 1.5x
from the labial aspect, the maxillary lateral incisor’s root tapers to ___, curves to the ___, and ends in a sharper ___
- apex
- distal
- apex
from the lingual aspect, the maxillary lateral incisor’s mesial and distal marginal ridges are ___
marked
from the lingual aspect, the maxillary lateral incisor’s cingulum is prominent, with ___
deep developmental grooves
from the lingual aspect, the maxillary lateral incisor’s linguoincisal ridge is ___
well-developed
from the lingual aspect, the maxillary lateral incisor’s lingual fossa is more ___
concave
from the lingual aspect, the maxillary lateral incisor may have deep developmental groove at the side of the ___, mostly distal
cingulum
from the mesial aspect, the maxillary lateral incisor resembles a small ___; the crown is ___ and the root is ___
- central incisor
- shorter
- longer
from the mesial aspect, the maxillary lateral incisor appears thicker than the central due to heavy development of the ___
incisal ridge
from the distal aspect, the maxillary lateral incisor’s width of the crown appears ___ than the mesial
thicker
from the distal aspect, the maxillary lateral incisor’s curvature of the cervical line is ___ than mesial
less
from the distal aspect, the maxillary lateral incisor may have a ___ on the crown surface going onto the root
developmental groove
from the incisal aspect, the maxillary lateral incisor may resemble the ___ or it may look like a ___
- central
- canine
from the incisal aspect, the maxillary lateral incisor’s labiolingual dimension may be ___ than the mesiodistal dimension
greater
is the pulp chamber anatomy of the maxillary lateral incisor similar to the central incisor?
yes, only smaller
what are the dimensions of the maxillary central incisor?
CI length of crown
length of root
MD diameter of crown
MD diameter of crown @cervix
LL diameter of crown
LL diameber of crown @cervix
curvature or cervical line - M
curvature of cervical line - D
in mm
CI length of crown - 10.5
length of root - 13
MD diameter of crown - 8.5
MD diameter of crown @cervix - 7
LL diameter of crown - 7
LL diameber of crown @cervix - 6
curvature or cervical line - M - 3.5
curvature of cervical line - D - 2.5
what are the dimensions of the maxillary lateral incisor?
CI length of crown
length of root
MD diameter of crown
MD diameter of crown @cervix
LL diameter of crown
LL diameber of crown @cervix
curvature or cervical line - M
curvature of cervical line - D
in mm
CI length of crown - 9.5
length of root - 12.5
MD diameter of crown - 5
MD diameter of crown @cervix - 3.5
LL diameter of crown - 6
LL diameber of crown @cervix - 5.3
curvature or cervical line - M - 3
curvature of cervical line - D - 2
