Permanent Mandibular Incisors Flashcards
how does the mandibular central incisor compare to all other teeth with respect to its size?
it is the smallest of all the teeth
the crown of the mandibular central incisor has slightly ___ than half the mesiodistal diameter of the maxillary central incisor
more
the mandibular central incisor’s labiolingual dimension is __mm less than the maxillary central
1mm
masticatory stress on the mandibular central incisor is in a ___ direction and aids in ___
- labiolingual
- reinforcement
the mandibular central incisor’s root is narrow ___ and wide ___
- mesiodistal
- labiolingual
the mandibular central incisor’s root length is as great, if not longer, than the ____
maxillary central incisor
the incisal ridge of the mandibular central incisor is ___, and at ___ angles to the long axis of the root
- straight
- right angles
the mesial and distal outlines of the mandibular central incisor drop straight down to ___, and taper evenly to ___
- contact areas
- cervix
the mesial and distal outlines of the mandibular central incisor root are fairly ___ to apical areas, with a slight curve to ___
- straight
- distal
the labial face of the mandibular central incisor is ___, with flattened surface at ___ third, and the ___ 3rd is convex
- smooth
- incisal
- middle
the mandibular central incisor’s face at the cervix is more ___ along with the root
convex
from the lingual aspect, the mandibular central incisor’s ligual surface is ___, with a slight ___ at the incisal third
- smooth
- concavity
from the lingual aspect, the mandibular central incisor’s marginal ridges are almost ___, but are sometimes prominent near ___
- absent
- incisal
from the lingual aspect, the mandibular central incisor’s surface is flat, and progresses to ___ at the cervical third
convexity
from the lingual aspect, the mandibular central incisor shows ___ developmental grooves, along with the lateral
least
from the lingual aspect, the mandibular central incisor outlines are ___
symmetrical
from the mesial aspect, the mandibular central incisor’s labial face is straight above the ___
cervical curvature
from the mesial aspect, the mandibular central incisor’s lingual outline is ___ with labial inclination above the ___
- straight
- cingulum
from the mesial aspect, the mandibular central incisor is ___ at the middle third
concave
from the mesial aspect, the mandibular central incisor’s incisal ridge is either ___ or ___, and is lingual to the center of the ___
- round
- worn flat
- root
from the mesial aspect, the mandibular central incisor’s curvature of the cervical line is towards the ___, almost ___ the length of the crown
- incisal
- 1/3
from the mesial aspect, the mandibular central incisor’s root outline is ___ from cervix through middle third, then ___ rapidly
- straight
- tapers
from the mesial aspect, the mandibular central incisor’s root apex may be ___ or ___
blunt or pointed
from the mesial aspect, the mandibular central incisor’s mesial surface is ___, smooth at ___, tending to concavity at the ___
- convex
- incisal third
- cervix
from the mesial aspect, the mandibular central incisor’s mesial surface of the root is ___ below the cervical line
flat
from the mesial aspect, the mandibular central incisor will usually have a broad developmental depression along ___
most of the root
from the mesial aspect, the developmental depressions of mandibular central incisor roots are usually ___ at middle to apical thirds
deeper
from the distal aspect, the mandibular central incisor’s curvature of the cervical line is about 1mm ___ than the mesial
less
from the distal aspect, the mandibular central incisor’s distal surface of the crown and root are similar to ___
mesial
from the distal aspect, the mandibular central incisor’s developmental depression on the distal may be more marked, with ___ at its center
developmental groove
from the incisal aspect, the mandibular central incisor shows bilateral ___
symmetry
from the incisal aspect, the mandibular central incisor’s mesial half is almost ___ to distal half
identical
from the incisal aspect, the mandibular central incisor’s incisal edge is almost at ___ with labiolingual bisecting line
right angles
this is an important ID separating central and lateral
from the incisal aspect, the mandibular central incisor’s labiolingual dimension is always ___ than mesiodistal
greater
from the incisal aspect, the mandibular central incisor’s crown tapers to the ___, and the mesiodistal measurement is greater at the ___
- lingual
- labial
the labiolingual section of the pulp chamber of the mandibular central incisor shows ___ pulp horns, with a ___ pulp chamber that tapers toward the ___
- well developed
- large
- apex
the mesiodistal section of the pulp chamber of the mandibular central incisor shows a ___ cavity with ___ pulp horn (usually), and tapers to the ___
- narrow
- one
- apex
in the mandibular central incisor, the root section of the pulp chamber is often ___-like, and sometimes ___ canals may be present
- ribbon
- two
the mandibular lateral incisor resembles the central incisor, except it is somewhat ___ than the central
larger
the mesial side of the mandibular lateral incisor crown is usually ___ than the distal
longer
the incisal ridge of the mandibular lateral incisor slopes downward in a ___ direction
distal
the distal contact area of the mandibular lateral incisor is more in a ___ direction
cervical
this allows the lateral to contact the canine
the mandibular lateral incisor may have a deeper ___ above the cervical line on the ___
- concavity
- distal
the root of the mandibular lateral incisor is usually considerably ___ than the cetral
longer
the mandibular lateral incisor will have developmental depressions ___ and ___
mesially and distally
from the incisal aspect, the mandibular lateral incisor ridge is not at right angles to ___, as is the central
bisecting line
from the incisal aspect, the mandibular lateral incisor ridge or edge is curved to follow ___, giving the appearance of the crown being ___ on the root
- the curvature of the arch
- twisted
form and function of the pulp chamber of the mandibular lateral incisor is similar to ___
mandibular central incisor
