Mandibular Incisors Flashcards
Numbers assigned to mandibular central incisors
24, 25
Numbers of the Mandibular lateral incisors
23, 26
Where two adjacent teeth contact
Interproximal contact
Spaces/spillways that widen out from the contact
Embrasures
Anterior teeth have four embrasure spaces:
Incisal
Gingival (cervical)
Facial
Lingual
Which is larger in anterior teeth, the incisal or gingival embrasure:
Gingival
Which is larger in anterior teeth, the facial or lingual space:
They’re equal
Posterior teeth have four embrasure spaces:
Occlusal
Gingival (cervical)
Facial
Lingual
In posterior teeth, is the occlusal or gingival embrasure larger
Equal
Which is larger in posterior teeth, the facial or lingual embrasure
Lingual
Label the anterior embrasures
A- gingival (cervical)
B- incisal
C- facial
D- lingual
Label the posterior embrasures
A- occlusal
B- gingival (cervical)
C- facial
D- lingual
The Mandibular incisors are used to:
Cut/incise food
How many mandibular incisors are present:
4
Mandibular incisors have smaller ______ than any other tooth
Mesiodistal diameters
Mandibular central incisors are the:
Smallest tooth
In the mandibular arch, what is smaller- the central or lateral incisors
Central
Mandibular incisors are broader _____ than _____
Buccolingually (BL) than Mesiodistally (MD)
What is the outline of the mandibular central incisor
Trapexoisal
The mandibular central incisor tapers:
Cervically
Describe the incisal outline of the mandibular central incisor:
Straight
What is present on the mandibular central incisor when the tooth erupts
Mamelons
The crown is approximately two times as ____ as it is ____
Long IG as it is MD
From a facial view of a mandibular central incisor, the mesial and distal outlines are ______ and taper to the ____
Straight up to the contact areas & taper to the cervix
From a facial view of the mandibular central incisor, the mesioincisal & distoincisal line angles are:
Sharp 90 degree angles
The mandibular central incisor is often described as the:
Only symmetrical tooth in the mouth
From a facial view of the mandibular central incisor, the mesial & distal contact areas are in the:
Incisal 1/3
From a facial view of the mandibular central incisor, both contacts:
Are at the same level
In most teeth, the ____ contact is positioned more cervically than the _____ contact
(Even if its located in the same 1/3 or junction)
Distal
Mesial
From a facial view of the mandibular central incisor, describe the length of the crown relative to the root:
Crown is shorter than root
From a facial view of the mandibular central incisor, describe the labial surfaces:
Smooth, no developmental depressions
From a facial view of a mandibular central incisor, the labial surface is ____ in the ____ & becomes more ______
Flat in the incisal 1/3, more convex cervically
From a facial view of the mandibular central incisor, describe the # of roots
Single roto
From a facial view of a mandibular central incisor, describe the root:
Narrow MD & curves distally in some cases
From a lingual view of a mandibular central incisor, the crown is _____ in outline
Trapezoidal
From a lingual view of a mandibular central incisor, the crown root is smooth & rounded, slightly concave, but has no:
Distinct lingual fossa
From a lingual view of a mandibular central incisor, we can see ____ & only minor elevations
Mesial & distal marginal ridges
From a lingual view of a mandibular central incisor, describe the cingulum when compared to a maxillary incisor:
Much less distance than in the maxillary incisor
From a lingual view of a mandibular central incisor, is a developmental groove present?
No
From a mesial view of a mandibular central incisor:
The tooth is _____ in outline
Triangular
From a lingual view of a mandibular central incisor, the labial outline is:
Curved (convex)
From a lingual view of a mandibular central incisor, the height of contour of the labial surface is in the:
Cervical 1/3
From a mesial view of a mandibular central incisor, the incisal edge lies ______ to the line bisecting the root
Lingual
From a mesial view of a mandibular central incisor, when worn, the incisal edge angles to the:
Facial
Fron a mesial view of a mandibular central incisor, the CEJ curves ____ about 1 mm more than on the ____
Incisally
Distal
In a mandibular central incisor, the CEJ curves incisally about 1mm more on the ___ than it does on the ___
Mesial than is does on the distal
When the mandibular central incisor is worn, the incisal edge angles to the:
Facial
From a mesial view of the mandibular central incisor, the cervical line extends 1mm more apically on the ____ than ____
Lingual
Labial
When discussing the mandibular central incisor, the teeth are broader ____ than ____
Labiolingually than mesiodistally
From a mesial view of the mandibular central incisor, the crown have a concavity below ______ & above the _____
Middle 1/3
Cervical line
From a mesial view of the mandibular central incisor, the root extends straight from the CEJ & tapers _______ from the middle 1/3
Apically
From a mesial view of the mandibular central incisor, the root may have a broad ____ along its length
Developmental depression
From a distal view of the mandibular central incisor, compared to the mesial view, the cervical line curves incisally 1mm _____ than on the mesial
Less
From a distal view of the mandibular central incisor, the developmental depression on the distal of the root is _____ than on the mesial
Greater
From a incisal view of the mandibular central incisor, what is obvious about the tooth:
The symmetry
From a incisal view of the mandibular central incisor, the incisal edge is at _____ to a line bisecting the crown ____
Right angles
Labiolingually
From a incisal view of the mandibular central incisor, the incisal edge lies ____ to the center of the tooth
Lingual
From a incisal view of the mandibular central incisor, the tooth coverges:
Lignually
From a incisal view of the mandibular central incisor, the MD width of the _____ surface is wider than the MD width of the ____ surface
Labial
Lingual
From a incisal view of the mandibular central incisor, contact areas are centered _____
Faciolingually
Number of roots in a mandibular central incisor:
Single
In a mandibular central incisor, the root is broader ____ than ___
FL than MD
On the root of the mandibular central incisor, developmental depressions run longitudinally down root, on the ____ & ____
Mesial & distal
On the mesial & distal sides of the root of the mandibular central incisors, what are present
developmental depressions
On a mandibular central incisor the ___ depression on the root is usually deeper than the ____ depression on the root
Distal
Mesial
A cross section of the mandibular central incisors root reveals what shape & contains:
Round or ovoid
Depression on the mesial & distal
How pulp canals are present in the root of the mandibular central incisor:
Usually one
Describe the pulp canal MD and FL of the mandibular central incisor:
MD= narrow
FL= broad
Around 40% of the time in the mandibular central incisor, how many pulp canals are present?
Two
If two pulp canals are present in a mandibular central incisor, what are the names?
Facial & lingual canals
Label each view of the mandibular central incisor
Facial, lingual, incisal, mesial, distal
The mandibular lateral incisor resembles what tooth:
Mandibular central incisor
When compared to the mandibular central incisor, the mandibular lateral incisor is:
Larger
How is the mandibular lateral incisor larger than the central incisor?
Wider MD
Because the mandibular lateral incisor is wider MD than the mandibular central incisor, all the extra width appears to be added to the:
Distal aspect of tooth
Label the type of teeth
Left- mandibular lateral incisor
Right- mandibular central incisor
Label each view of the mandibular lateral incisor:
Facial, lingual, incisal, mesial, distal
From a facial view of the mandibular lateral incisor, the distal crown height is often ____ compared to the mesial crown height
Shorter
From a facial view of the mandibular lateral incisor, the incisal edge slopes:
Downward distally
From a facial view of the mandibular lateral incisor, the mesioincisal angle is:
A sharp 90 degrees
From a facial view of the mandibular lateral incisor, the distoincisal angle is:
Rounded
From a facial view of the mandibular lateral incisor, the lateral is wider ____ compared to the central incisor
MD
From a facial view of the mandibular lateral incisor, the mesial and distal contacts are in the:
Incisal 1/3
From a facial view of the mandibular lateral incisor, although both mesial & distal contacts are in the incisal 1/3, the distal contact is:
More cervical than mesial contact
From a lingual view of the mandibular lateral incisor, compare the lingual surface to the mandibular central incisor’s lingual surface
The same
In the mandibular lateral incisor, the mesial & distal views are:
Quite similar
The developmental depressions on the mesial & distal surfaces of the root in the mandibular lateral incisor are ______ than on the mandibular central incisor
More pronounced (deeper)
On the mandibular lateral incisor, compare the distal & mesial root depressions:
Distal root depression is more marked than on mesial
On the mandibular lateral incisor, the distal aspect is:
Twisted lingually
When the mandibular lateral incisor is viewed from the distal what cannot be seen?
Lingual surface (marginal ridge)
Label the following views of the mandibular lateral incisor:
Right- mesial
Left- distal
From an incisal view of the mandibular lateral incisor, the incisal edge is _____ to the center of the tooth
Lingual
From an incisal view of the mandibular lateral incisor, the tooth is not:
Symmetrical
From a incisal view of the mandibular lateral incisor, the tooth is not symmetrical- the distal part of the crown appears to be curved:
Lingually
From a incisal view of the mandibular lateral incisor- the _____ line angle is positioned more lingual
DF
The root & pulp of the mandibular lateral incisor is similar to the central incisor but:
Slightly larger
Describe the cross sectional root shape of the mandibular lateral incisor
Ovoid/round
When viewing the root of the mandibular lateral incisor, the depression on the distal is ____ than on the central incisor
Deeper
In the mandibular lateral incisor, typically how many pulp canals are present
One pulp canal
In 40% of cases _____ pulp canals are present in the mandibular lateral incisor
Two
Label the following views of the mandibular lateral incisor:
Facial, lingual, incisal, mesial, distal
