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134 Cards in this Set

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Incisiors function
The incisors are shearing or cutting teeth.
most prominent teeth in the mouth
maxillary central incisors
vary in form more than any other tooth in the mouth except the third molar
Maxillary lateral incisors
o The lateral maxillary incisor is smaller than the central maxillary incisor in all dimensions, except
root length
widest mesiodistally of any of the anterior teeth
• The maxillary central incisor
labial curvature of crown face of max central incisor compaired to others
• The labial face of the central incisor is less convex than the maxillary lateral incisor or canine, which gives the central incisor a rectangular appearance
sides of max central incisor
mesial straight with root and distal is more curved
Mesial and distal incisal angles of max central incisor
o The mesial incisal angle is relatively sharp, the distal incisal angle rounded.
Bisecting line of maxillary central and lateral incisors
 The incisal ridge of the crown is therefore on a line with the center of the root
lingual lobe of anterior teeth
• Cingulum
bulk of the cervical third of the lingual surface of anterior teeth
Cingulum
mound or elevation on the crown of a tooth forming a divisional portion of the occlusal surface
 Cusp
Max Central incisor-• Between the marginal ridges, below the cingulum, a shallow concavity is present called the ?
lingual fossa
Lingual Aspect of Maxillary Central Incisors: extend from the cingulum inso the lingual fossa
developmental groves
Lingual Aspect of Maxillary Central Incisors: • The crown and root taper
lingually
Mesial Aspect of Maxillary Central Incisors
Mesial Aspect of Maxillary Central Incisors • The cervical line outlining the cementoenamel junction curves which way
) mesially on the maxillary central incisor curves incisally to a noticeable degree more so than on the distal
the incisal curve of the CEJ is greater on which side on most teeth, mesial or distal
mesial
max central incisor shape of root apex
blunt
peg-shaped laterals
maxillary lateral incisors with a nondescript, pointed form
Labial Aspect of Maxillary Lateral Incisors: • Labial aspect of maxillary lateral incisor resembles the central incisor except that it
has more curvature, incisal ridge is rounded and rounded inicisal angles mesially and distally
Labial Aspect of Maxillary Lateral Incisors: size compaired to central
2mm smaller
Labial Aspect of Maxillary Lateral Incisors: root to crown ratio
longer root to crown ratio. About 1.5
Lingual Aspect of Maxillary Lateral Incisors: cingulum
not prominent
Lingual Aspect of Maxillary Lateral Incisors: develepmental grooves
a deep developmental groove at the side of the cingulum, usually on the distal side, which may extend up on the roof for part or all of its length
Lingual Aspect of Maxillary Lateral Incisors: bisecting line
go through incisal edge and root apex
Lingual Aspect of Maxillary Lateral Incisors: lingual fossa
more concave and circumscribed that that found on the central incisor
Mesial Aspect of Maxillary Lateral Incisors: cervical line height compaired to distal
very steep, 1mm taller
Mesial Aspect of Maxillary Lateral Incisors:
Mesial Aspect of Maxillary Lateral Incisors:
Mesial Aspect of Maxillary Lateral Incisors:
mandibular incisors - mesiodistal dimensions
smaller than any other teeth
central or lateral mandib incisor larger?
• The (mandibular) central incisor is somewhat smaller than the (mandibular) lateral incisor, which is the reverse of the situation of the situation on the maxilla.
smallest tooth in the dental arches
• Mandibular central incisor
mandib central incisor vs. max in root length
same if not longer
Labial Aspect of Mandibular Central Incisor apical third of root
tilt to the distal
• The labial face of the mandibular central incisor crown
normally smooth, with a flattened surface at the incisal third; the middle third is more convex, narrowing down to the convexity of the root at the cervical portion
central incisors and developmental lines
rarely seen
MANDIBULAR CENTRAL INCISOR: Facial - The incisal outline
straight and perpendicular to the long axis
MANDIBULAR CENTRAL INCISOR: Facial - mesial and distal incisal angles
almost 90o
MANDIBULAR CENTRAL INCISOR: Facial - mesial and distal heights of contour
"near the incisal angle in the incisal 1/3 (highest
MANDIBULAR CENTRAL INCISOR: Facial - Crown tapers
gently to the cervical
MANDIBULAR CENTRAL INCISOR: Facial - convexity
1/3 of the crown is convex, while the remaining 2/3 is relatively flat
MANDIBULAR CENTRAL INCISOR: Facial - Root tapers
evenly to a sharp apex
MANDIBULAR CENTRAL INCISOR: Facial - root length vs max
"Root length is almost as long as the maxillary incisors, but it is still the shortest root in the
MANDIBULAR CENTRAL INCISOR: LINGUAL - come together forming a shallow lingual fossa
The cingulum, MMR, DMR, and incisal ridge
MANDIBULAR CENTRAL INCISOR: LINGUAL - The cingulum location
centered and is the center of calcification for the 4th lobe
MANDIBULAR CENTRAL INCISOR: LINGUAL - The tooth tapers to the
lingual
MANDIBULAR CENTRAL INCISOR: MESIAL - Wider __ than __
Wider F/L than M/D
MANDIBULAR CENTRAL INCISOR: MESIAL - The facial surface shape
"is flat and forms a straight line from the height of contour to the incisal
MANDIBULAR CENTRAL INCISOR: MESIAL - Facial and lingual height of contour is in the
cervical 1/3 and, as usual, is .5 mm
MANDIBULAR CENTRAL INCISOR: MESIAL - The incisal edge location F/L
"lingual to a bisector, allowing the tooth to sit behind the maxillary
MANDIBULAR CENTRAL INCISOR: MESIAL - CEJ is curved
more than any other mandibular tooth (as much as 1/3 of the crown)
MANDIBULAR CENTRAL INCISOR: MESIAL - Root maintains its width for
for 2/3 of the length and then tapers to a blunt apex.
MANDIBULAR CENTRAL INCISOR: MESIAL - Root morphology
Developmental depression in upper 2/3 of the root
MANDIBULAR CENTRAL INCISOR: INCISAL - incisal ridge F/L
lingual to the center, therefore more facial surface is visible
MANDIBULAR LATERAL INCISORS - variability
more variable than the central incisor
MANDIBULAR LATERAL INCISORS - size?
slightly larger than mandibular central in all dimensions due to the additional distal width
MANDIBULAR LATERAL INCISORS - symitry
not as symmetrical as the mandibular central incisor
MANDIBULAR LATERAL INCISORS - FACIAL - The incisal outline
slopes downward toward the distal
MANDIBULAR LATERAL INCISORS - FACIAL - Width M/D
"crown is wider M/D than the central by approximately 1 mm, and this additional width is
MANDIBULAR LATERAL INCISORS - FACIAL - facial convexity
cervical 1/3 or the crown is convex, and the remaining 2/3 is flat
MANDIBULAR LATERAL INCISORS - FACIAL -
MANDIBULAR LATERAL INCISORS - FACIAL - root size and orientation
larger and distially tillted at apex
MANDIBULAR LATERAL INCISORS - LINGUAL - anatomy
Anatomical features of the crown blend together to form a smooth surface
MANDIBULAR LATERAL INCISORS - LINGUAL - cingulum location
slightly distal
MANDIBULAR LATERAL INCISORS - LINGUAL - root taper
taper to lingual
MANDIBULAR LATERAL INCISORS - MESIAL - Facial and lingual heights of contour
cervical 1/3.
MANDIBULAR LATERAL INCISORS - MESIAL - The incisal ridge F/L
is lingual to a bisector
MANDIBULAR LATERAL INCISORS - MESIAL - Root F/L and anatomy
broad and parallel till apical 1/3 where converge there also developmental depression
MANDIBULAR LATERAL INCISORS - DISTAL - compaired to mesial
Crown appears thicker, because it is twisted on the root
MANDIBULAR LATERAL INCISORS - DISTAL - Between the contact and the CEJ
"there is a slight concavity that is more pronounced than on
MANDIBULAR LATERAL INCISORS - DISTAL - Root anatomy
developmental depression deeper on the mesial
MANDIBULAR LATERAL INCISORS - INCISAL - incisal ridge and F/L bisector
The incisal ridge is not perpendicular to a F/L bisector.
MANDIBULAR LATERAL INCISORS - FACIAL - Width M/D
"crown is wider M/D than the central by approximately 1 mm, b/c extra width on distal side
MANDIBULAR LATERAL INCISORS - DISTAL - Between the contact and the CEJ
"slight concavity more pronounced than on the central incisor.
#6 and #11
MAXILLARY CANINE
MAXILLARY CANINE - a protuberance located in the alveolar bone?
canine eminence
MAXILLARY CANINE - Superlatives
longest tooth, longest root, third longest crown behind max central and mandib canine
None
MAXILLARY CANINE - Conical shape makes it …
self clensing and rarely loose it
MAXILLARY CANINE- how many lobes
4
MAXILLARY CANINE - Canine is wider ___ than ___?
Canine is wider F/L than M/D
MAXILARY CANINE - Why most stable tooth in mouth
The thickness of the crown and root make it the most stable tooth in the mouth.
•MAXILARY CANINE - what better developed than on a central incisor
Cingulum
"MAXILARY CANINE - FACIAL - May have a slight (_______) below the CEJ on the mesial outline"
concavity
"#6 and #11 - FACIAL- In the middle of the crown, the mesial outline has a"
convexity
"#6 and #11 - FACIAL- Mesial height of contour"
middle and incisal 1/3
"#6 and #11 - FACIAL- The mesial cusp slope: is shorter/longer than the distal and is slightly what shape?"
shorter and concave
"#6 and #11 - FACIAL- Distal contact"
middle 1/3
- #6 and #11 - FACIAL - below the CEJ on the distal outline"
concavity
None
"#6 and #11 - FACIAL- which straighter m/d root outlineq"
mesial
"#6 and #11 - FACIAL- root slopes what direction"
distal
"#6 and #11 - FACIAL- M/D it thinnner than ?"
central incisor
#6 and #11 - LINGUAL - CEJ shape
almost flat
#6 and #11 - LINGUAL - Tapers to the _____ and has a well-developed _____
lingual and cingulum
#6 and #11 - LINGUAL - MMR, DMR, IR and LR form what?
two mesial and distal lingual fossa
#6 and #11 - LINGUAL - ___ tends to be heavier and more irregular
DMR
#6 and #11 - MESIAL - Widest ___ of all anterior teeth
F/L
None
#6 and #11 - MESIAL - The facial and lingual heights of contour
the cervical 1/3
#6 and #11 - MESIAL - labial crown surface shape
flat from the CEJ to the height of contour
#6 and #11 - MESIAL - on root
mesial developmental depression on the root that contributes to the tooth strength
#6 and #11 - MESIAL - cusp tip and bisecting line
A line bisecting the tooth passes lingual to the cusp tip/ cusp tip facial to center (this opposite on mandib canine)
None
#6 and #11 - MESIAL - root outline straightness
labial root outline is straighter than the lingual and more nearly parallel to a bisector
#6 and #11 - MESIAL - root apex
has a facial tilt
#6 and #11 - DISTAL - where two concavities
a concavity both above and below the distal contact
#6 and #11 - DISTAL - developmental root depression
developmental root depression is deeper than the mesial. (General rule
#6 and #11 - INCISAL - mesial outline shape
smooth semicircle
#6 and #11 - INCISAL - distal outline shape
has a hump
#6 and #11 - INCISAL -compare mesial side to distal side
mesial ½ of the crown is broader F/L; the distal ½ is wider M/D
#6 and #11 - INCISAL - line from mesial contact to distal contact
is a straight line through cusp tip
None
#6 and #11 - INCISAL - cingulum location
centered
#6 and #11 - INCISAL - will see more lingual or facial surface
lingual (opposite of mandib canine)
None
#6 and #11 - INCISAL - Root cross section shape
eliptical
#22 and #27 MANDIBULAR CANINE - SUPERLATIVES - crown, tooth and root length. Root incline. Anterior tooth most likely to have what?
1)Longest crown (root shorter than max canine), 2) second longest tooth to max canine, 3) ONLY tooth with root mesially inclined, 4) anterior tooth that MOST LIKELY to have root bifurcation
#22 and #27 MANDIBULAR CANINE - bigger ___ than ___
F/L than M/D (same as max)
#22 and #27 MANDIBULAR CANINE - how many lobes. How compared to max?
4 lobes; middle facial and lingual lobe are well developed, but not as much as the maxillary canine
#22 and #27 MANDIBULAR CANINE - Root apex has tendency to tilt to the ?
facial, which violates the general rule
#22 and #27 - FACIAL - Differences to MAX - 1)mesial outline . 2)apex 3)mesial and distal contacts. 4)Cusp slope length
1) From mesial height of contour to the root tip, the mesial outline is straight. 2) Root tapers to form a sharper apex then the maxillary canine. 3) The mesial and distal contacts are located more incisally. 4)Cusp slopes are shorter, because overall M/D length is shorter
#22 and #27 - FACIAL - Similarity to MAX - 1)Mesial Slope. 2)Cusp tip location. 3)Depressions.
1) Mesial slope is shorter than distal. 2) Cusp tip is centered over the root, but not on the crown. (it is mesial). 3) Slight depression on each side of the mid-facial lobe
#22 and #27 LINGUAL - Compared to MAX
Same features but flow together to make smother surface
#22 and #27 LINGUAL - Compared to MAX - Lingual taper
sharper lingual taper than max
#22 and #27 MESIAL - There is a _____ from cingulum to cusp tip
concavity
#22 and #27 MESIAL - From the cusp tip to the apex, the facial outline is
one smooth arch
#22 and #27 MESIAL - cusp tip thickness and sharpness
thinner and sharper than max
#22 and #27 MESIAL - The CEJ
has more curvature than the maxillary canine
#22 and #27 MESIAL - developmental depression on the root is? WRT maxillary
deeper than on the maxillary and may lead to the bifurcation of the root
None
#22 and #27 MESIAL - cusp tip wrt bisector
The cusp tip lies lingual to a bisector (opposite that of maxillary canine).
#22 and #27 MESIAL - cingulum development
poorly developed
#22 and #27 DISTAL - F/L thickness
appears thicker F/L, because the crown is twisted on the root
None
#22 and #27 DISTAL - CEJ
shorter than mesial
None
#22 and #27 DISTAL - Developmental depression
may not be as deep as the mesial, contrary to the general rule.
None
#22 and #27 INCISAL - The cusp tip location
mesial and lingual to the center of the crown - therefore more facial surface is visible (opposite of the maxillary canine).
None
#22 and #27 INCISAL - incisal ridge shape
This forms 2 arches on the incisal ridge, giving it a “gull wing” shape. A straight line can’t be drawn through the incisal ridge.
None
#22 and #27 INCISAL - cingulum
centered