Midterm One: 300 Dental Anatomy Facts Minus Molars Flashcards
Primary teeth are (MORE OR LESS) mineralized than permanent teeth
Less
Difference in space from the primary to the permanent dentition is
2-4mm
Mamelons that remain beyond the age of 10 generally indicate an
open bite
Calcification of the primary roots is normally completed
3-4 years
The usual pattern of eruption for primary teeth is
Centrals Laterals 1st Molars Canines 2nd Molars
Front to back except _____; lowers before uppers except _____
canines, laterals
Primate space develops in the MX dentition between the
lateral and canine
Mandibular primary primate space is located between
Adult: canine and 1st premolar
Child: canine and 1st molar
Primary spacing for anterior teeth is most frequently caused by
growth of the dental arches
Direction of primary enamel rods in the cervical third is in _____ direction.
Permanent are in the _____ direction
occlusally
apically
Primary molars differ from permanent molars in that their roots are mo
divergent
Primary molar lacks an identifiable root
trunk
Primary mandibular central incisor has the smallest _______ crown dimension
Fa-Li
most bilaterally symmetrical tooth
Primary and permanent mandibular central incisor
In delayed resorption of primary incisors, the permanent incisors usually erupt ________
lingually “shark teeth”
Primary central incisor exhibits a prominent ______ ______ both on the facial and lingual surfaces
cervical ridge (buldge)
Primary canine longer incisal slope
mesio-incisal slope longer than disto-incisal
The cusp tip of the primary canine is generally off set to the
distal
MX first primary molar has a crown that somewhat resembles a
permanent premolar
MX 1st primary molar has roots that resembles a
permanent MX molar
Most prominent cervical ridge for primary MX teeth
on the MF surface of the 1st molar
Last primary teeth to erupt is the
MX 2nd molar
Which primary molar exhibits more cusps
primary 2nd molar (5)
vs. 3
Which primary tooth does not look like any permanent teeth
Primary 1st MN molar
Primary teeth that differ most from permanent teeth are the
MN 1st Molar
Incisors function
biting, tearing
tooth that has the greatest Fa-Li axial inclination
MX central
tooth with the greatest cervical curvature (on mesial) of any other tooth
MX central
CEJ dips deeper on MX central or lateral?
central
CEJ dips deeper on anterior or posterior?
anterior
CEJ dips deeper on MX or MD?
MX
CEJ dips deeper on mesial or distal?
mesial
GREATEST CEJ dip of all teeth
Mesial of the MX Central Incisor
Only anterior teeth that are wider mesio-distally than facio-lingually
MX Incisors
Greatest mesiodistal crown dimension of anterior tooth
MX Central Incisors
Tooth with identical measurements for incisol-cervical and mesio-distal
MX central
The contact between a MX central and lateral incisor makes embrasures - which is larger? Lingual or facial?
lingual embrasure larger than facial
which embrasure is smaller - the embrasure between the centrals or the embrasure between the central and lateral
between centrals
Tooth with most crown shape variation
MX lateral incisor
Which two teeth exhibit exhibits the most deviation in crown morphology
Third Molars
MX lateral incisors
Tooth most often is in abnormal relation and contact with adjacent teeth
MX lateral incisors
Two teeth most often congenitally missing
Third Molars
MX lateral incisors
non-molar tooth that most frequently has a mesial and distal pulp horn is the
MX central incisor
non-molar that is least likely to have a bifurcated root is the
MX central incisor
- The anterior tooth that most likely would demonstrate lingual pit caries is
MX lateral incisors
Tooth with a 54 has an anatomical feature, a DL groove that complicates root planning
MX lateral incisors
The disto-incisal angle of the _____ _______ has the greatest convexity of all MX anterior teeth
MX lateral
Teeth that generally have the most prominent marginal ridges of all anterior teeth
MX lateral incisors
Teeth that have the most distinct and deepest lingual fossa’s of all anterior teeth
MX lateral incisors
MX tooth that has the smallest mesio-distal crown width
MX lateral incisor
Tooth with mesio-distal measurement that is nearly identical to facio-lingual
MX lateral
Narrower mesio-distal width:
MX lateral incisor or MX central incisor
MX lat is narrower
Tooth that has distal contact that is farthest cervically of any incisor (usually very incisal)
MX lateral
Tooth that has distal contact centered both inciso-cervically and facio-lingually
MX lateral
Tooth root equal or larger than MX central
MX lateral
tooth distinguished by a greater cervical curvature on the mesial than distal
MN centrals
teeth that most frequently have concave areas on M & D root surfaces
MN centrals and laterals
smallest crown dimensions of any tooth
MN centrals
most symmetrical crown
MN centrals
has sharpest set of incisal angles (mesial and distal)
MN centrals
proximal contact at same level
MN centrals
teeth that have proximal contacts at approximately the same levels on mesial and distal
MN centrals
teeth that have contact points at the same inciso-cervical level
MN centrals
two teeth that generally occlude with only one opposing tooth
MN central incisors and MX third molars
The first succedaneous tooth to erupt in the mouth is the
permanent mandibular central incisor -
MN first molars arent considered succedaneous
B and L embrasures may be same size
MN centrals
incisor that tilts distally in relation to long axis (distolingual twist)
MN incisor
which MN incisor mesio-distal width wider?
MN laterals
tooth that has the greatest cervical prominence of any anterior tooth
MX canine
tooth that from a proximal view tends to be positioned with the most nearly vertical axis
MX canine
tooth that has the greatest overall total tooth length
MX canine
tooth that has the longest root of any other tooth
MX canine
tooth that has the greatest Fa-Li crown dimension of any anterior tooth
MX canine
tooth whose distal contact is centered
MX canine
the only tooth that has potential of contacting both anterior and posterior teeth
MX canine
tooth whose cusp tip located facial to lingual axis
MX canine
primary MX canine has cusp tip more towards the
distal
permanent MX canine cusp tip more towards
mesial
the middle facial lobe of the MX canine includes the cusp tip (opposite to MD canine)
-
has a distal bulge (mesial and distal are asymmetric)
MX canine
The crown form of _______ from a facial view is pentagonal
canines
tooth that has straightest mesial alignment of crown to root
MN canine
Mesial surface of the crown of the ____ _______ is almost parallel to the long axis
MN canine
has longest crown dimension of any other tooth
MN canine
which canine has the less prominent cingulum?
MN canine
canine that is narrower mesio-distally
MN canine
the anterior tooth that most frequently exhibits a bifurcated root
MN canine
Bifurcation for MN canine roots when present creates a _____ and _____ root
facial and lingual
has the longest root length of any MN tooth
MN canine
in cross section the root of the MN canine is
irregularly oval
cross section of the MN canine at the CEJ is
ovoid
in cervical cross section the root of the MN canine is _______ in a _____ _______direction
flattened in a mesio-distal direction
When compared to a MX canine the MN canine has contact areas located
more incisally
has a continuous convex facial surface from incisal to apical end
MN canine
makes a C shape from crown tip to root apex
MN canine
has incisal edge lingual to long axis (opposite to MX canine)
MN canine
has the most pronounced developmental Marginal groove of any MX tooth
MX 1st premolar
has a mesial concavity that makes is difficult to adapt a matrix band
MX 1st premolar
The cervical cross section of the MX 1st premolar exhibits a ______ ____ shaped root outline
kidney bean
The cervical cross section of the MX 1st premolar exhibits a ______ ____ shaped pulp chamber floor
kidney bean
The non-molar tooth that most frequently exhibits three roots is the
MX 1st premolar
The facial cusp of the __ ____ ______ is offset to the distal
MX 1st premolar
non molar tooth that has a longer mesio-facial cusp ridge than disto-facial cusp ridge
MX 1st premolar
Only premolar with longer mesial cusp ridges (so does primary MX canine)
MX 1st premolar
The premolar with the steepest cusp inclines
MX 1st premolar
MX tooth with lingual cusps are off set to the mesial (but buccal cusp is offset to the distal)
MX 1st premolar
is the posterior tooth that has the greatest cervico-occlusal crown height
MX 1st premolar
The non-molar teeth having the sharpest demarcation between pulp chamber & canal
MX 1st premolar
The size and position of the cusps are more identical for the ___ __ premolar than the _____
2nd MX premolar than the 1st
has two cusps that are of equal height
MX 2nd premolar
symmetrical posterior tooth (has to do with cusps)
MX 2nd premolar
2 cusps - one buccal one lingual
Instead of a long central groove with few supplemental grooves, it has a short central groove with a lot of supplemental grooves that make it look wrinkly
MX 2nd premolar
has fossa that are closest in size compared to any other posterior tooth
MX 2nd premolar
has a uniquely prominent triangular ridge
a. Snake eyes
b. No central groove
MN 1st premolar
has frequently both a separate mesial and distal pits (snake eyes)
a. Due to the triangular ridge
MN 1st premolar
The mesio-lingual developmental groove on tooth #21 originates from
the occlusal pit
The mesio-lingual developmental groove on tooth #21 extends onto the
proximal surface
only tooth with a mesio-lingual groove
MN 1st premolar
Mesiolingual developmental groove makes mesial marginal ridge run at a
(more of the occlusal surface can be seen from the mesial than distal
45 degree angle
tooth that has the mesial marginal ridge located more cervical than the distal
MN 1st premolar
The occlusal outline for the mandibular 1st premolar occlusal view is ____ _____
diamond shaped
In the rare event of a second canal for a MN 1st premolar it is most likely located to the
lingual
is the only premolar that frequently only has one pulp horn
MN 1st premolar
The lingual cusp of the __ _____ ________ is approximately 2/3 of the height of the facial cusp
MN 1st premolar
The lingual cusp of a __ _____ ________ is similar in development to the cingulum of a canine
MN 1st premolar
The lingual cusp of the __ _____ ________ in normal occlusion does not occlude
MN 1st premolar
most variation of all posterior teeth in facial versus lingual cusp height
MN 1st premolar
- The facial masticatory mucosa (attached gingival) is narrowest on the facial aspects of ___ _____
MN premolars
FL’lly smallest of any posterior tooth
MN 1st premolar
closest of all MN teeth in FL versus MD diameter
MN 1st premolar
Viewed from the occlusal the basic coronal outline of a MN second premolar is
pentagonal
Occlusal table of MN second premolar
rectangle
Premolar that is most likely to have a crescent-shaped central developmental groove is
MN 2nd premolar
Shortest interdental papilla is between the
MN 2nd premolar and 1st molar
The Y type MN 2nd premolar has ___ facial and ___ lingual cusps
one facial and two lingual cusps
The Y type MN 2nd premolar has the same number of occlusal pits as the MN ___ _____
1st molar
only premolar with multiple lingual cusps
MN 2nd premolar
only premolar with a lingual groove
MN 2nd premolar
only premolar with a central fossa
MN 2nd premolar
The premolar that most frequently has a single central pit is the
MN 2nd premolar
Most congenitally missing premolar
MN 2nd premolar
Longest tooth –>
Longest root –>
Longest crown –>
Mx canine
Mx canine
Mn canine
Longest root –>
Longest mandibular root –>
Mx Canine
Mn Canine
The PRIMARY canine cusp tip is set off towards the
Distal
Gives the longer mesioincisal edge
What is the order for PERMANENT maxillary teeth cusp ridge lengths starting with the mesial Canine and ending with the distal of second premolar?
Short -> Long -> Long -> Short -> Short-> Long
The mandibular canine is ______ mesiodistally than the maxillary canine
SMALLER
- Distal bulge on Maxillary canine (fatter)
- Straight mesial on Mandibular canine (skinnier)
PNEUMONIC for maxillary anterior Contacts
IJ
JM
JM
I Just
Jacked Micheal
Jackson’s Moped
I- incisal 1/3
J - junctional (between incisal 1/3 and middle 1/3)
M - middle 1/3
