300 Dental Anatomy Facts Flashcards
Primary teeth are MORE or LESS mineralized that permanent teeth?
Less
May appear more worn
What is the difference in space between the primary dentition and permanent dentition
2-4mm
Primary dentition is more square and squatty shaped
Mammelons that remain after age 10 indicate what?
An open bite
Typically the dention will fall into lateral excursion and wear off the mammelons by teeth occluding in a closed bite
When does calcification of primary dentition complete?
Age 3-4 years old
What is the order of eruption for primary dentition?
Centrals Laterals 1st molars Canines 2nd molars
Erruption:
Front to back besides canines
Manibulars before maxillarys except _____
Laterals
Maxillary PRIMATE space
Between the lateral and canine
Mandibular PRIMATE space
Between the canine and the 1st premolar (adults)
Between the canine and 1st molar (children)
What is the primate space?
Space created to accommodate the larger jaw and larger adult dentition
What is primary spacing?
And what is it caused by?
Spacing in the anterior teeth due to the growth of dental arches.
Making room for permanent dentition
NORMAL SPACING
Primary enamel rods are oriented in which direction in the cervical 1/3 of the crown?
OCCLUSALLY
Permanent enamel rods are oriented apically in the cervical 1/3
Primary molars roots differ from permanent molars roots because they are more _______
Divergent
Primary molars lack or have a small root _____
Trunk
The primary CENTRAL INCISOR has the smallest ___________ crown dimension
Faciolingual
The primary and permanent MANDIBULAR CENTRAL INCISOR
Most bilaterally symmetrical tooth
Delayed resorption of primary incisors the permanent incisors erupt ?
Lingually
“Shark teeth”
The primary central incisor exhibits a prominent lingual and facial _______ ________
Cervical ridge (bulge)
PRIMARY canine mesioincisal edge is ______ than the distoincisal edge
LONGER
The PRIMARY canine cusp tip is set off towards the _______
distal
Gives the longer mesioincisal edge
The 1st PRIMARY MAXILLARY MOLAR crown resembles what permanent tooth?
Maxillary premolars
The 1st PRIMARY MOLAR roots resembles what permanent tooth?
Maxillary molars
3 roots –> DB, MB, Palatal
** just more divergent**
The cervical ridge on the PRIMARY MAXILLARY 1st MOLAR is most prominent where?
Mesial Facial surface
It is NOT the most prominent cervical ridge
Which primary MAXILLARY tooth has the most prominent cervical ridge?
Where is it located?
Primary maxillary 1st molar
Located on the MF surface
Which tooth OVERALL has the most prominent cervical ridge?
MANDIBULAR first molar
located on the MF surface
Which primary tooth has an oblique ridge?
Primary 2nd MAXILLARY Molar – it is the only primary tooth
Which primary tooth has a DL groove, transverse ridge, and an oblique ridge?
Primary 2nd MAXILLARY molar
Which primary tooth exhibits a cusp of carabelli?
Primary 2nd MAXILLARY molar
What permanent tooth does the primary 2nd MAXILLARY molar resemble?
Permanent 1st MAXILLARY molar
What is the LAST tooth to erupt in the primary dentition?
Maxillary 2nd molar
Which primary maxillary molar has more cusps
Maxillary 2nd molar
1st molar – 3 cusps
2nd molar – 5 cusps
On the MANDIBULAR 1st molar the CEJ is most apically positioned on the ____ _____ surface
Mesial 1/3
Which primary tooth has the most prominent transverse ridge?
MANDIBULAR 1st molar
The primary mandibular 1st molar displays a ______ triangular fossa
Distal
Central fossa is usually displaced towards the distal
Central fossa = distal fossa = main fossa
Which primary tooth does NOT look like any permanent tooth?
Primary MANDIBULAR 1st MOLAR
Which primary teeth differ the most from permanent teeth?
Primary mandibular 1st molar
What is the highest and sharpest cusp on the primary mandibular 1st molar
Mesio-lingual cusp
Part of the prominent transverse ridge
What is the primary function of incisors?
Biting, Tearing
The maxillary central incisors have the larges ____________ axial incline
Facio-lingual
** Most tilted teeth**
Which tooth has the greatest cervical curvature?
Where is it located?
Maxillary central incisors
Located on the mesial
ALWAYS THINK OF MAXILLARY CENTRAL INCISOR – when asked about cervical curvature
.
The CEJ dips deeper (greatest cervical curvature) on Maxillary or Mandibular teeth?
Maxillary
The CEJ dips deeper (greatest cervical curvature) on Anteriors or posteriors?
Anteriors
The CEJ dips deeper on mesial or distal?
mesial
What tooth has the GREATEST CEJ dip?
Maxillary central incisor
Which ANTERIOR tooth is wider M-D than F-L
Maxillary central incisor
Which ANTERIOR tooth has the greatest MD crown dimension?
Maxillary central incisor
Maxillary central has the same measurements of what surfaces?
M-D
Occlusally- Incisally
** like a square**
The contact between the maxillary central incisor and lateral incisor make the facial embrasure ________ than the lingual embrasure
Smaller
The contact is more facially
The incisal embrasure is ______ between the maxillary central incisors compared to the mx central and lateral
Smaller
Maxillary LATERAL has the _______ crown variations
Most
What two teeth exhibit the most deviation in crown morphology? What what exhibits the most?
3rd Molars (most) MAXILLARY lateral incisors
The _______ _______ incisor is most often in abnormal relation and contact with adjacent teeth
MAXILLARY lateral
What two teeth are most often congenitally missing? Which one is the most?
3rd molars (most) MAXILLARY lateral incisor
The non molar tooth that is most likely to have a distal and mesial pulp horn is _______ _______ ______
Maxillary central incisor
The non molar tooth that is least likely to have a bifurcated root is ________ _________ _________
Maxillary central incisor
Which tooth has a DL groove that is an anatomical feature and cuases difficulty during tooth planing?
Maxillary LATERAL incisor
Which toot is most likely to have lingual pit caries?
Maxillary lateral incisor
Due to DL groove
The distoincisal angle of the MAXILLARY LATERAL INCISOR has the ________ ________ of all maxillary teeth
Greatest convexity
Which tooth generally has the most prominent marginal ridges of all ANTERIOR teeth?
Maxillary lateral incisor
Which tooth has the largest (deepest and most distinct) lingual fossa of all ANTERIOR teeth?
Maxillary Lateral incisor
Due to the prominent marginal ridges
Which maxillary tooth has the SMALLEST mesio-distal crown width?
Maxillary LATERAL incisor
Which tooth has the same mesio-distal width as the facial-lingual width?
Maxillary LATERAL incisor
Closest of ALL anterior teeth
The mesio-distal width of the lateral incisor (maxillary) is smaller than the mesio-distal width of the maxillary central incisor.
TRUE
The maxillary lateral incisor’s distal contact is the most ______ contact of all incisors.
CERVICAL
The maxillary lateral incisor’s distal contact is centered both _______ ________ and ________ _______
Facial-lingually
Inciso-cervically
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
Which tooth may have a larger root length? Mx central vs Mx lateral?
Maxillary Lateral
May have the same rooth length or longer
Mandibular Centrals
- Cervical concavity is greater on the _____ surface?
Mesial surface
More shallow concavity on the distal surface
Mandibular centrals and laterals both have concave areas on the _______ and _______ surfaces of the root
Mesial
Distal
Two canals???
Which tooth has the SMALLEST crown dimensions?
Mandibular centrals
Which tooth has the sharpest mesial and distal tooth angles?
Mandibular centrals
Which tooth has the most symmetrical crown?
Mandibular centrals
Mandibular centrals have the SAME proximal contact levels on the medial and distal. Where is this contact point located?
Incisal 1/3
Same contact points at the incisocervical length
Which two teeth only occlude with ONE other tooth?
** MAXILLARY ** 3rd molar
Mandibular central incisor
What is the first SUCCEDANEOUS tooth to erupt?
Permanent MANDIBULAR central incisors
The permanent 1st molar is NOT succedaneous!!!!!
Buccal and lingual embrasures are the same size for the mandibular centrals?
True
Symmetrical tooth!
The crown of the mandibular lateral incisor tilts ______ in relation to the long axis of the tooth.
DISTALLY
May see a portion of the distal marginal ridge when looking at the tooth from the medial aspect.
“Twisted tooth”
The mesio-distal width is wider on the mandibular ________ incisor compared to mn ________ incisor
Lateral
Central
Opposite of maxillary incisors
Which ANTERIOR tooth has the greatest cervical prominence?
MAXILLARY canine
What tooth has the most vertical axis (straight line axis) when viewed from the proximal?
MAXILLARY canine
Which tooth has the GREATEST tooth length?
Maxillary canine
Which tooth has the LONGEST root?
Maxillary canine
Which ANTERIOR tooth has has the GREATEST facial lingual length?
Maxillary canine
When looking from the occlusal surface
maybe due to the largest cervical prominence for anterior teeth
Maxillary canine distal contact is located where?
The distal contact is CENTERED (IJ JM JM)
Which tooth has the potential of contacting anterior teeth as well as posterior teeth simultaneously?
Maxillary Canine
Inter cusps with the Mn Canine and Mn 1st premolar
Where is the Maxillary canine cusp tip located?
Centered or just facial of the long axis
If located more facially – more long aspect of the tooth is visible from the incisal view
Which lobe of the maxillary canine includes the cusp tip>
Middle facial lobe
So lingual is more visible from incisal view
???????
The maxillary canine as a distal bulge
T or F
True!
The mesial and distal are asymmetric
What is the crown shape of the maxillary canine when looking from the facial?
Pentagonal
Which tooth has the straightest MESIAL alignment from crown to root?
Mandibular canine
The mesial surface of the MANDIBULAR canine is almost _______ to the long axis of the tooth
parallel
Which tooth has the LONGEST CROWN dimension?
Mandibular canine
Longest tooth –>
Longest root –>
Longest crown –>
Mx canine
Mx canine
Mn canine
The mandibular canine has a ________ prominent cingulum than the maxillary canine
LESS
The mandibular canine is ______ mesiodistally than the maxillary canine
SMALLER
- Distal bulge on Maxillary canine (fatter)
- Straight mesial on Mandibular canine (skinnier)
Which ANTERIOR tooth most frequently has a bifurcated root?
Mandibular canine
What are the roots in a bifurcated mandibular canine?
Buccal (facial)
Lingual
Which mandibular tooth has the LONGEST root length?
Mandibular canine
Longest root –>
Longest mandibular root –>
Mx canine
Mn canine
In cross section of the ROOT of the mandibular canine is shaped like?
Irregular oval
Cross section of mandibular canine at CEJ
Ovoid
Wider mesio-distal at the labial surface
* squished on the lingual
Cervical cross section of the mandibular canine is FLATTENED in a _______ _______ direction (more apical)
mesio-distal
Contact areas of mandibular canine are located?
More incisally
Mn incisor contact is the in the apical 1/3 of each tooth (high contacts)
The mandibular canine has a continuous convex facial surface from incisal to apical end
True
Convexity when viewed from the proximal
The mandibular canine makes a _____ shaped from incisal tip to root tip
C
Mandibular canine incisal edge is located more ______ to the long axis
Lingual
Opposite of maxillary canine
Canines:
Incisal edge located more
* Lingual to long axis –>
* Labial to long axis –>
Mandibular canine
Maxillary canine
What tooth has most pronounced MESIAL developmental marginal groove?
Maxillary first premolar
What surface of the Maxillary first premolar has a concavity? Why is this important?
What is that concavity called?
Mesial surface (where the mesial developmental groove extends)
Difficult to adapt a tofflemier band
Mesial developmental depression
What shape is the MAXILLARY first premolar when a cross section is taken of the cervical region?
KIDNEY bean
Due to the mesial concavity
What shape is the pulp chamber floor of the MAXILLARY first premolar?
Kidney bean
What non molar tooth can have three roots?
Maxillary First premolar (6% can have three canals)
Most of the time it is bifurcated but can be trifurcated (bifurcated 70-80% of the time)
The facial cusp on a MAXILLARY first premolar is located more __________
Distally
Elongating the mesio-facial cusp ridge
** unique for permanent teeth
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
What two teeth have a longer mesio-facial cusp ridge?
Permanent Maxillary 1st premolar
PRIMARY maxillary canine
Which premolar has the STEEPEST cusp inclines?
Maxillary first premolar
The maxillary first and second premolar LINGUAL cusps are offset to the ______?
Mesial
- The facial cusp of the first premolar is offset to the distal *
