Dental Anatomy Facts Part 1 Flashcards
Which are less mineralized and more worn
Primary or Permanent teeth
Primary
The difference in space from primary to permanent dentition in the arch
2-4 mm
Mamelons that remain beyond what age generally indicate what condition
beyond age 10 indicate an open bite
Calcification of primary roots is normally completed by what age
3-4 years of age
Usual pattern of eruption for primary teeth
additional notes
exception to rule
centrals, laterals, 1st molars, canines, 2nd molars
front to back except canine
Lowers before uppers except laterals
Primate space is where on maxillary primary dentition
between lateral and canine
Mandibular primary primate space
between canine and first molar
Spacing in primary anterior teeth is most frequently caused by
growth of dental arches
The direction of primary (deciduous) enamel rods in cervical third
occlusal direction
outer (or opposite) direction for permanent enamel rods
A main difference in primary molar roots from permanent
more divergent roots
What small or lacking in primary molars
a root trunk (CEJ to furcation)
Which tooth has smallest faciolingual crown dimension
Primary mandibular central incisor
Most bilaterally symmetrical tooth
both the primary and permanent mand central incisor
What results from delayed resorption of primary incisors
lingual eruption of permanent incisors
shark teeth
Cervical third of primary central incisors exhibit what
prominent cervical ridges facially and lingually
max central?
From a facial view, which slope on primary canine is longer
mesio-incisal slope is longer than the disto-incisal
Cusp tip of primary canine off set to which direction
distal
The maxillary 1st primary molar crown resembles what tooth
a permanent premolar
The maxillary 1st primary molar has roots that resemble which tooth
Permanent maxillary molar
Cervical ridge of max 1st primary molar most prominent where
Mesio-facial suface
Primary maxillary 2nd molar resembles which tooth
Permanent maxillary first molar
Primary maxillary 2nd molar is the only posterior primary tooth to have
Oblique ridge and
Transverse ridges and
Disto-lingual grooves
Cusp of carabelli in primary dentition found where
Primary maxillary 2nd molar
Last tooth to erupt in primary teeth
Maxillary primary 2nd molar
What primary tooth from maxilla has more cusps
2nd primary maxillary molar has more cusps than 1st maxillary molar
Which primary tooth has the most prominent cervical ridge
Primary mandibular first molar
Which portion of the tooth is the most prominent cervical ridge of primary teeth
Facial cervical ridge of primary mand. 1st molar
Facial view of primary mandibular 1st molar, the CEJ is most apical where
on mesial third
dips down apically here
What’s up with the fossa of primary mandibular 1st molar
Exhibits distal triangular fossa - central fossa displaced to distal
some call it distal or main fossa rather than central
Which tooth has most distinct transverse ridge
primary mandibular 1st molar
Which tooth does not look like any permanent tooth
primary 1st mandibular molar
Highest and sharpest cusp on primary mandibular first molar
Mesiolingual
not mesiobuccal
Teeth whose function is primarily for biting
Max central incisors
Tooth with greatest facio-lingual axial inclination
Max central incisors
Which tooth has the greatest cervical curvature of any other tooth
Max central incisor
The CEJ dips deeper on
Anterior teeth than posterior teeth
Max than Mand
Mesial side than distal
Greatest on mesial of Max central incisor
The only anterior teeth that are wider mesio-distally than facio-lingually
Max central incisors
Max central incisor has which dimension that is longer than any anterior tooth
Mesio-distal
Compare measurements of Inciso-cervical vs Mesio-distal dimensions of max central incisor
Nearly identical
Contact between max central and lateral incisors makes which embrasure larger
makes lingual embrasure larger than facial
typical of most teeth
Which incisal embrasure is larger
between max centrals or between central and lateral
central and lateral
which tooth has most crown shape variations
Max lateral
Which tooth exhibits most deviation in crown morphology
third molars
Except for third molars, which tooth exhibits the most deviation in crown morphology
Max lateral
Nature of Max lateral relation and contact with adjacent teeth
Most often in abnormal relation and contact with adjacent teeth
Most congenitally missing tooth
3rd molars
Other than 3rd molars, which tooth is most congenitally missing
Max lateral incisor
The non-molar tooth that most frequently has a mesial and distal pulp horn
Max central incisor
Non-molar tooth that is least likely to have a bifurcated root is
maxillary central incisor
The anterior tooth that most likely would demonstrate lingual pit caries
Max Lateral
What anatomical feature of Max lateral incisor complicates root planning
disto-lingual groove
Of all max anterior teeth, which incisal angle has the greatest convexity
max lateral disto-incisal angle
Where are the most prominent marginal ridges of all anterior teeth found
Max lateral
Which teeth have the most distinct and deepest lingual fossas of all anterior teeth
Max lateral
Which tooth has smallest mesio-distal crown width of any maxillary tooth
Max lateral
Which tooth has nearly identical dimensions mesio-distally and facio-lingually
Max lateral incisor
don’t confuse with max central that has identical inciso-cervical and mesio-distal dimensions
Furthest cervical contact of any incisor found where
Distal contact of max lateral incisor
Nature of distal contact of max lateral incisor
- furthest cervical contact of any incisor
- centered both inciso-cervically and facio-lingually
Compare root lengths of max central and laterals
Max lateral roots are equal to or longer than central root lengths
Which side of mand central incisors is the cervical curvature greater
greater on mesial than on distal
Anatomical feature of mand centrals and laterals root surfaces
mesial and distal concave areas
Smallest crown dimensions of any tooth
mand centrals
Most symmetrical crown
Mand. Central
Sharpest set of incisal angles (mesial and distal)
mand central
mnemonic for contacts of max anterior teeth, starting at central
IJ JM JM
I Just Jacked Michael Jackson’s Moped
I - incisal
J - junction of incisal and middle
M - middle
Nature of proximal contacts of mand centrals
- they are at the same level
- same level on mesial and distal
- same incisocervical level
What are the only maxillary teeth that occlude with only one opposing tooth
only mandibular teeth that occlude with only one tooth
Max third molars
Mand central incisors
First succedaneous tooth to erupt
permanent mandibular central incisor
remember - Permanent firs molar is not succedaneous
Size relation of buccal and lingual embrasures of mand central incisors
may bet the same
The crown of the mand lateral special feature
tilts distally in relation to long axis
On which tooth can you see the distal marginal ridge from a mesial view
mand lateral
because of the distal tilt of its crown in relation to the long axis
Compare mesio-distal widths of mandbular centrals and laterals
laterals are wider
Greatest cervical prominence of any anterior tooth
Max canine
The tooth that is positioned most nearly to the vertical axis when viewed from a proximal view
Max canine
Which tooth has overall greatest tooth length
Max canine (not longest crown)
Which tooth has longest root
Max canine (not longest crown)
Greatest facio-lingual dimension of any anterior tooth
Max canine
Nature of distal contact of max canine
It is centered
In intercuspal position, which tooth has the potential to contact both anterior and posterior teeth
Max canine
Occludes with mand canine and mand premolar
Max canine cusp tip located where
Located facial to long axis
-centered or slightly facial, so lingual aspect is more visible from incisal view
Which lobe of max canine includes the cusp tip
middle facial lobe
Why are the mesial and distal of max canine asymmetric
because of the distal bulge of max canine
Outline shape of max canine from facial view
pentagonal
Tooth with straightest mesial alignment of crown to root
Mand canine
What tooth has a mesial surface of the crown that is almost parallel to the long axis
Mand canine
Tooth with longest crown dimension
Mand canine
Which canine has less prominent cingulum
max or mand
mand
how does the mesio-distal measurements compare between max and mand canine
mand canine is narrower
think distal bulge on max and flat mesial on mand
Anterior tooth most likely to exhibit a bifurcated root
Mand canine
Bifurcation of mand canine roots results in what roots
a facial root and lingual root
Tooth with longest root of all mandibular teeth
Mand canine
longest root of any tooth is max canine
Shape of cross section of root of mand canine
irregularly oval or ovoid
In the cross section of a mandibular canine root at the CEJ, what is the shape and where is it wider
Ovoid shape
wider mesio-distally at the labial end
In cervical cross section (lower down on root) the root of the mand canine is what shape
flattened in a mesio-distal direction
Compare max and mand canine proximal contact areas
mandibular canine contacts are more incisal than max
-think of mand incisors, all even, all high
The convexity of mandibular canine
continuous convex facial surface from incisal to apical end
continuous C shape from crown tip to root apex
Mandibular canine incisal edge is what direction from long axis
lingual
see more of the facial aspect when viewing from occlusal
opposite from max canine
