Dental Anatomy Flashcards
the central incisor has … mamelons and developed from …. lobes
3
4
which tooth has the greatest axial inclination of all incisors
central maxillary
is the central max incisor greater MD or FL
MD
is the incisal edge centered over root axis for the central max incisor?
yes
most widely varied anterior tooth?
most widely varied tooth overall?
max lateral incisor
3rd molar
which tooth is most likely to be missing?
max lateral incisor
the maxillary lateral incisors has a …. that extends from enamel onto cementum and complicates …
distolingual groove
root laning
this tooth is least likely to be lost due to decay or perio
maxillary canine
longest of all permanent teeth?
maxillary canine
… has the most nearly vertical long axis of all permanent teeth
maxillary canine
the facial and lingual outline of this tooth is pentagonal
maxillary canine
the cusp tip of the maxillary canine is offset to … and … from center
mesial
facial
the mesial surface of the max canine is … and the distal surface is more …
straighter
convex
is the max canine greater FL or MD
FL
only premolar with bifurcated root?
1st max premolar
longest maxillary posterior crown cervico-incisally?
1st max premolar
1st max PM has a prominent…. and prominent …
ML groove
mesial concavity
which is longer in a max 1st PM, mesial buccal cusp ridge or distal?
mesial
the lingual cusp of the max 1st PM is shorter than buccal cusp and is offset to the
mesial
axial inclination of max 1st PM?
nearly vertical
is the max 1st PM greater FL or MD?
FL
in the max 2nd PM, the lingual and buccal cusps are nearly…
the same height
which is longer on the max 2nd PM, the mesial buccal ridge or distal?
distal
describe the central groove of the max 2nd PM compared to the max 1st PM
shorter with more supplemental grooves
the lingual cusp of the max 2nd PM is inclined toward the
mesial
is the 2nd max PM wider FL or MD
FL
largest maxillary tooth?
1st molar
which is the largest cusp in the 1st max molar?
ML cusp which forms an oblique ridge
the max 1st molar has a prominent …. which is a likely spot for caries and is the only tooth that has a cusp of ..
lingual groove
carabelli
shape of the max 1st molar?
rhomboid
the max 1st molar has a prominent root trunk concavity on the …
distal
extraction of which tooth is most likely to result in a maxillary sinus exposure
max 1st molar
cusps in order from largest to smallest for the maxillary molars
ML>MB>DB>DL
the maxillary molars both have a trifurcated root but which one has a longer trunk?
2nd max molar
most widely varied anatomy?
maxillary 3rd molars
the maxillary 3rd molar only occludes with
1 other tooth (mand 3rd molar)
mand central incisor is only other tooth that has only 1 antagonist
what shape is most common for max 3rd molar
heart shape (3 cusps)
shortest of all perm teeth?
max 3rd molar
20% of the population has 1 or more congenitally missing …
3rd molar (mand or max)
in the max 3rd molar, it is easy to extract because the roots are usually … and …
fused together
curved to the distal
which is the smallest and most symmetrical tooth in the mouth?
mand central incisor
the mand cent incisor is wider FL or MD?
FL
do mand central incisors have root depressions on the distal or mesial?
both
how do you identify a mand lateral incisor
incisal edge twisted towards distolingual
longest crown of any tooth?
mand canine
longest mand tooth?
mand canine
for the mand canine, the mesial cusp ridge is almost … and … than the distal cusp ridge. The cusp tip is displaced towards…
horizontal
shorter
mesial
the cingulum of the mand canine is displaced toward the
distal
the cusp tip of the mand canine is displaced … or ..
lingually or centered
which tooth has an undeveloped lingual cusp that is 2/3 the height of the buccal cusp and is non-functional, similar to cingulum of canine
mand 1st PM
the mand 1st PM has a prominent
mesiolingual developmental groove
the mand 1st PM has a prominent triangular ridge separating …
mesial and distal pits with NO central groove
which tooth usually needs a snake eyes prep
mand 1st PM
which marginal ridge is located more cervically on the mand 1st PM
mesial (be able to identify this on a pic)
which tooth has an occlusal table is lingually inclined at a 45 degree angle from root – greatest in the mandible
mand 1st PM
only PM with 2 lingual cusps?
mand 2nd PM
which tooth tends to have a U or H shaped prep?
2nd mand PM
which tooth has the greatest MD dimension of any tooth?
mand 1st molar
3 teeth that are greater MD than FL
1st mand molar
max central
max lateral
root apices of mand 1st molars lie below the …
mylohyoid line
which tooth is most symmetrical of all the molars
mand 2nd molar
in primary teeth, enamel rods extend…
occlusally from the DEJ
where are the primate spaces located?
max- btn lateral and canine
mand- btn canine and 1st molar
primary max central is the only incisor (prim or perm) that is wider … than …
MD
incisocervically
the primary max central has prominent…
facial and lingual cervical ridges
the cusp tip of the primary max canine is toward the ….
distal
the mesial cusp ridge of the primary max canine is …. than the distal cusp ridge ( all other canines are opposite)
longer
a primary max 1st molar will have a prominent … bulge
MB
the primary mand 1st molar’s … cusp is the longest and largest bu the …. cusp is the sharpest
MB
ML
the primary mand 2nd molar closely resembles the perm…
1st mand molar
which teeth are not succedaneous?
permanent molars
which is the first succedaneous tooth to erupt
mand central
all 20 primary teeth begin to calcify between …. and … in utero
4-6 months
calcification is complete for all primary teeth by …
12 months old
root of a primary tooth is fully formed approx. … after eruption
1 year
root of a permanent tooth fully develops …. after eruption
2-3 years
for permanent 1st molars, calcification begins at… and calcification is complete at …
birth
3 years
all succedaneous teeth have begun to calcify by…
2.5 years
by age …. all but the 3rd molars have begun to calcifu
3
by age …. the permanent canines have begun to calcify
1
which is the last succedaneous tooth to erupt by age 12?
max canine
4 functions of proximal contacts
prevent food impaction
form embrassures
protect periodontium
stabilize dental arch
as a general rule, as you move posteriorly, contacts are located more …. but contacts are never in the … third
cervically
cervical
the contacts of the mand 2nd PM, 1st molar and 2nd molar are aligned in…
a straight line
contacts are often …. to the buccolingual midline except anterior which are …. faciolingually
facial
centered
largest incisal embrassure is located…
btn max lateral and canine
but overall greatest occlusal embrassure is max canine and 1st PM
the facial height of contour on all teeth is located in the ….
cervical third
the lingual height of contour is located in the …. third for all anterior teeth and the … third for all posterior teeth
cervical
middle
maxillary teeth contacts
IJ JM JM MM MM MM MM M
mandibular teeth contacts
II II IM MM MM MM MM M
the TMJ is a … joint and a … joint
ginglymoarthrodial (hinge and sliding)
synovial
the mandibular condyle is covered with dense… NOT … as in other joints
avascular fibrous connective tissue
hyaline cartilage
the articular fossa of the temporal bone is just anterior to the …. and the posterior roof is very thin
auditory canal
the articular fossa of the temporal bone can also be called the … or … fossa
glenoid
mandibular
the …. is the convex bony prominence anterior to the fossa and it influences anterior guidance of dentition
articular eminence
the articular eminence is considered to be the … portion of the joint and is composed of …. able to sustain heavy forces and it is covered in …
functional
thick dense bone
dense avascular fibrous connective tissue
the articular disc is … in the middle, …. in the anterior and … in the posterior
thinnest
thicker
thickest
what is the gold standard for imaging of the TMJ
MRI
the … ligaments attach the disc to the head of the condyle on medial and lateral surfaces. They allow the disc to move like a bucket handle as the mandible moves
collateral
the … ligament surrounds and encloses the TMJ, it attaches from neck of condyle to temporal bone above fossa. It resists separation or dislocation of the condyle from the temporal bone
capsular
the capsular ligament retains and secretes… and it is well …. so it gives feedback on joint position and movement
synovial fluid
innervated
the … ligament is the main stabilizing ligament of the TMJ, it prevents posterior or inferior displacement and limits the extent of rotational opening of the jaw
temporomandibular
the temporomandibular ligament extends from the …. to …
articular eminence
posterior condyle
the … ligament initiates translation of the condyle down the articular eminence
temporomandibular
the … ligament limits posterior movement of the condyle protecting retrodiscal tissue
temporomandibular
during extreme trauma, the neck of the condyle will … before the condyle is forced into the retrodiscal tissue or middle cranial fossa
fracture
which ligament is most likely to be damaged during injection during IANB
sphenomandibular
the …. ligament attaches from sphenoid bone to lingula of mandible and limits excess opening of the mandible
sphenomandibular
the … ligament attaches from the styloid process to angle of mandible and prevents excessive protrusion of the mandible
stylomandibular
what innervates the TMJ?
auriculotemporal branch of V3
which MOM are elevator muscles?
temporalis
medial pterygoid
masseter
the lateral pterygoid does NOT … the mandible. it effects left and right working movements and protrusion
elevate
when the lateral pterygoids are working together, the mandible will …
protrude
when there is an injury on one side affecting the lateral pterygoid, the jaw will move toward … during protrusion
the affected side
the …. is a bodily lateral shift of the mandible in the direction of the working condyle and occurs during the earliest stages of lateral movement/translation
bennet movement
which teeth contact only one other tooth
max 3rd molar
mand central
