Teeth EX 1 Flashcards
the crown shape of ______ and _____ are trapezoidal
Central and Lateral maxillary incisal
________ are the raised portion of ridges near CEJ of teeth
Perikymata
which tooth is easy to extract without fear of fracturing the root?
max central incisor
Maxillary central incisor has a lingual fossa shaped like what??
trapezoid
the crown outline of the incisal view of Max. central incisor converges _______
Lingually
which tooth has the cervical line that curves incisally/occlusally the most?
Mx central incisor
which tooth has a mesial lingual outline of an “S”?
Max central incisor
where does convexity of cingulum start on Max central incisor?
halfway bw incisal ridge and cervical line on Lingual surface
the crown length/width of the Mx lateral incisor is how much less than central?
1.0-1.5 mm shorter
2.0mm less width
which incisal angle is rounded on MX lateral incisor?
trick Q! they’re both rounded
which direction does root of Mx lateral incisor curve towards?
distal
what shape is the lingual fossa on MX lateral incisor?
Triangle
what is a linguogingival groove? which tooth is it unique too?
- a groove on distal side of cingulum that may need to be restored
- MX lateral incisor
which tooth has a facial outline that is more continuously convex?
MX central or lateral incisor?
MX lateral incisor
the crest of the cingulum of the MX lateral incisor is slightly _____
distal
which tooth is known for having most developmental anomalies? (dens in dent, aplasia, microdontia, peg lateral)
MX lateral incisor
the mandibular first molar has how many cusps?
5
the shape of the crown of a mandibular first molar from the facial view is ______, but from the mesial/distal view it’s _______
trapezoidal
rhomboidal
In the mandibular first molar, the _____ cusps are pointed while the _____ cusps are more rounded
Lingual
Facial
what is at the end of the Mesiofacial groove on a mandibular first molar that might need restoration?
facial pit
the cervical line dips and points to the bifurcation on which tooth?
Man first molar
on the mandibular first molar, which root is bigger?
Mesial
are all 5 cusps visible from the facial on mandibular first molar?
yes
the _______ cusp is wider than the ____ cusp on the lingual view of a Mandibular first molar
Mesiolingual
Distolingual
on a mandibular first molar, the lingual cervical line is _____mm more ______
1.0mm, occlusal
which cusps can you see from the facial on Mandibular first molar? from lingual?
Facial: all 5
Lingual: Lingual and distal, not facial
Dr. Mcdonald said that on the Man first molar, the lingual/facial cusps are ___________ height if measured from CEJ
SAME
where are the greatest curvatures on facial and lingual on mandibular first molar?
facial: cervical 1/3
lingual: middle of middle 1/3
the faciolingual measurement of occlusal on mandibular first molar is greatest in ______ half of crown
mesial
rank the sizes of the mandibular first molar cusps from largest to smallest
MF > ML/DL > DF >D
rank the sizes of the mandibular first molar cusps from tallest to shortest
ML > DL > MF > DF > D
the cusps of the mandibular first molar have _____ but don’t have _____
triangular ridges
DONT HAVE transverse ridges
compare the sizes of the Man second molar to mandibular first molar
mandibular second molar has a narrower crown both mesiodistally and occlusocervically
what separates the MF/DF cusps on the mandibular second molar?
Facial/Buccal groove
which cusp is wider on Man second molar: MF or DF cusp?
trick question! they are equal in mesiodistal length/width
compare the roots of a mandibular second molar to mandibular first molar
mandibular second molar roots:
- roots are closer
- roots incline distally more
- root trunk shorter
lingual width of the mandibular ______ molar may be wider than the mandibular ______ molar
second, first
the lingual cusps on the mandibular second molar are taller because ______
the cervical line is higher occlusaly on the lingual
the mandibular second molar has how many cusps?
4
ALL mandibular molars are wider in the _____ dimension than the ______ dimension
Mesiodistal, Faciolingual
( the tooth is wider than it is deep)
on the mandibular second molar, the greatest Faciolingual measurement on the occlusal view is on the ______ side
Mesial
(tooth is thicker/wider on mesial side)
on the ______ the major grooves cross in a way that creates a “+” shape
mandibular second molar
what are the 3 pits on the occlusal view of man second molar?
mesial, distal, central
on the man 2nd molar, triangular ridges meet to form _____
transverse ridges
on the mesial view of the man 2nd molar, the _____ cusp is shorter and more rounded while the _______ cusp is longer and more pointed
facial
lingual
does the mandibular second molar have a distal cusp?
NO
what resembles a mandibular canine but only has 2 cusps?
mandibular first premolar
which is the ONLY posterior tooth that has an occlusal table that slopes cervically?
mandibular first premolar
what type of ridges does a mandibular first premolar have?
2 triangular, and transverse
the distal marginal ridge of the mandibular first premolar is more _____ than the mesial marginal ridge
horizontal
the occlusal outline of a mandibular first premolar is shaped like a _____ but its occlusal table is shaped like a ______
diamond, triangle
is there a central pit in a man first premolar?
NO
compare the facial cusps on the mandibular first and second premolar
Man. second premolar has a shorter/blunter facial cusp than first premolar
how many varieties are there of a man 2nd premolar?
3: Y, U, H
Y: 3 cusp, 5 lobe
U: 2 cusp, 4 lobe
H: 2 cusp, 4 lobe
the root of a man 2nd premolar is ______ than a canines root and usually has ___ canal(s)
shorter, 1
rank the cusp sizes of a 3 cusp mandibular 2nd premolar
F > ML > DL
in the man 2nd premolar, the ML cusp tip is _____mm shorter than the facial cusp tip, and the DL cusp tip is _____mm shorter than the facial cusp tip
1.5mm, 2.0mm`
which mandibular tooth is the only one that has a wider lingual mesiodistal width than facial mesiodistal width?
mandibular second premolar
does the 3 cusp variety of the man. second premolar have transverse ridges?
no
