Premolars - Molars Flashcards
what tooth has the most pronounced developmental marginal groove of any MAXILLARY tooth?
max first premolar
*leads into the mesial concavity
what shape is the cervical cross section of a max first premolar?
kidney
what is the non-molar tooth that most frequently exhibits three roots?
max first premolar
*think of non-molar tooth that usually has two roots
the facial cusp of the max first premolar is offset in which direction?
distal
*bc it has a longer mesio-facial cusp ridge
what is the only premolar with a longer mesial cusp ridge ?
max first
*so does the PRIMARY max canine
what premolar has the steepest inclines?
max 1rst premolar
the maxillary premolars (both) lingual cusps are off set to which side?
mesial
*remember that the buccal of the first is unique in that it is off set to the distal
what tooth in the POSTERIOR has the greatest cervico-occlusal crown height
max first premolar
which non - molar tooth has the sharpest demarcation between the pulp chamber and canal
max first premolar
which premolar has more identical placement of size and posistion of cusps?
max second premolar
which premolar has two cusps that are of equal height?
max second premolar
what is the most symmetrical posterior tooth?
max second premolar
which tooth has a short cental groove with a lot of supplemental grooves?
max second premolar
which tooth has fossa that are closest in size compared to any other posterior tooth?
*makes the tooth look WRINKLY
max second premolar
which premolar has a uniquely prominent triangular ridge?
mandib first PM
*snake eyes, no cental groove
what causes the snake eyes of a mandib first PM?
prominent triangular ridge
where does the mesiolingual groove on mandib first PMs originate?
occlusal pit
the mesiolingual developmental groove on a mandib PM extends where?
from occlusal pit to the proximal surface
what is the ONLY tooth with a mesio-lingual groove?
mandib first PM
what does the mesio-lingual developmental groove of the mandib first PM do to the mesial marginal ridge of that tooth?
makes it run at a 45 degree angle
for the mandib first PM, which marginal ridge is located more cervically?
mesial
for the mandib first PM, which view (mesial/distal) can be used to see more of the occlusal surface?
mesial
*due to the 45 degree mesial margiinal ridge
what is the occlusal outline shape for the mandib first PM?
diamond
in the rare event of a second canal for a mandib 1rst PM it is most likely located to the (facial/lingual)
lingual
what is the only PM that frequently only has one pulp horn?
mandib first
due to small lingual cusp
the lingual cusp of the mandib first PM is approx ____ the height of the facial cusp?
1/3
the lingual cusp of a mandib first PM is similar in development to ____
cingulum of a canine
does the lingual cusp of a mandib first PM normally occlude?
no
what tooth has the most variation of ALL POSTERIOR teeth in facial vs lingual cusp height?
mandib first PM
the facial masticatory mucosa (attached gingiva) is (widest/narrowest) on the facial aspect of mandib PM?
narrowest
*remember that this is for MANDIBULAR!!!
what POSTERIOR tooth has the smallest facio-lingual dimension?
mandib first PM
what MANDIBULAR tooth is the closest in facio-lingual vs mesio-distal diameter?
mandib first PM
when viewed from the occlusal, the basic coronal outline of a mandib second PM is what shape?
pentagon
*BE CAREFUL, the occlusal table is RECTANGULAR
which PM is most likely to have a crescent shaped central developmental groove is what?
mandib second PM
the shortest interdental papilla is where?
between the mandibular second PM and the mandibular first molar
the Y-type mandibular premolar has how many cusps?
one facial and two lingual
the Y-type mandib second PM has the same number of occlusal pits as what other tooth?
MAXILLARY 1rst MOLAR
3
what is the only PM with multiple lingual cusps and a lingual groove?
mandib 2nd PM
what is the only PM with a central fossa?
mandib second PM
what is the most congenitally missing PM?
mandib 2nd
what is the shape of the occlusal outline form of a max first molar
rhomboidal
what angles from the occlusal view of a max first molar are acute?
mesiofacial and distolingual
what angles from the occlusal view of a max first molar are obtuse
distobuccal and mesiolingual
*these make up the oblique ridge
which embrasure (buccal/lingual) is larger for a max first molar?
buccal
*max first molars taper to the facial
what are the most prone surfaces of all molars?
lingual of maxillary
buccal of mandibular
what is the largest root of the max first molar
palatal
what is the smallest root of the max first molar?
distobuccal
for max first molars, from the facial view, the apex of the lingual root is in line with what?
the facial groove
for max molars, from the lingual view, the apex of the lingual root is in line with what?
the midpoint of the MD diameter
if there is a 4th pulp canal in the max first molar, where is it usually?
mesiobuccal canal
which furcation of the max first molar is the closest to the cervical line?
mesial
which furcation of the max first molar is the furthest from the cervical line
distal
- M - B - D
- you get further away from the cervical line the more distal you go
the oblique ridge of max first molar forms what?
distal boundary of the central fossa
which angles (acute/obtuse) form the oblique ridge?
obtuse
the center of the oblique ridge on a max first molar is at the same level as what?
marginal ridge
the mesiolingual cusp of the max molar occludes where?
in the central fossa of the mandib molars
what tooth has the greatest faciolingual diameter for all teeth (crowns)
max first molar
*think cusp of carabelli
which max posterior tooth is closest in size faceio-lingually vs mesio-distally?
max first molar
for max first molars, are they wider MD facially or lingually?
facially
what is the only cusp of the max first and second molar that is NOT part of the molar cusp triangle?
distolingual cusp
what is the largest and longst cusp of the max first molars/
mesiolingual
which tooth is most likely to be forced into the maxillary sinus during an extraction?
max first molar
where is the concavity on max first molars that can pose special problems in matrix placement?
distal
which max molar has a longer distolingual groove?
max second molar
which max molar may not have a distolingual cusp present/
max second molar
how do the roots of the max second molar complare to the roots of the first molar?
less divergent and have greater DISTAL inclinations
what is the shape of the cross sectional outline of a max second molar?
triangular
what is the term for the groove pattern for the mandib first molar
Y or dryopethicus pattern
what is the shape of the occlusal outline of a mandibular first molar?
pentagon
what is the largest cusp of the mandib first molar
mesiofacial
what tooth has the largest MD dimension in the mouth?
mandib first molar
what are the ONLY mandib molars that are wider MD than FL
mandib first
what are the ONLY posterior teeth that are wider MD than FL
mandib first
what tooth has the largest FL diameter of any mandibular tooth?
mandib first molar
what tooth is the largest occlusocervically of any mandibular molar?
mandib first molar
the facial surfaces of teh mandibular molars are located (medial/distal) to teh border of the ascending ramus?
medial
what is a key feature that differentiates a mandib first and second molar?
number of developmental grooves
*M2 has one buccal)
what is the name of the groove between the DF cusp and the D cusp of the mandibular first molar ?
distofacial (NOT distal)
how many canals does the mandib first molar have?
3
*usually have 2 MESIAL canals
what tooth has the longest root of any other molar?
mandib first molar
what tooth has the greatest root separation of any other tooth?
mandib first molar
at a mid root cross section for the first molars, the largest with be where?
mesial of mandibular
need more room for MB2
what root has greatest FL dimension of any other root?
Mesial of mandib first molar
what cusp occludes in teh central fossa of the max molars
distobuccal cusp of mandib
the ideal position and height of lingual cusps of mandib first molars accomodates what?
working movement
what is the occlusal pattern for the mandib second molar
cruciform
where is the greatest FL dimension of a mandib second molar?
mesial 1/3
how you tell the R from the L
what are the only POSTERIOR teeth that are wider MD than FL
mandibular molars
what are the only mandibular teeth that are wider MD than FL
mandib molars
the crown of the mandib second molar inclines where?
mesially and lingually
which teeth have long axis of their root apices facial and their crowns lingual?
mandib molars
which molar most frequently has only 3 cusps
max third molars (most frequently heart shaped)
what tooth has the greatest distal root inclination of any tooth?
MANDIB 3rd molars
what tooth has the shortest root of any mandibular tooth?
mandib 3rd root
