Molars Flashcards
What shape is the occlusal outline from an occlusal view of mx 1st molars?
rhomboidal
Which angles on max 1st molars are acute?
mesiofacial and distolingual
*rhomboidal shape
which angles on max 1st molars are obtuse?
mesio-lingual and disto-facial
**rhomboidal shape
what direction does the max 1st molar taper?
facial
are the buccal or lingual embrasures larger?
buccal
which root of the 1st mx molar is the largest?
palatal
which root of the 1st mx molar is the smallest?
disto-buccal
*MB root needs rom for MB2 canal, so it needs to be bigger
which tooth when viewed from the facial has the lingual root and facial groove lined up?
mx 1st molar
When the mx 1st moalr has a 4th canal, which root is it typically located in?
mesio-buccal
where are the 3 furcations of the mx 1st molar located?
mesial, buccal, distal
which furcation is closest to the cervial line in mx 1st molars?
mesial
- M –> B –> D
what landmark is the distal boundary of the mx 1st molar?
oblique ridge
*obtuse angles of the rhomboidal shape coincide with the direction of the ridge
what angles connect the oblique ridge in the mx 1st molar?
ML and DB
which cusp of the mx 1st molar occludes wit the central fossa of the mandibular molars?
ML
which tooth has the greatest FL diameter?
mx 1st molar
*think of the cusp of carabelli
Which tooth is the closest in size FL vs MD in MAX. POSTERIOR teeth?
mx 1st molar
Which part of the mx 1st molar is longer? MD on the facial side, or MD on the lingual side?
mesio-distal on the facial side
which cusp of mx 1st molar is the largest and longest?
mesio-lingual cusp
which tooth is most likely to be forced into the maxillary sinus during extraction?
mx 1st molar
Does the mx 1st or 2nd molar have a shorter disto-lingual groove?
mx 1st molar
if the disto-lingual cusp is missing, which tooth can have 3 cusps and look like a heart?
mx 2nd molar
which molar has roots that are less divergent and more distally inclined than the others?
mx 2nd molar
what shape is the mx 2nd molar in a cross section at the cervical line?
triangular
what tooth has a Y or dryopethicus groove pattern?
md 1st molar
what is the occlusal outline of the md 1st molar?
pentagon
Which cusp of md 1st molar is smallest?
distal cusp
*MB > ML > DL > DB > D
what cusp of the md 1st molar is the largest?
MF
**MB > ML > DL > DB > D
Which tooth has the LARGEST M-D dimension of ANY tooth?
Md 1st molar
- it has the distal cusp
- Longest M-D of All teeth, mandibulars, posteriors, and molars
what tooth is the only mandibular one to be longer MD than FL
md 1st molar
*Longest M-D of All teeth, mandibulars, posteriors, and molars
which tooth is the only posterior tooth that is wider MD than FL?
md 1st molar
*Longest M-D of All teeth, mandibulars, posteriors, and molars
which tooth has the largest F-L dimension of any other mandibular tooth?
md 1st molar
*mx 1st molar has largest FL of any tooth
what tooth has the largest occlusal-cervical crown dimension than any other tooth?
md 1st molar
When compared to the ascending ramus, where are the facial surfaces of the md 1st molar?
medial
- think of an IA block
- same with md 2nd molar
how many facial cusps does the md 1st molar have?
3
what is the deveopmental groove between the disto-buccal/facial and distal cusp on the md 1st molar called?
the disto-facial groove
md 1st molar has how many roots and canals?
2 roots, 3 canals
*2 in mesial root
what tooth has the longest root of any other molar?
md 1st molar
*mx canine root is longest of any rooth
what tooth has the greatest root separation?
md 1st moalr
what md 1st molar cusps occlude in the central fossa of the maxillary molars?
DB cusps
what about md 1st molar accommodates working movements?
ideal position and height of lingual cusps
how do you tell a right vs left md 2nd molar?
the FL on the mesial side is wider
the crown of the md 2nd molar inclines in what direction?
mesial and lingual
how many teeth does a mx 3rd molar occlude with?
1
*md centrals also only occlude with 1
what molar most frequently has 3 cusps?
mx 3rd molar
from an occlusal view, what shape is the mx 3rd molar?
heart
what toot has the great variation in crown morphology?
md 3rd molars
*then mx laterals
what tooth has the greatest distal root inclination of any other tooth?
md 3rd molars
what mandibular tooth has the shortest root of any other mandibular tooth?
md 3rd molars
