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74 Cards in this Set

  • Front
  • Back
Which cusp ridge of the mand 1st is longer
Which cusp is longer on the mand 1st
From the lingual view of the mand 1st PM what surfaces besides the lingual can you see
most of mesial, most of distal, large portion of occlusal
NOTE: on the mand 2nd PM from the lingual you only see the lingual in the Y form
cant delete
cant delete
The prominence of what facial feature makes the facial grooves more evident
prominence of facial ridge
In the occlusocervical direction where are the proximal contacts of mand 1st premolars more precisely located
just cervical to junction of middle and occlusal third
From facial to lingual the mesiodistal width of the mand first pre molar does what
converges as you move lingually
the lingual surface of the mand 1st premolar is best described as what two things
narrow and convex
the mand 1st PM has how many lobes that formed it
4 lobes, 3 facial and 1 lingual
The nonfunctioning cusp of the mand 1st PM is which one
lingual -indicative of all mand post teeth
Viewed proximally the mand 1st PM strikes it's antagonist in the upper arch where.
in the central portion of the occlusal surface
which crown surface combines with the occlussal surface to form the major part of the tooth
large facial lobe
The comparison of occlussal surfaces between max and mand 1st PM is what
the max occlusal surface is much larger
which proximal contact area is smaller on the mand 1st PM
mesial contact
the mand 1st PM differs from the max 1st PM in relation to the central grooves, HOW?
the mand 1st PM usually doesnt have a full central groove due to the transverse ridge splitting it in half
what feature bisects the mand 1st PM occlusal table into mesial and distal halves
Prominent Transverse ridge(transvers ridge formed by 2 triangular ridges)
what two features meet up to form the transverse ridge on a mand 1st PM
lingual ridge of facial cusp and facial ridge of lingual cusp. (can also be called triangular facial ridge and triangular lingual ridge respectively)
the transverse rigdge splits the occlusal surface of a mand 1st PM into 2 fossae what are they
mesial and distal fossa
what ridge of the mand 1st PM contributes most to the transverse ridge
lingual ridge of facial cusp(facial triangular ridge)
what direction does the mesial groove of the mand 1st PM run
what separates the mesial marginal ridge from the mesial ridge of the lingual cusp on the mand 1st PM
mesiolingual groove - it originates from the mesial fossa and runs down onto lingual surface(Unique feature of mand 1st PM)
between the mand canine and mand 1st PM which has a more round cusp tip
mand 1st PM
in which arch is the 1st PM cusp tip of the facial cusp located more distal from the long. axis of the tooth
NOTE mand 1st PM facial cusp located mostly centered mesiodistally
in the mandibular arch both the canine and 1st PM have what distal cusp ridge feature in common
they are longer than their respective mesial cusp ridges
in the max arch the relationship between lengths of distal and mesial cusp ridges of the canine and 1st PM are what
the max canine has a longer distal cusp ridge while the max 1st PM has a longer mesial cusp ridge
from a proximal view the facial cusp of the mand 1st PM is tilted which direction
Which marginal ridge more closely parallels the slope of the lingual cusp of the facial ridge on a mand 1st PM
the mesial marginal ridge
which cervical line is slightly more curved on the mand 1st PM, mesial or distal
mesial(sticks with convention all other teeth we have seen)
the proximal contacts of the mand 1st PM are located where faciolingually
facially - lends to lingual embrasure having more depth/bigger
mand 1st PM HOC's lie where
middle 1/3 on lingual -1mm and cervical 1/3 on facial- < 1/2mm
The mand 1st PM usually has how many roots
Sometimes a longitudinal groove can be found on proximal surfaces of mand 1st PM's, which one is it usually found on
the mand 1st PM is usually described as what
narrow and pointed
which pulp horn is usually absent on mand 1st PMs
lingual-due to cusp developement
the root canal of a mand 1st PM is widest in what direction
faciolingual - similar to canines
root bifurcations are rare in the mand 1st PM, if found they are usually located where?
mand 1st PM's usually erupt at what age
half of the mand 1st PM is like a what tooth and the other is like what other tooth
half like ant tooth and half like post
the tooth shape of the mand 1st PM is described as what
diamond, with a triangular occlusal table
the angle of the mesial and distal marginal ridges of the 1st PM differ how
the mesial tends to be at a 45 degree and the distal is horizontal
best way to tell a mand 1st PM is how
oclussaly you can notice narrow flat mesial surface
the cusp tip of the mand 1st PM is centered how faciolingually and mesiodistally
faciolingually - dead over center
mesiodistally- definitely centered
Wilson's Words
some variations in mand 1st PM occur due to what
lingual cusp being located mesially or distally
in twins most all teeth are very close to identical except they can vary most in what tooth
Mand 1st PM
The 2nd mand PM is only PM to have what
central fossa or central devolopmental pit
the second mand PM usually erupts at what age
what are the 3 forms of the mand 2nd PM
Y shaped, H form and U shaped
how many lobes does the 2nd mand PM Y form, form from
the largest of the two lingual cusps on a mand 2nd PM is
the mesiolingual
how many triangular ridges does the Y form of the mand 2 PM have
3 triangular ridges thus 2 transverse ridges
how many fossae does the occlusal surface of the mand 2nd PM Y form have
3- mesial, distal and central
What is the most common form of the mand 2nd PM
Y shaped with 3 cusps
Describe the lingual groove on the mand 2nd PM Y Form
It comes from the central fossa and runs down the between the 2 lingual cusps
What is the shape of the mand 2nd PM's Y form occlusal table said to be
Square - due to faciolingual width being equal to mesiodistal width when looking at occlusal view
what is the second most common form of the 2nd mand PM
H form has only 2 cusps-facial and lingual
Describe the 2 cusps on the H form mand 2 PM
the 2 cusps are about equal length - facial might be slightly longer
one way to tell mand 1st PM from 2nd is how
look proximally at sloped occlusal table(mesial and distal marginal ridges)-the 1st is more slanted
what surfaces can you see from the lingual view of mand 2nd PM
just lingual side
list the 3 cusps in order from biggest to smallest on the Y form of the 2nd PM
Facial, meisolingual, distolingual
on the Y shaped form of the mand 2nd PM which cusp is biggest
Mesiolingual -use this feature to determine mesial side of tooth during identif.
The mand 2nd PM has what root shape commonly
On the mand 2nd PM which marginal ridge is more cervical - Mesial or Distal
Distal Marginal Ridge is more cervical
which crown is longer, mand 1st PM or 2nd PM
mand 1st PM
Which has the bigger root, mand 1st PM or 2nd PM
2nd PM has a bigger root in all dimensions. both can curve slightly distal
how many roots do mand PMs usually have
On the mand 2nd PM you have two variations in regards to pulp horn number
2 cusp form(both H and U) has 2 pulp horns and 3 cusp form(Y) has 3 pulp horns
the lingual surface of the mand 2nd PM in relation to the 1st PM is what
wider meisodistally and taller occlusocervical
due to the greater lingual development on the mand 2nd PM the distal and mesial marginal ridges appear to be arranged in what relationship to the long axis of the tooth
In the mouth, the ________ is tipped slightly lingual to the long axis of the tooth while the ________ is tipped slightly facial to the long axis of the tooth
Mand 2nd PM, Mand 1st PM
on a mand 2nd PM, the central pit is located where in a faciolingual direction
slightly lingual
in a proximal view of the mand 2nd PM which marginal ridge is located more gingivially
Where and how big are the HOC's on the mand 2nd PM
Facial- cervical 1/3, 1/2 mmm
Ligual- Middle 1/3, 1 mm
How does the root of mand PM appear in a cross section
oval shaped with widest portion being faciolingual measurement
Where might you see a slight concavity on the root of a mand 2nd PM
on the distal or mesial end under where the longitudinal groove is