L6 MAX PREMOLARS Flashcards
Number of the right max right 1st molar
5
Number of right max left 1st molar
12
Number of right max right 2nd molar
4
Number of right max left 2nd molar
13
Name the two cusp of the maxillary premolars
Lingual = functional cusp Buccal = non-functional cusp
DO NOT REFER TO THEM AS BICUSPIDS
What kind of teeth replace deciduous molar teeth
Succedaneous teeth
Which lobe of the max premolars forms the buccal cusp
Middle lobe
Max premolars develop from how many lobes
4
What is the demarcation between the buccal and lingual lobes of the maxillary premolars
Central development groove
Outline of max first molar from buccal view
Trapezoidal
From buccal view of maxillary first premolar, the mesial cusp arm of buccal cusp is _____ and _____
Longer and straighter
From buccal view of maxillary first premolar, the distal cusp arm of the buccal cusp is _____ and more ______
Short an more curved
From buccal view of maxillary first premolar, the buccal height of contour is in the
Cervical 1/3 of the crown
From buccal view of maxillary first premolar, the mesial contact is in the
Middle 1/3
From buccal view of maxillary first premolar, distal contact is in the
Is it generally convex or concave
Middle 1/3 boarder and more cervical
Generally convex
From buccal view of maxillary first premolar, the middle buccal lobe become the
Prominent buccal ridge and associated development depressions
From buccal view of maxillary first premolar, the less developed mesial and distal lobes become
Mesial and distal line angles
From lingual view of maxillary first premolar, the crown tapers _____
Lingually
From lingual view of maxillary first premolar, the lingual part of the crown is _____ than the buccal
Narrow
From lingual view of maxillary first premolar, the lingual is smoothly
Convex
From lingual view of maxillary first premolar, the lingual cusp is ______ and more _______ than the buccal cusp
Shorter and more pointed
From lingual view of maxillary first premolar, can you see the buccal cusp
Buccal cusp is visible
From lingual view of maxillary first premolar, the lingual cusp is located
Mesially
From lingual view of maxillary first premolar, the mesiolingual cusp arm ML is _____ than the distolingual cusp arm DL
Shorter, this is opposite of the buccal cup where the ML is longer than the DL
From mesial view of maxillary first premolar, outline in shape is
Trapezoidal
From mesial view of maxillary first premolar, How many cusps are visible
2 cusp visible - buccal and lingual
From mesial view of maxillary first premolar, which cusp is taller
Buccal cusp is taller
From mesial view of maxillary first premolar, the. Buccal height of contour is in the
Cervical 1/3
From mesial view of maxillary first premolar, the lingual height of contour
Middle 1/3
From mesial view of maxillary first premolar, do they have a mesial developmental depression/concavity
Yes, max 2nd premolar do not
From mesial view of maxillary first premolar, which side the dos mesial marginal ridge developmental groove lie more on
Lingual
From mesial view of maxillary first premolar, mesial contact area is
Middle 1/3 and offset buccally
From mesial view of maxillary first premolar, how many roots
50-60% have 2 roots, buccal and lingual
From mesial view of maxillary first premolar, where does the long root trunk extend from
From the CEJ to where the root divides (the furcation)
From distal view of maxillary first premolar, list the difference from the mesial view (the absence of:)
- Mesial concavity
- Mesial developmental region
- Marginal ridge developmental groove
From distal view of maxillary first premolar, the curvature of cervical line is ____ than mesial
Less than mesial
From distal view of maxillary first premolar, distal contact are is in
Middle 1/3
- offset buccally
- contact is broader
- located more cervical compared to the mesial
From occlusal view of maxillary first premolar, outline in shape
Hexagonal
From occlusal view of maxillary first premolar, the Buccolingual dimension is ____ the the mesiodistal
BL greater than MD
From occlusal view of maxillary first premolar, the mesial buccal cusp ridge is ______ than disco buccal cusp ridge
MB longer than DB
From occlusal view of maxillary first premolar, the mesiolingual cusp ridge is ____ than the distolingual cusp ridge
ML shorter than DL
From occlusal view of maxillary first premolar, describe the buccal and lingual triangular ridges
Lingual is less prominent, angled not straight
What is a triangular ridge
- A prominent elevation, triangle in cross section
- extend from the tip of a cusp toward the central portion of the occlusal surface of a tooth
From occlusal view of maxillary first premolar, what separates thes buccal and lingual cusps
Central developmental groove
From occlusal view of maxillary first premolar, what groove comes off the central dev. Groove
Mesial marginal ridge developmental groove
From occlusal view of maxillary first premolar, mesiobuccal and distobuccal supplemental groove rise from what groove
Central development groove
From occlusal view of maxillary first premolar, where are the mesial and distal development pits located.
Deep parts of the mesial and distal fossae
From occlusal view of maxillary first premolar, where are the mesial and distal triangular fossa located
From the marginal ridges, and make a point/pit at the central development groove
How many roots of maxillary 1st premolar
2 separate roots buccal and lingual
From buccal view of maxillary first premolar, the rooots resemble the roots of the _____
Canine (they just shorter)
Roots of the max 1st premolar are _____ BL, and _____ MD
Broad BL, narrow MD
The long root trunk of 1st max premolar is about how long
1/2-2/3 length of root, stops at point of bifurcation
Maxillary first premolars have a ______ developmental depression on its roots
Mesial development depression
Describe BL cross section of max 1st premolar roots
Two pulp horns and two pulp canals
Which pulp canal of the maxillary 1st premolar is larger
Buccal is larger
The MD cross section of a maxillary first premolar resembles which tooth
Canine
Transverse cross section of maxillary 1st premolar is what shape
Kidney shaped
Is the maxillary first or second premolar smaller
Second premolar is smaller
Is the 1st or 2nd maxillary premolar more rounded and less angular
Max 2nd premolar
How many roots do the maxillary 2nd premolars have
Single root
From buccal view of maxillary second premolar, the mesiobuccal cusp ridge is _____ than the distobuccal cusp ridge
MB shorter than BD cusp ride
From buccal view of maxillary second premolar, is the buccal cusp longer or shorter than the max 1st premolar
Buccal cusp is not as long
From lingual view of maxillary second premolar, the lingual cup is _______ than the lingual cusp of the 1st max premolar
Longer
From lingual view of maxillary second premolar, Why is there less visibility of the buccal profile of the tooth
Because the lingual cusp is longer than the buccal
From mesial view of maxillary second premolar, describe the size comparison of the buccal and lingual cusps
Approximately equal in size, but shorter compared to the 1st premolar
From mesial view of maxillary second premolar, the mesial contact is in the
Middle 1/3 and slightly offset to the buccal
From mesial view of maxillary second premolar, do you see a marginal ridge developmental groove
NO
From mesial view of maxillary second premolar, do you see a mesial developmental depression
NO
From mesial view of maxillary second premolar, describe the root
Single tapered root
From distal view of maxillary second premolar, the distal contact is in the
Middle 1/3 and offset to the buccal
From distal view of maxillary second premolar, outline of tooth
Trapezoidal
From occlusal view of maxillary second premolar, describe the shape
Rounded or oval
From occlusal view of maxillary second premolar, the MB and DB line angle are more ______
Rounded
From occlusal view of maxillary second premolar, there is less _____ convergence
Less lingual convergence
From occlusal view of maxillary second premolar, the central developmental groove is shorter than the 1st premolar therefore describe the mesial and distal marginal ridge
Mesial and distal marginal ridge are WIDER
From occlusal view of maxillary second premolar, what give it its wrinkled appearance
It’s numerous supplemental grooves
Max 2nd premolar have how many roots and canals
Single tapered root, 50% have two canals
Which root is longer between the 1st and 2nd mainly premolars
Neighbor, root length is the same
The root of a maxillary 2nd premolar is ____ BL, and ______ MD
Broad BL, and narrow MD
Do yo observation a development depression on the root of a maxillary 2nd premolar
No!
Describe buccolingual cross section of maxillary 2nd premolar
Two pulp horns (same height), have two pulp canals
Describe mesiodistal cross section of maxillary 2nd premolar
Same as first pre molar, it resemble the canine
Mesial height of contour of maxillary second premolar is
Middle 1/3
Distal height of contour of maxillary second premolar is
Middle 1/3
Buccal height of contour of maxillary second premolar is
Cervical 1/3
Lingual height of contour of maxillary second premolar is
Middle 1/3
Maxillary first pre molars erupt at what age
10-11
Maxillary second premolars erupt at what age
10-12
Initiation of calcification of maxillary first premolar is
1 1/2 - 1 3/4 years
Initiation of calcification of maxillary second premolar is
2-2 1/4 years
Completion of root of maxillary first premolar
12-13 yers
Completion of root of maxillary second premolar
12-14 years
Completion of crown of maxillary first premolar
5-6 year
Completion of crown of maxillary second premolar
6-7 years
While the maxillary 1st and 2nd premolars have approximately the same dimension, which one is larger overall
1st maxillary premolar is larger overall
