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Molars
Anatomy
86
Dentistry
Graduate
09/12/2012

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Cards

Term
Which teeth are the largest and strongest in the mouth?
Definition
Molars
Term
T/F the 1st permanent molar is the 1st permanent tooth to erupt?
Definition
T
Term
T/F molars are succedaenous
Definition
F, do not replace teeth
Term
T/F Molars have primary dentition counterparts
Definition
T; max/mand first and 2nd primary molars
Term
How many lobes to the maxillary molars usually form from?
Definition
five
Term
Position of cusps on max 1st molar
Definition
2 buccal, 2 lingual, and a cusp of carabelli on the mesialpalatal line
Term
How many cusps do 3 and 14 have?
Definition
Usually 4; Four prominent cusps and a non functional cusp of carabelli
Term
How many cusps do 1,2,15,16 have?
Definition
Usually four ONLY
Term
30 and 19 develop from how many lobes
Definition
The mandibular first molars develop from five lobes
Term
What numbers are the mandibular first molars
Definition
19 permanent mandibular left first molar
30 permanent mandibular right first molar
Term
What numbers are the mandibular second molars
Definition
18 permanent mandibular left second molar
31 permanent mandibular right second molar
Term
What numbers are max/mand third molars
Definition
1 16 17 32
Term
What numbers are the maxillary first molars
Definition
3 - permanent maxillary right first molar
14 - permanent maxillary left first molar
Term
What numbers are the maxillary second molars
Definition
2 permanent maxillary right second molar
15 permanent maxillary left second molar
Term
How many lobes do 1,2,15,16,17,18,31,32 develop from
Definition
Four lobes for the max/mand second and third molars
Term
Cusp of carbelli is present on which teeth?
Definition
Maxillary first molars 3 and 14
Term
When do 1st molars come in?
Definition
6
Term
When do second molars come in?
Definition
12
Term
When do third molars come in?
Definition
18
Term
How many roots do the maxillary molars have?
Definition
3; 2 buccal, 1 lingual
Term
Maxillary molars have how many well DEVELOPED cusps?
Definition
4 (cusp of carabelli is nonfunctional)
Term
Largest tooth in maxillary arch?
Definition
3 and 14
Term
Cusp of carbelli is mostly present where?
Definition
Mesial lingual cusp
Term
Largest cusp on 3 and 14?
Definition
Mesiolingual because of addition of cusp of carabelli
Term
Occlusal view of the 1st max molar is what shape?
Definition
Rhomboid
Term
Where does the oblique ridge of the 3 and 14 run?
Definition
DB to ML (ear-to-nose). Oblique ridges connect two triangular ridges at an angle across the occlusal surface
Term
Three major cusps of 3/14?
Definition
DB, MB, ML; heart shaped
oblique ridge runs from db to ml
Term
From teeth 3-1, which cusp gets smaller?
Definition
DL cusp
Term
Facially, what divides the MB and DB cusps?
Definition
Buccal developmental groove divides the two buccal cusps
Term
Contacts of posterior teeth are where?
Definition
Somewhere in the middle third
Term
Proximal contacts of 3 and 14?
Definition
Mesial= junction occlusal/middle 1/3
distal = middle 1/3
Term
For 3/14, which cusps are larger: facial or lingual?
Definition
Lingual, remember cusp of carabelli and what it does to the ML cusp
Term
On the lingual, what separates the mesial and distal cusps?
Definition
Developmental groove that will extend onto the occlusal surface
Term
Which cusp is smallest on numbers 3 and 14
Definition
DL
Term
Which surface is wider: buccal or lingual
Definition
Lingual surface is wider
Term
Which tooth is wider on the lingual rather than facial?
Definition
3/14. Teeth taper toward facial
Term
HoC 3/14
Definition
buccal: gingival 1/3
lingual: middle 1/3
Term
What is prominent on the distal of 3/14?
Definition
Distal depression from cervical line to DB root(like 5/12 mesial depresion)
Term
Which marginal ridge is shorter on 3/14?
Definition
distal marginal ridge is shorter thus you can see more of the occlusal surface from the distal
Term
Root size for 3/14?
Definition
Lingual > MB > DB
Term
T/F The roots of 3/14 are outside the confines of the crown when viewed B/L?
Definition
F; the roots are within the confines of the crown
Term
T/F The roots of 3/14 are outside the confines of the crown when viewed proximally?
Definition
True, the roots flare out past the confines of the crown slightly
Term
Describe the palatal root of 3/14
Definition
Wide M-D
Term
T/F 3/14 are bifurcated
Definition
False, trifurcated
Term
Why is the lingual embrasure of 3/14 smaller than the facial?
Definition
3/14 taper toward facial
Term
T/F 3/14 taper distally and buccally?
Definition
T
Term
T/F 2 and 15 have a shorter crown than 3 and 14?
Definition
True, the crown is shorter
Term
Which buccal cusp is sharp and which is round on 3/14
Definition
DB cup is sharp
MB is round
Term
T/F the crown of 2/15 is smaller than that of 3/14
Definition
True; the crown is shorter than the max 1st
Term
T/F 2/15 are more narrow mesio-distally
Definition
True
Term
Typically, as you go from premolar to molars, what happens to the length of the crown
Definition
Gets smaller
Term
T/F 2/15 have cusp of carabelli
Definition
F
Term
T/F the roots of 2/15 arent parallel
Definition
F; they are parallel
Term
T/F A line drawn through the DL cusp of 2/15 will bisect the apex of the lingual root
Definition
T; important!
Term
HoC of 2/15
Definition
Buccal - gingival 1/3
Lingual - middle 1/3
Term
In 2/15, which root is bigger: MB or DB?
Definition
MB
Term
When looking from the mesial, how many roots can you see for 2/15?
Definition
2; MB and palatal
Term
When looking from the distal. how many roots can you see for 2/15?
Definition
3
Term
T/F 2/15 taper toward the distal like 3/14
Definition
True; 2nd molars taper toward distal
Term
What direction does the oblique ridge of 2/15 run?
Definition
DB to ML cusps
Term
T/F the roots of 2/14 are closer together and outside the confines of the crown
Definition
False; the roots are closer together, but they also stay within the confines of the crown, unlike 3/15 (when viewed proximally). Also, roots are parallel
Term
How many developmental grooves are present on the facial of 19 and 30
Definition
2: mesial buccal and distal buccal grooves
Term
Largest tooth in the mandibular arch?
Definition
19/30
Term
Most diseased tooth?
Definition
19/30 -- so many grooves and pits
Term
How many cusps does 19/30 have?
Definition
5 -- four are functional
Term
How many roots do 19/30 have?
Definition
Term
How many cusps can you see when looking at 19/30 buccally?
Definition
3: MB>DB>distal
Term
How many cusps can you see when looking at 19/30 lingually?
Definition
2: ML >DL
Term
Which surface is greater for 19/30: facial or lingual?
Definition
Facial because there are three cusps
Term
Proximal contacts of 19/30?
Definition
Mesial: junction of occlusal/middle 1/3
Distal: middle 1/3
Term
Which root is curved in 19/30?
Definition
Mesial root curves distally
Term
How many roots do 19/30 have?
Definition
Two: mesial and distal
Term
For 19/30, which proximal area if more convex: distal or mesial?
Definition
Distal because of the presence of a third cusp
Term
Lingually, which cusp is larger in 19/30: DL or ML?
Definition
ML.
Term
What separates the lingual cusps in 19/30?
Definition
lingual groove
Term
Which root is bigger for 19/30
Definition
Mesial
Term
For 19/30, which marginal ridge is longer: distal or mesial?
Definition
Mesial because the distal cusp shortens the distal marginal ridge
Term
What geometric shape does the occlusal surface of 19/30 make?
Definition
Pentagon
Term
T/F 19/30 taper toward the distal?
Definition
True
Term
HoC 19/30
Definition
Buccal- gingival 1/3
Lingual - middle 1/3
Term
How many cusps do 18/31 have?
Definition
4
Term
Order the cusp heights of 18/31
Definition
All are roughly of equal heigh
Term
What is unique about the MB cusp of 18/31
Definition
Bulbous
Term
What pattern does the groove of 18/31
Definition
"+"
Term
Proximally, what direction does 18/31 taper towards
Definition
Distal
Term
Compare the marginal ridges of 18/31
Definition
Mesial marginal ridge more pronounced than distal because tooth tapers tawrd distal.
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