Molars Flashcards
How many roots do molars possess
Uppers - 3
Lowers - 2
Characteristics of an upper first molar
Diamond shaped
Very small disto-palatal cusp
Strong ridge of enamel (oblique ridge)
What is found either side of the oblique ridge
Fissure
Which tooth often possesses a H like shape on the occlusal surface
Upper first molar
Which cusp is bordered by a fissure which runs onto the buccal surface on the upper first molar
Meso-buccal cusp
Which cusp is largest on an upper first molar
mesio-palatal
What two cusps form the oblique ridge
Mesio-palatal
Disto-buccal
What percentage of first molars have a tubercle of carabelli
60%
Which cusp would a tubercle of carabelli be found
Mesio-palatal
Where are the 3 roots on an upper first molar situated
2 buccal
1 palatal
Lingual root is in the same plane as the disto-buccal root
Which tooth is smaller upper 1st or 2nd molar
2nd
Which tooth may be missing a disto-palatal cusp
Upper second molar
Which shape can an upper 2nd molar be classified as
Triangle
Which tooth often has a partially fused roots
Upper 2nd molar
Which molar has the smallest crown with usually only 3 cusps
Upper 3rd molar
What cusp would an upper 3rd molar be missing
Disto-lingual cusp
Which tooth may show a completely irregular form with a ring of small cuspules
Upper third molar
How many cusps does a lower first molar have
5
3-buccal
2-lingual
Which is the smallest cusp of a lower first molar
Distal cusp
Which tooth possesses a groove starting on the buccal surface deepening into a transverse fissure across the occlusal surface and ending as a groove on the lingual surface
Lower first molar
Which root is usually curved, grooved and broader on a lower first molar
Mesial root
Which direction do the roots of a lower 1st molar usually point
Distally
Which molar is at greater risk of caries
Lower first molar due to the buccal surface pit formed from the buccal groove
Which molar often has a square shape
Lower second
Which cusp is the largest on a lower second molar
Mesio-buccal cusp
How can optimal occlusion be achieved when considering the upper first molars in restoration
Mesial palatal cusp should be on the occlusal plane whereas the buccal cusps should be raised from the plane
