Permanent Mandibular Molars Flashcards
What can you see from the buccal view on mandibular first molars?
both lingual cusp tips
How many buccal cusps do mandibular first molars have and what are they?
three- mesiobuccal, distobuccal, and distal
How many buccal cusps do mandibular second molars have and what are they?
two- mesiobuccal and distobuccal
What is visible from the buccal view on mandibular second molars?
both lingual cusp tips
How many buccal grooves do mandibular first molars have and what are they?
two- mesiobuccal and distobuccal
How many buccal grooves do mandibular second molars have?
one
How many buccal roots do mandibular first and second molars have and what are they?
2 roots- mesial and distal
Which mandibular molar has roots that are more widely separated with a short root trunk?
first
Which mandibular molar has roots that are less separated or more parallel with a longer root trunk?
second
Which mandibular molar has roots that are more curved?
first
Which mandibular molar has straighter roots?
second
Which mandibular molar has roots that both apices are directed toward the centerline of the tooth and are similar in shape to the handle of pliers?
second
Which mandibular molar has a mesial root that bows out beyond the mesial crown outline and then curves back distally ?
first
Which mandibular molar has a more pointed apex of the straighter distal root that often lies distal to the distal crown outline?
first
Which mandibular molar has a shorter root trunk?
first
Which mandibular molar has a distal cusp which is the smallest cusp on the buccal surface?
first
Which mandibular molar has a distobuccal cusp which is the smallest cusp on the buccal surface?
second
Which mandibular molar has a crown that tapers and is shorter toward the distal?
both first and second
Which mandibular molar has a crown that has more distal bulge beyond the root than on the mesial?
both first and second
Is the mesial or distal root longer on both first and second molars?
mesial
Which groove separetes the mesiolingual cusp from the distolingual cusp?
lingual groove
Which mandibular molar has less crown taper to the lingual?
second
Which mandibular molar has less root spread?
second
Which mandibular molar has more curved roots?
first
Which surface of the root trunk has a depression between the bifurcation and the cervical line on both mandibular molars?
lingual surface
On both mandibular molars the cervical line is
relatively straight mesiodistally but may dip in which direction toward the bifurcation between the mesial and distal roots?
cervically
Which cup is the longest cusp for both first and second molars?
mesiolingual
Which marginal ridge is more cervical than the mesial marginal ridge on both first and second mandibular molars?
distal marginal ridge
Which mandibular molar has a mesial root that is less wide faciolingually with a curved tip?
second
Which mandibular molar has a mesial root that is wide faciolingually with a blunt tip?
first
Which mandibular molar has a crown that is wider faciolingually than occlusocervically?
first
On both mandibular first and second molars, which root usually has a deep longitudinal depression on its mesial surface and an even deeper longitudinal depression on its distal depression?
mesial root
What do the depressions on the mesial and distal roots indicate?
likelihood of two root canals in the mesial root, one buccal and one lingual
In the proximal surface of both mandibular molars, which root is broader buccolingually so the distal root is not seen from the mesial view?
mesial
Which marginal ridge on both mandibular molars is more cervical?
distal marginal ridge
Which crown has the largest mesiodistal dimension of any tooth in the mouth?
mesiodistal crown
Which mandibular molar typically has five cusps?
first
Which mandibular molar typically has four cusps?
second
Which mandibular molar has mesial marginal ridges that are more occlusally located?
both first and second
Which mandibular molar has a more prominent buccal cervical ridge?
second
What is the shape of mandibular first molars?
pentagon
What is the shape of mandibular second molars?
rectangular
Which mandibular molar has more crown taper from buccal to lingual?
first
Which mandibular molar has less supplemental (secondary) grooves?
first
What is the shape of central grooves on second molars?
straight
What is the shape of central grooves on first molars?
zigzag from mesial to distal
Which mandibular molar has buccal and lingual grooves that intersect with a central groove like a +?
second
How many fossae are on both first and second mandibular molars and what are they?
three- central, smaller mesial triangular, and distal triangular
Which mandibular molar has a crown that taper narrower in the distal third?
first
Which cusps are the largest on both first and second molars on the occlusal surface?
mesiolingual and mesiobuccal
