Mandibular Molars Flashcards
how many cusps does the mandibular 1st molar have
5 cusps
how many cusps does the mandibular 2nd molar have
4 cusps
are mandibular molars greater MD or BL
MD
what is the shape of the mandibular first molar from the buccal aspect
trapezoidal
how many cusps are visible from the buccal aspect
all 5 cusps
describe the MB developmental groove of the mandibular 1st molar
MB developmental groove: shorter and terminates in middle third of tooth
describe the DB developmental groove of the mandibular 1st molar
terminates in cervical 1/3
where are the mesial and distal heights of contour of the mandibular 1st molar
mesial: middle
distal: middle
what is the bifurcation level from the buccal aspect of the mandibular 1st molar
3 mm
where are the developmental depressions on the roots of the mandibular 1st molar
mesial and distal aspects and buccally
what cusps are visible from the lingual aspect on the mandibular 1st molar
ML, DL, and distal
what is the level of bifurcation lingually of the mandibular 1st molar
4 mm
what is the bifurcation of the mandibular 1st molar lingually in line with
the lingual developmental groove
what is the shape of the mandibular 1st molar mesially
rhomboidal
where is the buccal height of contour on the mandibular 1st molar
cervical 1/3 on the buccal cervical ridge
what is the special relationship of the crown to the root axis in mandibular molars and premoalrs
crown has a lingual tilt to the root axis
where is the lingual height of contour of the mandibular 1st molar
middle 1/3
which aspect is the cervical line higher: lingually or buccaly
lingually
where is root apex in relation to the MB cusp from mesial aspect of the mandibular 1st molar
in line
what depressions are there on the mandibular 1st molar roots
mesial and distal developmental depressions
what is the occlusal shape of the mandibular 1st molar
hexagonal
what are the major and minor fossae of the mandibular 1st molar
major: central fossa
minor: mesial triangular and distal triangular fossa
what are the grooves of the occlusal view of the mandibular 1st molar
-central developmental groove
- mesiobuccal developmental groove
- distobuccal developmental groove
-lingual developmental groove
what are the boundaries of the central fossa of the mandibular 1st molar
-distal slope of the MB cusp
-mesial and distal slopes of the DB cusp
- mesial slope of the D cusp
- distal slope of the ML cusp
- mesial slope of the DL cusp
-triangular ridges of the MB,D,DL, and ML cusps
how many cusps are visible from the buccal aspect of the mandibular 2nd molar
all 4
where are the mesial and distal contacts of the mandibular 2nd molar
middle 1/3
where is the distal contact of the mandibular 2nd molar
middle third, centered BL
what is the shape of the occlusal aspect of the mandibular 2nd molar
rectangular
describe the shape mandibular 3rd molar crowns? maxillary 3rd molar crowns?
mandibular are oversized
maxillary are undersized
how many cusps do the mandibular 3rd molars have
2 cusps
