molar tooth anatomy

describe the outline form of a mandibular 1st molar

facial: trapezoidal

proximal: rhomboidal

occlusal: pentagonal (more likely) or hexagonal

compare cusp sizes of a mandibular 1st molar

MB > ML > DL > DB > D

compare cusp lengths of mandibular 1st molar

ML > DL > MB > DB > D

what grooves are present on the buccal surface of a mandibular 1st molar?

distobuccal, buccal/mesiobuccal groove with a pitwhat

what groove is present on the lingual surface of a mandibular 1st molar?

lingual groove

what root is longer on a mandibular 1st molar?

mesial root longer and wider than distal root

parts of all cusps on a mandibular 1st molar are visible from the ____ (distal/mesial) aspect

distal

what is the characteristic groove pattern of a mandibular 1st molar?

zig-zag

how many transverse ridges does a mandibular 1st molar have?

2

what are the interproximal heights of contour for a mandibular 1st molar?

mesial: middle/occlusal junction

distal: middle

what are the buccal and lingual heights of contour on a mandibular 1st molar?

buccal: cervical

lingual: middle

a mandibular 1st molar has ___ cusps

5

a mandibular 2nd molar has ___ cusps

4

compare the roots of a mandibular 1st and 2nd molar

1st: wider root spread, more curved

2nd: less root spread, straighter

what is the characteristic groove pattern of a mandibular 2nd molar?

“+”

describe the outline form of a mandibular 2nd molar

facial: trap, proximal: rhomboidal, occlusal: rectangular

what groove is present on the buccal aspect of a mandibular 2nd molar?

buccal groove between MB and DB cusps

parts of all cusps are visible from the ___ aspect of a mandibular 2nd molar

distal

compare the cusp sizes of a mandibular 2nd molar

MB = DB = ML = DL

compare the cusp lengths of a mandibular 2nd molar

ML > DL > MB > DB

what are the interproximal HOC on a mandibular 2nd molar

mesial: middle/occlusal junction

distal: middle

what are the buccal and lingual HOCs for mandibular 2nd molar

buccal: cervical

lingual: middle