Mandibular 1st molar arch traits Flashcards Preview

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Flashcards in Mandibular 1st molar arch traits Deck (12):
1

What age does the tooth erupt?

6-7 years

2

at what age does the tooth erupt?

9-10 years

3

what 3 cusps are visible from the buccal view?

MB, DB, and Distal

4

What do the two grooves separate?

the buccal groove separates the MB and DB cusp
the distal groove separates the DB and D cusp

5

what are the contacts from the buccal view

mesial: junction middle and occlusal 1/3
distal: middle 1/3

6

how many roots?

2

7

where is the shallow depression located from the lingual view

from cervical line to bifurcation on lingual side

8

what are the heights of contour from the mesial view?

buccal: cervical 1.3
lingual: junction of middle and occlusal 1/3

9

From the distal view what can be seen and why?

the occlusal surface due to the lower marginal ridges

10

which root is larger? Mesial or Distal?

M>D

11

how many cusps are there?

5 and only tooth to have this
3 buccal and 2 lingual

12

What two variations can be present with this tooth

tuberculum sextum between ML and DL cusp which affects the lingual outline
Tuberculum intermedium which forms a distal triangular ridge of the ML cusp