Mandibular 1st Pre-molar Arch Traits Flashcards Preview

Tooth Morphology > Mandibular 1st Pre-molar Arch Traits > Flashcards

Flashcards in Mandibular 1st Pre-molar Arch Traits Deck (18):
1

Do the cusps have any resemblance?

no

2

Mesial-Distal width compared to Buccal-Lingual

they are nearly equal

3

which direction are the buccal profiles pulled?

lingually

4

root number?

generally one

5

What age do they erupt?

10-12 years

6

what age is the root completed?

12-13 years

7

Which pre-molar is larger?

the 1st premolar is smaller than the second

8

What shape is the buccal cusp viewed from the buccal

sharp like a canine

9

Mesial and Distal contacts from buccal view

both in middle 1/3 but distal is more cervically placed

10

Is the lingual cusp functional?

no

11

What is the one give away that it is a mandibular 1st premolar from the lingual view?

the mesial-lingual developmental groove.
only tooth with it

12

size of root from lingual view?

tapers and relatively short

13

CEJ shape from mesial view

level

14

From the distal is there a developmental groove?

no but there may have small distal marginal groove

15

Heights of contour from distal view

buccal-cervical 1/3
lingual-cervical 1/3

16

From the occlusal view is the mesial half or distal half bigger

mesial 1/2>distal 1/2

17

What is another name for this tooth?

transitional tooth

18

What creates a notch in the outline from the occlusal view?

The mesial-lingual developmental groove