Mandibular 2nd Pre-molar Arch Traits Flashcards Preview

Tooth Morphology > Mandibular 2nd Pre-molar Arch Traits > Flashcards

Flashcards in Mandibular 2nd Pre-molar Arch Traits Deck (15):
1

at what age do they erupt?

11-12 years

2

at what age is the root completed?

12-14 years

3

what are the 2 forms and characteristics of them

1. Bicuspidate: has 2 cusps that are Buccal and Lingual
2. Tricuspidate: has 3 cusps that are Buccal, Mesial-Lingual, and Distal-Lingual

4

Heights of contour from buccal view

mesial: Junction of occlusal and middle 1/3
distal: middle 1/3

5

Which cusp is more developed from the lingual view?

the lingual cusp

6

Is there a developmental groove in the bicuspid?

no

7

order of size of the 3 cusps from tricuspid

B>ML>DL

8

number of roots?

one

9

how many cusps can be seen from the mesial view?

2 out of 3

10

From the mesial view why are you unable to see the DMR?

because there is a high MMR

11

From the distal view how many cusps can be seen?

all 3 because the DMR is relatively low

12

Height of Contour from distal view

buccal: cervical 1/3
Lingual: Middle 1/3

13

From the occlusal view, how are the proximal surfaces oriented?

parallel

14

What letter does the bicuspid groove create?

a H or U

15

what letter does the tricuspid groove create?

a Y