Mandibular 1st Pre-molar Arch Traits Flashcards
Do the cusps have any resemblance?
no
Mesial-Distal width compared to Buccal-Lingual
they are nearly equal
which direction are the buccal profiles pulled?
lingually
root number?
generally one
What age do they erupt?
10-12 years
what age is the root completed?
12-13 years
Which pre-molar is larger?
the 1st premolar is smaller than the second
What shape is the buccal cusp viewed from the buccal
sharp like a canine
Mesial and Distal contacts from buccal view
both in middle 1/3 but distal is more cervically placed
Is the lingual cusp functional?
no
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
size of root from lingual view?
tapers and relatively short
CEJ shape from mesial view
level
From the distal is there a developmental groove?
no but there may have small distal marginal groove
Heights of contour from distal view
buccal-cervical 1/3
lingual-cervical 1/3
