Permanent Mandibular Premolars Flashcards
mandibular blank premolars are often congenitally missing
second
two common types of mandibular 2nd premolars
two cusp, three cusp
two cusp has one blank and one blank cusp
buccal, lingual
three cusp has blank buccal and blank lingual cusps
1, 2
generally, crown is much narrower on the lingual than on the facial except the second premolar with 2 lingual cusps where it can be as wide or wider than the blank
facial (buccal)
first premolar has a very blank lingual cusp
small
second premolar with 2 lingual cusps will have a larger blank
mesiolingual cusp ridge
in all teeth, facial HOC is in the blank third
cervical
first premolar lingual HOC is in the blank third
middle
first and second premolar tilt toward the blank side but not as much as first premolar
lingually
first premolar has a blank ridge because of blank ridges
transverse, triangular
second premolar does not have blank
transverse ridges
second molar three cusps means three blank
fossae
great amount of variation in blank
mandibular premolars