Mandibular first premolar Flashcards
Which is wider, buccolabial or mesiodistal?
Neither, they are equally wide.
Describe the shape of the occlusal outline.
Diamond shaped occlusal outline
Which cusp is larger? Buccal or lingual?
Buccal cusp, lingual cusp is so small that occlusal anatomy can be seen from the lingual surface
What line is more rounded? Distolingual or mesiolingual?
Distolingual, mesiolingual is flat, which makes the mesial surface narrow.
What is the name of the groove that starts at the mesial pit, crosses over the mesial marginal ridge and into the mesiolingual line angle?
Mesiolingual groove
Distal and mesial HOC
Between middle and occlusal third (distal closer to cervical line)
It is the only posterior tooth, that has a mesial marginal ridge closer to the cervical line than the distal marginal ridge. T/F
True
Buccal HOC
between middle and cervical third
Lingual
Middle third, close to lingual cusp apex
Does the tooth have a mesial rooth groove?
Yes, very prominent
What are the two pits referred to as and what tooth do they distinguish this tooth from?
Snake eyes, mesial and distal pits that will distinguish this tooth from the mandibular canines. The pits are the apices of the mesial and distal fossa
What two ridges form the transverse ridge?
The buccal and lingual triangluar ridges, only permanent tooth with tranverse ridge
What are the grooves that divide into buccal lobes and what is a relatively prominent structure on the cental lobe that was also present on the maxillary first premolar?
Developmental grooves and the buccal ridge is prominent on the central lobe
