Last Bits

Which type of premolar crown typically tilts lingually and distally?

Mandibular

On mandibular premolars, which cusp is longer?

Buccal cusp

Both maxillary premolars usually have root depressions on which surfaces?

Mesial and distal

How many roots does the maxillary 1st premolar usually have?

2

Which premolar crown has a concavity that continues onto the root surface?

Maxillary 1st premolar

In the maxillary 2nd premolar, which root depression is usually deeper?

Distal

What are the Universal numbers for the maxillary 1st premolars?

#5 and #12

What are the Universal numbers for the maxillary 2nd premolars?

#4 and #13

How can you determine whether a maxillary premolar is right or left when holding it?

By identifying which side the mesial marginal ridge groove is on

On the maxillary 1st premolar, what unique feature crosses the CEJ?

Mesial concavity that continues as a root surface depression

What is the function of marginal ridge grooves on maxillary premolars?

Serve as a spillway for food during mastication

In terms of buccal ridge prominence, how do the two maxillary premolars differ?

Buccal ridge more prominent on 1st PM, less on 2nd PM

What is a common variation in the mandibular 2nd premolar?

Two lingual cusps instead of one

In which third of the root are longitudinal depressions found on the maxillary 2nd premolar?

Middle third