MAXILLARY Second Premolars

When are maxillary second premolars initially calcified

2-2.5 years

When do maxillary second premolars erupt

10-12 years

When are roots completed for maxillary second premolars

12-14 years

What are the universal identification system numbers for maxillary second premolars

#4 and #13

What universal identification system number is the right maxillary second premolar

#4

What is the universal identification system number for the left maxillary second premolar

#13

How does the buccal cusp on the maxillary second premolar differ from the maxillary first premolar

second premolar buccal cusp is:

- not as long as the first premolar

- not as pointed as the first premolar (more blunt)

Are the general anatomical features more or less pronounced on the maxillary second premolar

less pronounced

How does the lingual cusp on the maxillary second premolar differ from the maxillary first premolar

maxillary second premolar has almost equal in length buccal and lingual cusps

How is the width of the lingual surface described as on maxillary second premolars

almost equal to the buccal surface

How does the mesial surface on maxillary second premolars differ from maxillary first premolars

- NO mesial marginal groove

- NO mesial concavity on the crown

How are the mesial surfaces similar on the maxillary first and second premolars

- developmental depression present on the root

- cervical line similar

- crest of curvature similar

- contact area similar

How is the developmental depression described as on the distal surface of maxillary second premolars

deeper developmental depression on the root surface

How does the cervical line on the distal surface compare to the mesial surface of maxillary second premolars

less curved cervical line on the distal surface compared to the mesial surface

How is the shape of the occlusal surface described on maxillary second premolars

tends to be more oval shaped

How are the buccal and lingual cusps described as on maxillary second premolars

equal in width

How many fossae/pits are there on maxillary second premolars

2 fossae and 2 pits

What are the fossae present on maxillary second premolars

mesial (triangular) fossa and distal (triangular) fossa

What are the pits present on the maxillary second premolars

mesial and distal pits

How are the grooves different on the maxillary second premolars than the maxillary first premolars

- less distinct on maxillary second premolars

- shorter grooves on the maxillary second premolars

- shallower grooves on maxillary second premolars

- more supplementary grooves on maxillary second premolars

How many root(s) are there on maxillary second premolars

1

Are there root depressions on maxillary second premolars

yes