The document contains 16 multiple choice questions about the anatomical features and characteristics of the premolars. Some key points addressed in the questions include: - The number and shape of cusps on the lower first premolar - The shapes of the mesial and distal fossae on the upper first molar - Common developmental groove patterns on the lower second molar - Distinguishing features of the upper first and second premolars - Variations in root canal morphology and pulp chamber features between the different premolars

1. Unique Questions
1- The lower first premolar has:
a- Two well-developed functioning cusps, one buccal & one lingual.
b- A large pointed buccal cusp & a short nonfunctional lingual cusp.
c- Three well developed cusps one buccal & 2 lingual.
d- Four cusps two buccal & two lingual cusps
2-The mesial and distal fossae found on the occlusal surface of upper 4 are:
a- Triangular
b- Circular
c- The mesial is triangular and the distal is circular
d- The mesial is elongated and the distal is circular
3-The central developmental groove on the occlusal surface of the
lower 5 may be:
a- U shape.
b- Y shape.
c- H shape.
d- All of above
5- The lingual surface of the 3 cusp type lower 5 have:
a- A mesiolingual developmental groove.
b- A lingual developmental groove
c- A distolingual developmental depression
d- A mesiolingual developmental depression
6-The upper 5
differs from the upper 4
in which of the following character:
a- A shorter mesiobuccal cusp slope compared to the distal slope.
b- The absence of mesial marginal developmental groove.
c- Buccal & lingual cusps are equal in lengths
d-All of the above.
7- The mesial surface of the upper first premolar:
a- Is trapezoid in shape with the short of the uneven sides occ1sually and the long cervically.
c- Has a developmental depression cervical to the mesial contact area.
d- All the above.
8-When viewed from the occlusal aspect, which of the following help to identify upper 4 :

2. a- Presence of a distolingual cusp
b- A small indistinct lingual cusp.
c- Presence of mesial marginal groove
d-highly sloped distal marginal ridge.
9--Of the four premolars, which one is likely to have two root canals :
a- Mandibular first premolar
b- Mandibular second premolar
c- Maxillary first premolar
d- Maxillary second premolar
10-The term premolar is more appropriate than the term bicuspid because:
a- Most premolars demonstrate one cusp only.
b- Human premolars show a variation from 2 to 3 cusps.
c- Human premolars show a variation from 2 to 5 cusps.
d- The typical premolars will have 5 cusps.
11- On the lower first premolar which marginal ridge is higher
a- The mesial marginal ridge is higher
b- The distal marginal ridge is higher
c-The mesial and distal marginal ridges are at the same height
d- All of the above
12-Of the four premolars, which one is likely to have just one large pulp horn
a- Mandibular first premolar
b- Mandibular second premolar
c- Maxillary first premolar
d- Maxillary second premolar
13-What tooth is occasionally called a 'tricuspid'
a-upper first premolar
b-lower first molar
c-lower first premolar
d-lower second premolar
14- The occlusal surface of the upper second premolar has the following except:
a- Is oval in shape.
b- Has short central development groove.

3. c- Has a lot of supplemental grooves giving it wrinkled appearance.
15- The pulp chamber of the lower first premolar has two pulp horns one buccal and one lingual they are:
a- Equal.
b- The lingual pulp horn is more prominent.
c- The buccal pulp horn is more prominent.
d- Has no pulp horns.
16- The pulp chamber of a 3 cusp type lower second premolar has:
a- One buccal and two lingual pulp horns.
b- One lingual and two buccal pulp horns.
c- One buccal and one lingual pulp horn.
d-None of the above.
When viewed from the occlusal aspect, which of the following are differences in the crown of upper 5 as
compared to upper 4
A more rounded outlines.
A shorter central groove
c- More supplemental grooves
d- All of above