Mandibular 1st Premolars

Question 1

Prominent buccal ridge (well-developed middle buccal lobe)

Answer 1

Mandibular 1st Premolar

Question 2

ONLY premolar with mesiolingual developmental groove: demarcates mesial marginal ridge from the lingual lobe

Answer 2

Mandibular 1st Premolar

Question 3

ONLY tooth in which the mesial marginal ridge is at a LOWER level than the distal marginal ridge

Answer 3

Mandibular 1st Premolar

Question 4

Distance from CEJ to lingual cusp tip = 2/3 distance from CEJ to buccal cusp tip (occulsocervical height)

Answer 4

Mandibular 1st Premolar

Question 5

ONlY one with transverse ridge: formed by buccal and lingual triangular ridges; separates occlusal fossas

Answer 5

Mandibular 1st Premolar

Question 6

Buccual ridge bigger than lingual ridge

Answer 6

Mandibular 1st Premolar

Question 7

Distal occlusal fossa bigger than mesial occlusal fossa

Answer 7

Mandibular 1st Premolar

Question 8

Lingual cusp is small (may resemble canine cingulum)

Answer 8

Mandibular 1st Premolar

Question 9

Mesially, busccal cusp tip is centered over root: lingual cusp tip in line with lingual border of root

Answer 9

Mandibular 1st Premolar

Question 10

More developmental depressions or grooves on mesial side of root

Answer 10

Mandibular 1st Premolar

Question 11

Lingual height of contour is lingual to outline of root (overhangs the root trunk)

Answer 11

Mandibular 1st Premolar