Lower 6

Question 1

draw out the lower 6 including the fissure patterns and the cusp shapes

Answer 1

The transverse fissure groove starts on the buccal surface and deepens across the occlusal surface. It ends as a groove on the lingual surface

There is also a fissure that runs mesiodistally which starts near the mesial marginal ridge, crosses the central pit and divides into two branches which pass onto either side of the distal cusp

Question 2

describe the features of the buccal aspect

Answer 2

The buccal surfaces are larger than the lingual surface

The buccal surface is lingually inclined

Proximal surfaces are convex - distal is rounder because of the distal cusp

The buccal surface has a PIT

Question 3

describe the pulp chamber

Answer 3

usually has 4 pulpal horns

chamber floor is roughly trapezoid or rhomboid

Most common root configuration includes one mesial root with two canals and one distal root with a single canal

Question 4

where is the mesiobuccal orifice usually found

Answer 4

under the mesiobuccal cusp

Question 5

where is the mesiolingual orifice commonly found

Answer 5

slightly lingual to the central groove

Question 6

what does the pulp look like

Answer 6