mandibular 2nd molars Flashcards
When do mandibular 2nd molars erupt?
11–12 years
When is root completion for mandibular 2nd molars?
14–15 years
How do the crown dimensions of mandibular 2nd molars compare to mandibular 1st molars?
The crown dimensions are smaller than those of the 1st molars
How many cusps do mandibular 2nd molars have?
Four
Does the mandibular 2nd molars have a prominent facial ridge on the mesiobuccal cusp
Yes
What are the tooth numbers for mandibular 2nd molars?
18, #31
What is the mesial outline shape of mandibular 2nd molars from the buccal view?
Nearly straight
What is the shape of the distal outline of mandibular 2nd molars from the buccal view?
Convex
How many developmental buccal grooves are on mandibular 2nd molars?
1
Where is the mesialcontact areas of mandibular 2nd molars located?
Junction of the occlusal and middle thirds
Where is the distal contact areas of mandibular 2nd molars located?
middle third
How do the cusp tips of mandibular 2nd molars compare to those of the 1st molars from the lingual view?
Sharper
How do the buccal and lingual surfaces of mandibular 2nd molars compare in width?
They are more equal in width compared to the 1st mandibular molar
How do the roots of mandibular 2nd molars compare to those of the 1st molars?
The roots are straighter than those of the 1st molar.
How do the roots of mandibular 2nd molars differ from those of the 1st molar?
They have more variations, with 2–3 root canals.