Week 1: Access and root canal location Flashcards
Which teeth fail the most following RCT?
- Upper first molars
- Lower incisors
- Lower canines
- Lower first premolars
- Lower first molars
- C shaped molars
Which canal is often missed in upper first molars
The second canal in the media buccal cusp (MB2)
So the end up only finding 3 not 4
Why might RCT usually fail in lower incisors?
As in 30-40% of them there’s lingual canal that is missed or can be inaccessible
Why might RCT in lower canines fail?
- Lingual canal is missed or inaccessible
2. The canals are usually longer and so it can be harder to prepare and obturate
Why might RCT in lower first premolars fail?
Difficult to locate lingual canal so can be missed
Why might RCT in lower first molars fail?
Distal roots usually can two canals and the second canal is usually missed
What is the average length of an upper first molar?
22mm
How many canals and roots are there in an upper first molar?
99% have 3 roots
Generally 4 canals
How many foramina are there in an upper first molar?
60% have 3
40% have 4
What is the average length of a lower incisors?
22mm
How many canals and roots are there in a lower incisor?
98% have 1 root
40% have 2 canals
Which canal is hardest to find in a lower incisor?
The 2nd lingual canal
How many foramina are there in a lower incisor?
90% have 1 foramen
10% have 2
What is the average length os a lower canine?
27.5mm
How may roots and canals are there in a lower canine?
95% have 1 root
Usually have 1 canal but 20% have 2