Flashcards in Endo-Access, Cleaning, Shaping, Obturating Deck (71)
What is the material for removing the smear layer?
What is possibly the most demanding part of a root canal?
Access: the walls should ______ toward the occlusal and try to achieve ______ line access
What burs can we use to look for oraficies?
Back to anatomy I guess...What % of mand anteriors have 2 canals?
MB2 is ALWAYS ______ and _____ compared to MB1!!!
Palatal and MESIAL
More anatomy-what % of Maxillary molars have 4 canals?
What shape should your mand 1st PM have? What are my chances of finding a second canal?? (i experienced this first hand)
When accessing, make sure to remove ALL sources of _______
The pulp chamber of a tooth is always located in the _______ of the tooth at the level of the ______
The ORIFICES of the canals are ALWAYS located at the junction of the _____ chamber floor and the _______ chamber walls!
DARK floor....LIGHT walls
The orifices of canals are usually located at the ______ of the "dark" floor angle.
The orifices of the canals are SYMMETRICAL with respect to a line drawn in a _____-______ direction at the level of the _____
Mesio-Distal direction at the CEJ
The orifices of canals are _______ with respect to each other
There is 1.0 x 10^__ to 1.0x10^__ bacterial cells in the infected root canal, ______ instrumentation reduces the number 100-1000 fold
10 to the 2nd to 10 to the 8th
Purpose for IRRIGATION! Wetting the canal walls and flushing of ______ from the canal
Purpose for IRRIGATION! Destruction of ________
Purpose for IRRIGATION! Dissolution of ______ matter
Purpose for IRRIGATION! Removal of the ______ layer and softening of ______
Purpose for IRRIGATION! to clean mechanically ________ areas
ANTIMICROBIAL effects of Irrigants-________ introduced as an Endo tx by Coolidge in 1919.
ANTIMICROBIAL effects of Irrigants-NaOCl shows SUPERIOR ________ action
ANTIMICROBIAL effects of Irrigants-NO difference seen in efficacy between ___ and ___ %
0.5 and 5%
ANTIMICROBIAL effects of Irrigants- Copious irrigation with NaOCL in conjunction with mechanical instrumentation eliminated bacteria in ___% of cases in controlled studies
What size needle do we use to irrigate with?
YOU need to be VERY CAUTIOUS not to force irritants out the _____ of the root!
What are the two "appropriate" irrigants?
NaOCl & EDTA
Whats the typical [ ] of NaOCl used in dentistry?
5.25% or 2.6%
What are the two functions of NaOCl?
1.Anti-bacterial 2.Dissolves tissue