Endo access 2 Flashcards
HOw long does the pulpal anesthesia last?
30-45 min
______ is arguably the WORST error you can make at access
Perforation
All Posterior Access should ____ to the _______
FLARE to the occlusal
______ is used for the following:
VISABILITY
RETENTION of TEMP.
SEAL
Prevent salivary contamination
Flaring to the occlusal
How many canals does a mand molar usually have?
3
What percentae of the time does a mand molar have 4 canals?
30%
What is the most common missed canal in mand molar?
DL
If there is one distal canal, where is it in relation to the 2 mesial canals?
Centered between them
What is the outline for mand molars?
Trapezoidal
What portion of the outline is more wide on the mand molar?
Mesial
The ________ tooth contains 3 or more canals
associated by an irregular network of thread-like canals
and areas that are variable in size, shape and complexity
and are extremely difficult to find and worse to
instrument. These are largely seen in 2nd molars.
“C-Shaped Canal”
As you go more _______ in the mouth, the root canal treatment becomes more difficult
Distal
What range of percentages of the time does a c shaped canal or mid mesial canal occur on the mand molars?
2-8%
Which molars are harder to get fully numb?
Mand molars
What percentage of max molars have MB2 canal?
95%
What percentage of the time will you be able to find the MB2 canal without perforating the roots?
80-85%
What canal is most responsible for failed Max molar RCT?
MB2
What shape should the access for max molars be?
Trigangular
Apex to palatal
Base to buccal
What 2 scenarios in a max molar root canal where the MB2 is not found lead to a successful RCT?
Type 2 canal
Type 3 canal w/ vital MB2 pulp
What scenario in a max molar root canal where the MB2 is not found lead to a failed RCT?
Type 3 canal w/ necrotic pulp
What is the most commonly retreated RCT tooth?
Max 1st molar
What bur should be used for access of the molars?
4 round
