Lecture 12 (11/14)

Question 1

we think of root canals as relatively simple but reality shows us:

Answer 1

much more than we imagine

Question 2

If we chemically remove the contents of the pulp pal system & introduce dye:

Answer 2

A far more complex anatomy is revealed

Question 3

______ fails to contact with a large portion of the hidden spaces which are filled with ____ (and ____)

Answer 3

Instrumentation; bacteria (and substrate)

Question 4

We MUST remove and destroy both the ____ and ____ to be successful

Answer 4

bacteria AND their substrate

Question 5

We can access only a percentage of the complex anatomy & “protected areas” by any ______. (___%)

Answer 5

instrumentation; 60-70%

Question 6

Our MAJOR weapons in endo:

Answer 6

Cleaning & shaping with NaOCl and intra-canal medicaments

Question 7

We clean & shape the canals with NaOCl..what is this?

Answer 7

8.3% sodium hypochlorite (bleach)

Question 8

When administering NaOCl, how should the tip of the needle be?

Answer 8

bent

Question 9

When administering NaOCl, you MUST NOT have tip of syringe beyond:

Answer 9

apical constriction

Question 10

When administering NaOCl, Do NOT allow tip to:

Answer 10

BIND in the canal

Question 11

When administering NaOCl, set the bend @

Answer 11

2mm short of WL

Question 12

What does NaOCl do to microorganisms and substrate? (2)

Answer 12

1. Kills micro-organisms on contact
2. Destroys & dissolves substrate

Question 13

What are all the effects of NaOCl when used inside the root canals: (5)

Answer 13

1. Disorganizes biofilm
2. Dilutes toxins in canal system
3. Disinfects RC system & instruments
4. Lubricates canals
5. Floats out debris

Question 14

When NaOCl breaks down, what do we have?

Answer 14

NaCl & H2O

Question 15

When does NaOCl break down?

Answer 15

1. in the bottle
2. In the tooth*

Question 16

NaCl and H2O are the broken down form of:

Answer 16

NaOCl

Question 17

NaOCl becomes inactive after ___ in the canal so it must be replenished every ___.

Answer 17

3-5 min; 3-5 min

Question 18

Its important to irrigate following each:

Answer 18

active instrument

Question 19

Following each active instrument; it is important to:

Answer 19

irrigate

Question 20

Dakin’s solution is often used for surface disinfection. It is ____% ____

Answer 20

0.25% NaOCl

Question 21

_____ is often used for surface disinfection. It is ____% NaOCl

Answer 21

Dakin’s Solution