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Endodontics 1 > Endo Disinfection > Flashcards

Endo Disinfection Flashcards

1
Q

What are the 2 things you must do to remove bacteria from root canals?

A

Shape and Irrigate

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2
Q

What are the 2 things irrigant must do?

A

Remove substrate

Kill bacteria/biofilm

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3
Q

We can access only _____ percentage of the
complex anatomy & “protected areas” by any
instrumentation.

A

60-70%

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4
Q

What concentration of NaOCl do we use?

A

8.3% NaOCl

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5
Q

How far should you keep the need from WL?

A

2 mm

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6
Q

How long should the NaOCl be in contact with the canals? What size should the canal be?

A

At least 30 minutes; #30

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7
Q

How often should the NaOCl be replenished?

A

3-5 mins

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8
Q

SHould you bind the needle in the canal

A

NEVER

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9
Q 
\_\_\_\_\_ kills micro-organisms on 
contact
 destroys & 
dissolves substrateDisorganizes Biofilm
Dilutes Toxins in canal system
Disinfects RC System & Instruments
Lubricates Canals
Floats out Debris
A

NaOCl

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10
Q

Typical case requires about
_____ cc. of NaOCl
as irrigant per visit

A

10-12

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11
Q

T/F: It is important to IRRIGATE
following each ACTIVE
INSTRUMENT

A

True

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12
Q

What does NaOCl break down into?

A

NaCl and H2O

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13
Q

When are the 2 times when NaOCl breaks down?

A

In the bottle

In the tooth

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14
Q

Dakin’s solution is often used
for surface disinfection. It is
_____ NaOCl

A

0.25%

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15
Q

8.3% NaOCl (Clorox) is _____
times STRONGER and MORE
TOXIC than Dakin’s solutino– also more effective!

A

33.2x

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16
Q

_____: gas accumulates at apex of teeth; hard to get irrigant thru this

A

Apical vapor lock

17
Q 
\_\_\_\_\_\_ means:
• Flood canal system with NaOCl 
• Do this EVERY 3-5 minutes
• Use a #10 file to WL (as necessary)
• Then move on with next active instrument
A

“Recapitulation”

18
Q 
Strong Oxidizer 
Powerful  Disinfectant 
Dissolves Necrotic Tissue 
  @low concentration  
Dissolves Living Tissue 
  @higher concentration  
Med. of CHOICE (Endodontics) 
Strong Oxidizer
Powerful  Disinfectant
DANGEROUS !
Extremely TOXIC
If Swallowed: Call Poison Center
     1-800-222-1222  KU Med.
Dental Dam must NOT Leak
EYES: Flush w/ water 15 min. 
Never forget Eye Protection and 
Never PASS anything over Face
A

Sodium Hypochlorite:

19
Q 
Immediate & Extreme pain for several days
 Ecchymosis
 Swelling
 Temporary disfigurement
 Court appearance ?
A

NaOCl incident

20
Q

T/F: You should
place your gloved hand under
the syringe as you remove it
from the tooth.

A

True: stains clothes

21
Q

• This device agitates irrigation solutions during endodontic
treatment. Evidence-based endodontics has shown that cavitation and acoustic streaming significantly improve debridement and the
disruption of the smear layer and biofilm.
!38
May be helpful: Especially in
difficult and unusual canal systems.
Does not diminish time of use for
NaOCl

A

Endo activator

22
Q

T/F: Endo Activator doesn’t reduce the overall time required
for effective irrigation of the canals

A

Trud

23
Q

________ is produced when we do any
mechanical shaping in dentin. It lies on the
surface of the dentinal tubules.
It is NOT removed by NaOCl and the SMEAR
LAYER occludes access to the Dentinal Tubules
so must be removed to complete the CLEANING
procedure before OBTURATION or when using
various Sealers and Cements.

A

The SMEAR LAYER

24
Q 
\_\_\_\_\_\_\_ (removes smear layer) is introduced to the 
canal system and allowed to work 
for 60 seconds. Then followed by 
8.3 % NaOCl to stop action of 
Ethylene Diamine Tetra-acetic Acid
A

17% EDTA

25
Q

Medications placed within the canal system between appointments. Intended
to increase local anti- microbial action and to further decrease the
microbial challenge within the RC system.

A

intracanal medications

26
Q

_____: near universal acceptance as the intracanal medication of choice- pH
between 11 and 12- Discourages most microbial growth
- Long lasting (effective over extended periods)
- No reported allergic responses
- Easy to apply & remove as a paste- Available in clinic as “Ultracal”

A

CaOH:

27
Q 
10ºC/50ºF
4 MINUTES
COLD-INDUCED  
NEURAPRAXIA
Antiedema effect
Strong Anti inflammatory effect
A

Cold saline solution

28
Q

T/F: All potential “Portals of Entry/Exit”
must therefore be sealed creating a Dense Liquid
Tight (Hermetic) Seal “OBTURATION” and FINAL
RESTORATION to PREVENT LEAKAGE

A

True

Endodontics 1 (13 decks)

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