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D3 Summer > Root Camp Lecture 8 - Obturation > Flashcards

Root Camp Lecture 8 - Obturation Flashcards

(53 cards)

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1
Q

3D filling of root canal w/ inert or biocompatible materials intended to seal off root canal from bacterial irritants and stimulate repair of PA tissues

A

Obturation

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2
Q

Aseptic care, execution of atraumatic techniques, and careful biomechanical instrumentation will be ineffective if the __________ is defective

A

filling

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3
Q

Obturation helps deter the penetration and stagnation of apical tissue _________

A

fluids

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4
Q

Obturation helps deter reinfection of the canal by ______________ that resisted canal instrumentation

A

microorganisms

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5
Q

Obturation stimulates/allows the repair of _________ ____________

A

PA tissues

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6
Q

What are the 4 essential conditions for canal obturation?

A
  1. Instrumentation is complete
  2. No pain (spontaneous or provoked)
  3. Canal is not draining, has minimal moisture
  4. Retention of temporary restoration
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7
Q

T/F: Level of obturation is the same as WL

A

True

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8
Q

Measured by full length (FL) - 1 mm

A

Obturation

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9
Q

What do you need to remove intracanal medication?

A

Irrigation
Small file < MAF
MAF

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10
Q

Removing the smear layer increases the chances of filling ___________ canals

A

lateral

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11
Q

Filling materials must be _________ or present good tissue tolerance

A

biocompatible

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12
Q

Filling materials must be ___________

A

bacteriostatic

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13
Q

Filling materials must be _____________ when accidentally extravasated

A

reabsorable

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14
Q

Filling materials must not provoke an __________ response

A

immune

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15
Q

Filling materials must be ________ or easy to sterilize

A

sterile

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16
Q

Filling materials must be easy to handle and insert into canals, and have adequate __________ ________

A

working time

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17
Q

Filling materials must provide a good _________ seal

A

apical

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18
Q

Filling materials must have good adaptation to canal ________

A

walls

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19
Q

Filling materials must have adhesion to ________

A

dentin

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20
Q

Filling materials must be dimensionally ______, and cannot undergo ______________ inside the canal

A

stable; solubilization

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21
Q

Filling materials must be __________ and __________ to tissue fluids

A

insoluble; impermeable

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22
Q

Filling materials must be _________ on X-rays

23
Q

Filling materials must not _______ teeth, and you must be able to remove with minimal effort for post space or retreatment when needed

24
Q

What are the 2 types of filling materials?

Study These Flashcards
A

Solids
Plastics

25
Which filling materials are solids?
Gutta percha Resin Silver
26
Which filling materials are plastics?
Pastes Sealers
27
What is the main component of gutta percha?
Zinc oxide
28
What are the following advantages for? Can be compacted Can be plasticized w/ heat or solvents Inert and non-allergenic Dimensionally stable (as long as it is not plasticized) Causes minimal color changes to dental crown (must be removed from clinical crown) Radiopaque Easily removed when needed
Gutta percha
29
What are the following disadvantages for? Little stiffness Does not adhere to root dentin Can be displaced under pressure If plasticized, contracts when it cools or after solvent volatilizes
Gutta percha
30
What is the composition of gutta percha (from highest to lowest %) (6)
Zinc oxide Refined gutta percha Resin Barium Sulfate Pigment Plasticizer
31
Which sealer? Zinc oxide + eugenol Good sealing Good radiopacity Difficult to handle Cytotoxic
Grossman sealer
32
Which sealer? CaOH Poor sealing Weak radiopacity Easy to handle Bioactive
Sealapex
33
Which sealer? Resin Excellent sealing Good radiopacity Easy to handle Not bioactive
AH-plus
34
Which sealer? Tricalcium silicate Excellent biocompatibility Easy to handle Ready to use Has solubility Bioactive
AH-plus bioceramic
35
Sealers seal the space btwn the dentinal wall and the obturating core __________
interface
36
Sealers fill voids and irregularities in the root canal, as well as _________ and ____________ canals
lateral; accessory
37
Sealers fill spaces btwn gutta percha points used in ________ _____________
lateral condensation
38
Sealers serve as _____________ during obturation process
lubricants
39
Which condensation technique? Most used Simple Good results/predictability Low cost
Lateral condensation
40
The presence of what can alter the sealing ability of sealers?
Moisture
41
You should select a master gutta percha point identical to your ______. It must go until the WL with __________
MAF; tug-back
42
How do you disinfect gutta percha points?
Leave them in 3.5% NaOCl for 1 min
43
If your gutta percha will not go to WL, what should you do?
Select another one of the same size Make sure MAF is going to correct WL Re-instrument with MAF to remove debris
44
This instrument should reach within 2 mm of WL w/o binding on canal walls to avoid stress on tooth structure
Finger spreader
45
This instrument should be compatible in diameter and taper w/ accessory points
Finger spreader
46
T/F: Do NOT use scissors to cut gutta percha. Must use a blade
True
47
After filling w/ gutta percha and take an X-Ray, what 5 things are you looking for?
Homogeneity RL areas Empty spaces Apical extension Lateral extension
48
What machine is used to sear off accessory points at the canal orifice?
Touch'n heat gutta percha plugger
49
What instrument is used to sear off accessory points at the canal orifice?
Plastic instrument (glick #1)
50
What instrument is used to pack the remaining gutta percha down to below the CEJ w/ the plugger?
Endo pluggers (5-7 or 9-11)
51
What is used to removed any residual sealer in the pulp chamber?
Alcohol-saturated cotton pellet
52
The __________ _____________ is as important as apical sealing
temporary restoration
53
Which gutta percha technique? Used for: B canals of maxillary molars M canals of mandibular molars Upper premolars w/ 2 canals
Single cone technique

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