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Endodoncia I > Endo II P2 > Flashcards

Endo II P2 Flashcards

1
Q

3 essential parts for endo

A

Preparation
Irrigation
Obturation

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2
Q

Endo isntruments for preparation

A

Manual
Rotators

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3
Q

Manual instruments
Length

A

21
25
Or 31 mm

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4
Q

Manual instruments
Accessory files

A

06 rosa
08 gris
10 morada

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5
Q

Manual instruments
First series

A

15 blanca
20 amarillo
25 rojo
30 azul
35 verde
40 negro

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6
Q

Manual
Second series

A

45 blanca
50 amarillo
55 rojo
60 azul
70 verde
80 negro

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7
Q

Manual
Third series

A

90 blanca
100 amarillo
110 rojo
120 azul
130 verde
140 negro

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8
Q

Color
RGMBAmRAVN

A

Pink
Grey
Purple
White
Yellow
Red
Blue
Green
Black

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9
Q

They are manufactured twistin 0.02 taper SQUARE stainless steel wire
Most common

A

K files
Flexo file

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10
Q

Single helix teardrop cross-sectional shape

A

H files

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11
Q

The cylindrical central part of the file, the circumference of which is outlined and bordered by the depth of the flutes

A

Core

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12
Q

The groove in the working surface of an instrument used to collect debris (soft tissue and dentine chips removed from the canal walls). Its depth, width, and surface aspect can vary according to the particular instrument

A

Flute

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13
Q

The area with the greatest diameter that follows the groove

A

Cutting or leading edge or blade:

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14
Q

The distance between a point on the leading edge and the corresponding point on the adjacent leading edge along the working surface. The smaller the tighter the spirals and the greater the helix angle. Most files have a variable pitch that changes along the active surface

A

Pitch:

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15
Q

formed by the cutting edge (the blade) and the long axis of the file. It helps augur debris from the flutes. Can be fixed or can change along the active portion; in the latter case, we speak of a ‘variable pitch’

A

Helix angle:

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16
Q

Manual techniques

A

Step back
Step Down
Crown-down

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17
Q

This techniques relies on stepwise reduction of WL for larger files, typically in 0.5 to 1 mm steps, resulting in flared shapes with 0.05 and 0.10 mm tapering, respectively

Introduced by Clem and Weine in 1960

A

Step back

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18
Q

In what consiste the step back T?

A
  • acces the chamber, flood the chamber with irrigant
  • establish the workin length, with file 10
  • file 15
  • remove instrument n irrigate
  • gentle watch-winding motion
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19
Q

Who is called the final file that goes to the full working length
In step back T

A

MAF

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20
Q

How to break up apical debris to be easily washed away with the irrigant

A

Recapitulate the canal with the previous smaller size file

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21
Q

The gates Glidden is useful for…

A

Enlarging the canal to obtain cleaner canal

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22
Q

Step back avantages

A

More flaring of the canal at the coronal part with proper apical stop

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23
Q

Step back
Disadvantages

A
  1. Difficult to irrigate apical region.
  2. Alteration of the WL after canal flaring.
  3. More chances of pushing debris periapically.
  4. Time consuming.
  5. Increased chances of iatrogenic errors for example ledge formation in curved canals.
  6. Difficult to penetrate instruments in the canal.
  7. More chances of instrument fracture.
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24
Q

This technique was developed to shape the coronal part (coronal pre-flaring) of the canal before instrumentation of the apical part.

A

Step down

25
Q

Step down objetives

A

1- To permit straight access to the apical region of the canal by eliminating coronal interference
2- To remove the bulk of necrotic tissue and microorganisms before apical shaping to minimize extruded debris through the apical foramen during instrumentation.
3- To allow deeper penetration of irrigant deeply into the apical part of the canal. In addition, it provide coronal escape way for debris extrusion from the apex.
4- The WL is less likely to change with less chance of zipping near the apical constriction.

26
Q

In what consist the step down T?

A
  • prep of 2/3 of canal with files 15-25
  • circumferential motion
  • increase coronal flaring with gates glidden 2-4 in order and 1mm shorter between each file
  • prepare apical seat with k-files 15-25
  • frequent recapitulation with a 25 k-file to prevent blockage
27
Q

Step down T
Disadvantages

A

Is only time consuming

28
Q

Technique based on moving from the crown towards the apical portion of the canal.

A

Crown down T

29
Q

In what consist crown down t?

A

gates glidden or nickel-titanium rotary instrument. After put file 10,15 … to apical foramen, from the biggest to the smallest. between instrument check the working length
toda la intrumentacion rotatoria sigue esta tecnica

30
Q

Crown down T
Advantages

A

?

31
Q

Root canals are rarely ____

A

Conical or straight
They have lateral canals, apical deltas, fins, webs and transverse anastomoses that are part of the inherent variation in root canal morphology

32
Q

Henry Drysdale Dakin
1970
Introduced the use of..

A

Dilute solution of sodium hypochlorite
To treat wounds in WW1

33
Q

In 1941 shown that chlorinate soda solution …

A

Had the ability to dissolve human pulp in less than two hours

34
Q

In order to irrigation be effective the needle need to be..

A

Placed close to the apical region
Smaller gauge needle

35
Q

Contemporary research show effective irrigation consist in:

A
  • properties itself
  • temp
  • agitation
  • concentration
  • time of exposure
  • surface modifiers

It is multifactorial

36
Q

Washing a body cavity or wound with water or a medicated liquid

A

Irrigation

37
Q

Agent that destroys or inhibits the activity of microorganisms that cause disease

A

Desinfectante

38
Q

Ideal irrigant:
(15)

A
  • effective disinfectant
  • Not irritating to periapical tissues
  • Remain stable in solution
  • Have a prolonged antimicrobial effect
  • Be active in the presence of blood, serum and protein derivatives of tissues.
  • Do not interfere with tissue repair
  • Have low surface tension
  • Do not stain teeth
  • Can be inactivated in culture medium
  • Do not induce immune responses
  • Remove smear layer
  • Have no adverse effects on the physical properties of dentin
  • Do not interfere with the sealing ability of the cement
  • Easy manipulation
  • Economic
39
Q

Is how the flow of irrigants penetrates and is exchanged within the root canal system, as well as the forces produced by said irrigants.

A

Hydrodynamics of irrigation

40
Q

Manual techniques of irrigation

A

Syringe (passive)
Manually activated
Brushes

41
Q

Assisted techniques of irrigation

A

Rotatory brushes
Continuous irrigation during rotatory instrumentation
Sonic irrigation
Ultrasonic irrigation
Alternating pressure irrigation
Laser and light activated irrigation

42
Q

This technique consists of depositing the irrigant into the root canal system through syringes/needles of variable diameter, passively or with agitation.

Volume + speed

A

Manual Irr with syringe

43
Q

Irrigation system for vapor lock
Where The irrigant reaches crevices and mechanically intact areas more effectively if it is agitated within the canal.

A

Manually activated Irrigation

44
Q

What is vapor lock?

A

The canal system enables air trapping, which is favored by the formation of ammonium and carbon dioxide vapors produced by the decomposition of organic matter carried out by the irrigant.

45
Q

Which is more effective?
Syringe or ultrasonic

A

Ultrasonic

46
Q

Irrigant which use the phenomenon of acoustic micro-streaming

A

Sonic and ultrasonic irr

47
Q

Irrigation which Mechanism of action is based on the generation of a secondary cavitation effect with expansion and subsequent implosion of the liquids.

A

Láser activated irrigation

48
Q

What is pips?

A

Photon induced photoacoustic streaming

49
Q

Who does laser-activated irrigation works?

A

uses very low levels of energy to generate a photoacoustic shock wave, which moves irrigants through the entire root system.
Expels the remains of pulp tissue and dentinal debris out of the canals.

50
Q

Who standardized the files

A

Consejo de endo
ISO classification

51
Q

What info is found on the mango (file)

A

Diameter, color, geography

52
Q

Parts of the file

A

Core
Flute
Cutting/leading
Edge/blade
Pitch
Helix angle

53
Q

Técnica donde el engrosamiento de la corona se hace al final

A

Step back T

54
Q

Technique that doesn’t reduce length at the end

A

Crown down T

55
Q

What is EDTA?

A

Ethylene diamine tetra acetic acid

56
Q

Solution that dissolves inorganic material making the inorganic parts of the dentin to have micro-holes so the irrigant and obturation material can penetrate

A

EDTA

57
Q

Qué no se combina?

A

Hipoclorito + clorhexidina = paracloroanilina (cancerígeno)

58
Q

How much liquid do we need to irrigate with hipoclorito

A

1 ml

Endodoncia I (11 decks)

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