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OSCE CRAM > Endo Instruments + techniques + files > Flashcards

Endo Instruments + techniques + files Flashcards

1
Q

Name the different endo motions

A
  1. Filing
  2. Envelope of motion
  3. Watch winding
  4. Balanced force
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2
Q

Filing technique

A

1/4 to 1/2 clockwise

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3
Q

Watchwinding technique

A

Back and forth
30 - 60 degrees

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4
Q

Envelope of motion technique

A

360 degrees

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5
Q

Balanced force technique

A

1/4 turn clockwise
1/2 turn counterclockwise

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6
Q

Use of barbed broach

A

Extirpation

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7
Q

Use of Hedstroem file

A

Remove GP or fractured instruments

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8
Q

What material are K files made from?

A

Stainless Steel

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9
Q

mm for cutting flute of K files

A

16mm

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10
Q

What material are ProTaper files made from?

A

Nickel Titanium

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11
Q

Advantages of NiTi files vs SS

A

Superelasticity
Greater taper
Increased cutting efficiency
Increased flexibility

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12
Q

Disadvantages of NiTi files vs SS

A

Instrument fracture
Expense
Access for posteriors

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13
Q

Reasons for instrument separation (2)

A

Torsional stress
Flexural stress

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14
Q

Steps for Protaper hand files (NiTi)

A

Access
10k 2/3rds EWL (balanced force)
CWL with EAL
10k CWL (balanced force)
15k CWL
S1 - Coronal 3rd
S2 - Mid 3rd
SX - Auxiliary file open up orifice
F1
F2

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15
Q

Steps for Modified Double Flare - GG+K files

A

Access
10k 2/3rds EWL
GG4 2/3rds
GG3 2/3rds
GG2 2/3rds
CWL with EAL
15k CWL
20k CWL
25k CWL
30k until file binds, then take 2 next file sizes up to CWL to create apical stop + decide MAF

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16
Q

Stepback technique

A

1 size larger than MAF -1mm CWL
40k - 23mm
45k - 22mm
50k - 21mm

17
Q

How do we decide what file of RECIPROC to use?

A

R25 - narrow/invisible on PA (20K not passive to WL)
R40 - medium (20K passive to WL)
R50 - large (30k passive to WL)

18
Q

RECIPROC steps

A

Access
10k 2/3rds EWL
15k 2/3rds EWL
R25 2/3rds EWL
CWL with EAL
R25 to CWL

19
Q

Maxillary roots + canals

A

Central - 1 - 1
Lateral - 1 - 1
Canine - 1 - 1
1st premolar - 2/3 - 2
2nd premolar - 1/3 - 1
First molar - 4 - 3
Second molar - 3 - 3

20
Q

Mandibular roots + canals

A

Central - 1- 1
Lateral - 1 - 1
Canine - 1- 1
1st premolar - 1 -1
2nd premolar - 1 -1
First molar - 2/3 - 3
Second molar - 2 - 3

OSCE CRAM (40 decks)

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