Large Taper Files

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• Large Taper Files

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Large Taper Files
Engine-driven files
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Hand-Using Large Taper Files
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A, Lateral view. (SEM, 50.) B, Cross section.
(SEM, 200.)
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Large Taper File Advantages

• Easier
• Only one instrument sequence whatever the canal
  shape
• An easy to remember protocol (color-coded)
• Faster
• Only 3 instruments needed in most cases
• High cutting power

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Large Taper File Advantages

• More efficient
• increased apical taper for better canal cleaning
• Better debris removal due to the unique ltMultiple
  Tapergt design of these instruments
• Safer
• Guiding tip with rounded end to minimize canal
  deviations
• These instruments are also available in manual
  version to treat anatomically difficult cases or
  for clinicians who prefer to use hand files for
  tactile control reasons

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How to prepare root canal by using Large Taper
Files ?
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D2
M2
M1
M3
D1
DX
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1. Prepare a straight-line access cavity with no
restrictions in the entry path into the chamber
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2. Establish proper access and a glide path with
No. 10 and No. 15 steel files to the working
lengthor the apical constriction exit.
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3. Begin shaping with the D1 using multiple,
passive-pressure passes. Go no deeper than 1/3
of the estimated canal length. Irrigate and
recapitulate with a No. 10 hand file,
establishing patency to full working length.
With D1, extend the preparation to full
working length.
NaClO EDTA
D1 shaping Irrigation
recapitulation
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4. Brush with the DX to improve
thestraight-line access in short teeth or to
relocate canal access away from furcation in
posterior teeth.
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5. D2 is now used to full working
length.Irrigate, recapitulate
NaClO EDTA
D2 shaping Irrigation
recapitulate
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• 6. With M1, passively extend the preparation to
  within 0.5 mm of the working length.
• Withdraw after one second! And only one second!
• The M1 has a tip size of 0.20 mm, and if a No. 20
  hand instrument is found to be snug, the
  preparation is finished.

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• 7. If the M1 and the No. 20 hand file are
  loose, continue the preparation with the M2,
  which is 0.25 mm diameter at the tip.
• If the M2 and the No. 25 hand file are loose,
  continue the preparation with the M3, which is
  0.30 mm diameter at the tip.

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• Frequent irrigation and file cleansing are
  imperative
• irrigation and recapitulation!

5.25NaClO 17EDTA irrigation
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The data of engine-driven Large Taper files
File Speed(rpm) Torque(N cm)
DX 300 3.0
D1 250 3.0
D2 250 1.0
M1 250 1.6
M2 250 2.0
M3 250 2.0
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How to better use Large Taper Files

• Prepare a straight-line access cavity with no
  restrictions in the entry path into the chamber.
• Fill the access cavity with Sod Hypochlorite.
• Establish a smooth glide path with No. 10 and
  No.15 stainless steel hand files.
• Use maximum magnification to observe the movement
  of the rotary instrument. Seeing rotary apical
  movement is safer than simply feeling such
  movement.

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How to better use Large Taper Files

• Use a torque- and speed-controlled electric
  motor, powering the hand-piece at 200 to 300 rpm.
• Be much gentler than with hand instruments.
  Always treat in a moist canal. Irrigate
  frequently!
• Slow down! Each instrument should do minimal
  shaping. Only two, three, or four passes may be
  required for the file to engage restrictive
  dentin and carve the shape to the proper depth.

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How to better use Large Taper Files

• Instruments break when flutes become loaded or
  when instruments are forced. Check the flutes
  frequently under magnification and clean them.
  Cyclic fatigue from overuse, or if the glide path
  is not well established, also leads to breakage.

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How to better use Large Taper Files

• Large Taper Files instruments are disposable
  and, like all endodontic files and reamers, are
  designed for single-patient use. Sometimes
  instruments are even changed within the same
  treatment (eg, in the case of a four-canal
  molar).
• Irrigate with 17 EDTA or a viscous chelator
  during the ProTaper shaping.

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How to disinfect, clean and sterilize files
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1. Manual Cleaning or assisted by an ultrasonic
device

• No visible impurities should be observed on the
  instruments.
• Discard any instruments with large obvious
  defects (broken, bent, and twisted).
• The disinfecting solution should be aldehyde
  free and without di- or triethanolamines as
  corrosion inhibitor.

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2. Rinsing

• Abundant rinsing (at least 1 min)
• Use quality water in accordance with local
  regulations.
• If a disinfecting solution contains a corrosion
  inhibitor, it is recommended to rinse the
  instruments just before the autoclaving.
• Dry on a single use non-weaved cloth, or with a
  drying machine or filtered compressed air.

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3. Packaging

• Place the devices in a kit, support or container
  to avoid any contact between instruments and pack
  the files in Sterilization pouches.
• Check the validity period of the pouch given by
  the manufacturer to determine the shelf life.
• Use packaging which are resistant up to a
  temperature of 141C (286F) and in accordance
  with EN ISO 11607.

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4. Sterilization

• Steam sterilization at 134 C / 273F during 18
  min.
• Use only autoclaves that are matching the
  requirements of EN 13060, EN 285.
• Use a validated sterilization procedure
  according ISO 17665
• Control the efficiency (packaging integrity, no
  humidity, color change of sterilization
  indicators).

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5. Storage

• Keep devices in sterilization packaging in a
• dry and clean environment
• Sterility cannot be guaranteed if packaging is
  open, damaged or wet.
• Check the packaging before using them (packaging
  integrity, no humidity and validity period).

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Thank you! To order email to icdr_at_hotmail.com or
call 94481 91202