Endo note 12   rotary technique
Upcoming SlideShare
Loading in...5

Endo note 12 rotary technique







Total Views
Views on SlideShare
Embed Views



0 Embeds 0

No embeds



Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
Post Comment
Edit your comment

Endo note 12   rotary technique Endo note 12 rotary technique Presentation Transcript

  • Non ISO File Technique8/24/2009 Endo12 1
  • Use stainless steel instruments - files files used manually files made by twisting wires of square, triangular or diamond cross section These have ISO taper8/24/2009 Endo12 2
  • ISO stands for International Standards Organization Taper is the amount by which the diameter of an instrument increases from tip to handle8/24/2009 Endo12 3
  • This is the taper set by the ISO It is set at 0.02 per mm This is commonly referred to as 02 taper8/24/2009 Endo12 4
  • 02 taper does not match the taper of root canals Root canals have tapers close to 04, 06 or even 088/24/2009 Endo12 5
  • By using a lot of instruments (files)in complex protocols e.g. Crown Down, Step Back Techniques8/24/2009 Endo12 6
  • A series of files used from coronal to apical sequentially with recapitulation8/24/2009 Endo12 7
  • S/S instruments have to be used in reciprocating action i.e. rotate clockwise, then anti-clockwise or in push - pull action If these are rotated continually in one direction, these fracture Not very flexible8/24/2009 Endo12 8
  • Push - pull action leads to ledge formation in root canals This action also pushes debris into the canal causing blockages8/24/2009 Endo12 9
  • By using these files manually in reciprocating action i.e. Balanced Force Technique But this is a very slow process8/24/2009 Endo12 10
  • By using Greater Taper GT files The Greater Tapers matchhRRoot Canal tapers tC needing fewer files By making them of Nickel Titanium instead of S / S so that these are flexible and can be rotated continually in one direction without risk of fracture Thus NiTi GT Rotary instruments were born8/24/2009 Endo12 11
  • Made of Nickel Titanium alloy NiTi wires cannot be twisted Therefore, made by machining - makes these files very expensive These have a Taper > ISO Taper Tapers of 04, 06, 08, 10 & even 12 These tapers are similar to taper of root canals8/24/2009 Endo12 12
  • 8/24/2009 Endo12 13
  • ISO Greater Taper 02 04 06 088/24/2009 Endo12 14
  • A ProFile Rotary File kit Note the large no. of files with different tapers and tip diameters8/24/2009 Endo12 15
  • A ProFile instrument Cross-section is similar to that of system GT with Triple U Endo12 shape8/24/2009 16
  • 06 taper 08 taper 10 taper8/24/2009 Endo12 17
  • Invented by Dr. Stephen Buchanan of USA in the 1980’s Has revolutionised Endodontic Practice Used in rotating action with special hand piece with a low speed, high torque motor Now several designs and brands available8/24/2009 Endo12 18
  • 8/24/2009 Endo12 19
  • NiTi exists in 2 forms with different properties Martensite Low temp form, low modulus, high strain Austenite High temp form, high modulus, low strain Shape memory NiTi exhibits super elasticity Under stress, martensite austenite8/24/2009 Endo12 20
  • Bends and returns to original shape Martensite Austenite Martensite Can negotiate curved root canals better8/24/2009 Endo12 21
  • A curved canal prepared with NiTi files8/24/2009 Endo12 22
  • System GT (Buchanan,Tulsa Dental) ProTaper (Dentsply) ProFile (Dentsply) RaCe (Schotlander) K3 (Sybron Kerr) Quantec FlexiMaster8/24/2009 Endo12 23
  • Note Triple Ucross-section ofthe rotary filecollect debrisFlat radial landskeep the filecentred on thenatural rootcanal whileenlarging it8/24/2009 Endo12 24
  • RaCe files have a triangular cross- section8/24/2009 Endo12 25
  • File tip is dome- shaped to prevent ledge formation & canallttransportation8/24/2009 Endo12 26
  • Progressively Tapered files Differing percentage of taper along the length of the file Makes the file even more flexible8/24/2009 Endo12 27
  • Note convex triangular cross- section8/24/2009 Endo12 28
  • Active cutting blades speed up cutting of root canal wall8/24/2009 Endo12 29
  • Blunt tip preventsledge formation &perforations8/24/2009 Endo12 30
  • Six files 3 Shapers SX S1 S2 3 Finishers F1 F2 F3 Finishing File F3 recognisable by Blue band on handle8/24/2009 Endo12 31
  • Same basic file shapes and tapers but designed to be used manually8/24/2009 Endo12 32
  • Unique handle allows ease of use8/24/2009 Endo12 33
  • Fewer files needed due to better taper Faster completion of canal preparation Flexible, enabling easy use in curved canals More predictable outcome8/24/2009 Endo12 34
  • Mandibular second molar with abrupt curvature of the distal canal. Note the apical control despite the conservative canal enlargement8/24/2009 Endo12 35
  • Before and after8/24/2009 Endo12 36
  • Before and after8/24/2009 Endo12 37