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Basic endodontics instruments its use in cleaning and shapeing

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endodontics instrument

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Basic endodontics instruments its use in cleaning and shapeing

  1. 1. Presented by : 1. Sarah salah khalil 2. Ramajmohamedelfeki 3. Rana mohieldeinmotawe' 4. zahraa Abd_Allah Ali 5. sara mosaad Mahmoud 6. salma hatemmohammed 7. samar Samir eissa
  2. 2. Access cavity Cleaning and shaping Obturation
  3. 3.  The root canal system must be :  Cleaning of its organic remnants.  Shaping to receive a three dimensional filling of root canal space.
  4. 4. The canal is  Cleansed primarily by irrigation  Shaped primarily by instrumentation
  5. 5.  Create a continuous taper with the narrowest part apically and the widest part coronal.  By instruments.
  6. 6.  According to material of construction  According to power source  According to method of manufacturing  ISO classification
  7. 7. Carbon steel Stainless steel Ni-Ti Diamond Advantage •Hardness than St-St •Corrosion resistance •Shape memory •Super elastic •Corrosion resistance Disadvantage •Corrosion •Can’t resterilized •Brittle •Prone to fracture •Stiff in nature •Permanent distortion •Less cutting efficiency •No sign of fatigue before fracture Example Barbed broach H-file , K-file, reamer Ni-Ti hand file ,profile, protaper Sonic & ultrasonic
  8. 8.  HAND Driven :  Engine Driven :rotary & vibratory  Counter clock wise twisting  Machine grinding
  9. 9.  GROUP I- Hand use only , files  GROUP II- low speed instrument latch type drill , Gates-Glidden  GROUP III- Engine driven latch type same as group I
  10. 10. 1. Standardization of length of cutting blade :  The length of cutting blade =  The full length of instrument (L) =
  11. 11. 2. Standardization of Diameter : Diameter at D16 is Uniformly greater Than D0 = D0D16
  12. 12. 3. Standardization of numbering system:  The number indicates the diameter at the tip in hundredth of mm  File size #15, D0 =15/100 =0.15mm
  13. 13. 4. Standardization of taper :  Taper : the amount the file diameter increases each mm along its cutting blade.  Taper = Diameter/Length =0.32/16=0.02mm diameter /mm length  D12 =0.15+(.02*12)=0.39mm
  14. 14. 5. Standardization of tip angle:  the tip angle 75+/- 15
  15. 15. 6. Standardization of color coding Color Size Tip (mm)at D0 at D16 Pink Grey Purple 06 08 10 0.06 0.08 0.10 0.38 0.40 0.42 White Yellow Red Blue Green Black 15 20 25 30 35 40 0.15 0.20 0,25 0.30 0.35 0.40 0.47 0.52 0.57 0.62 0.67 0.72 White Yellow Red Blue Green Black 45 50 55 60 70 80 0.45 0.50 0.55 0.60 0.70 0.80 0,77 0.82 0.87 0,92 1.02 1,12 White Yellow Red Blue Green Black 90 100 110 120 130 140 0.90 1.00 1.10 1.20 1,30 1.40 1.22 1.32 1.42 1.52 1.62 1,72 #6-#10 =.02mm #10-#60=.05mm #60-#140=.1mm
  16. 16. A. Basic instrument :  Broach and rasps (rat –tail file / R-file)  Reamer  Files B. Hybrid instrument
  17. 17.  Expiration pulp tissue.  Remove cotton or point paper lodge in canal. Broach Rasps Barb are fine and longer Barb are blunt and shorter
  18. 18.  Method of fabrication : counter clock wise twisting  Material of manufacture : stainless steel  Cross-section :  Motions : Ream (insertion , full turn and withdraw)  Uses preparation round canal
  19. 19.  Method of fabrication : counter clock wise twisting  Material of manufacture : stainless steel  Cross-section :  Motions : 1. Ream (insertion , full turn and withdraw) 2. Filing (push and pull 3. Quarter turn and pull
  20. 20.  Method of fabrication : machine grinding  Material of manufacture : stainless steel  Cross-section : coma shape  Motions : 1. Filing (push and pull
  21. 21. I. Modification in instrument design: 1. Modification in the cross-section. 2. Modification in depth and angle of cutting blade. 3. Modification in taper. 4. Modification in tip design. 5. Modification in length of the cutting blade. II. Modification in material of manufacturing. III.Modification in method of manufacturing. IV.Modification in numbering system
  22. 22.  1. Modification in the cross-section. K-file modification Flex-0-file & Flex –R-file Flexibility and cutting Efficiency. Apply light force K-flex-file Flexibility and cutting Efficiency Debris removal
  23. 23. H-file modification Unifile & S-file Heli-file
  24. 24.  2.Modification in taper. • All Ni-Ti has taper greater than ISO taper (0.02) range from (0.04 to 0.12). • To increase coronal flaring. • ProTaper.  3.Modification in tip design.  Non-cutting tip ,less transportation
  25. 25.  5. Modification in length of the cutting blade  Reduction cutting blade from 16mm to 2.5-4mm.  Canal master  It has U-shaped design, which keeps the instrument centralized within the canal and reduce tendency of the instrument to screw-in.  A noncutting smooth shaft.  A noncutting pilot tip, that allows the instrument remains within the lumen of the canal, thus avoid transportation.
  26. 26.  Nickel-titanium  2-3 times flexible than stainless steel instruments  super elasticity  k-file modifications: Ultra file  H-file modification : Hyflex
  27. 27.  K-file modifications :  Machine grinded 1- flex-o-file and flex-R-file 2-Ni-Ti fffiles  H-file modifications : Safety headstrom file
  28. 28.  The D0 diameter progressively increased by  0.02 mm for ISO sizes 6-10.  0.05 mm for sizes 10-60.  0.10 mm for sizes 60-140.  This means that, the D0 diameter not has a constant percentage change from one instrument size to another.  To reduce the large percentage change between the smaller- sized files:  Golden Mediums (12-37)  #10 =0.1mm #12=0.12mm #15=0.15mm  The ProFile Series 29  These instruments are based on a constant percentage change 29.17% at D0
  29. 29.  Gates-Glidden drills  They have long thin shaft with a flame-shaped cutting head (one spiral).  They are side cutting instruments with safety tips.  They are available in 6 sizes from .1-6 (# 50-150). Number of rings on the shank identifies the specific drill size.  They are made of either St St or Ni-Ti (Flexogates).  They are designed to break high on the shaft if excessive resistances encountered, allows the clinician to remove the fragment easily.  Uses: 1. Preenlarging the coronal. 2/3.of the root canal; 2. Opening of the canal orifice. 3. Removal of Gutta-percha.
  30. 30. •They have long thin shaft with a flame- shaped cutting head (two spiral). •They are side cutting instruments with safety tips. •They are available in 6 sizes from .1-6 (# 70-170). Number of rings on the shank identifies the specific drill size.
  31. 31.  NaOCl  EDTA and CITRIC ACID (CA)  CHLORHEXIDINE DIGLUCONATE (CHX)  MTAD (Mixture of Tetracycline isomer, Acid, and Detergent)
  32. 32.  Manual : 1) Syringe irrigation with needles/ cannulas (end/side vent) 2) Brushes  MACHINE ASSISTED 1) Rotary brushes 2) Continuous irrigation during rotary instrumentatin (Quantec-E) 3) Sonic 4) Ultrasonic 5) Pressure alternating devices :  EndoVac  Rinse Endo 6) Recent advance system  Lasers  Light activated disinfection (LAD)  Electrochemically activated water (ECA)  Oxidative potential water (OPW)
  33. 33. I. Syringe irrigation with needles/ cannula:  Different sizes (1-20 ml)  Modifications of tip of the needles A. Bivelled B. Monoject C. Safe ended  Modifications of needles A) Bending the tip B) Flexiglide needle  Advantages A) 27-31 gauge recommended B) Should not bind in the canal C) Easily controlled  Disadvantages A) Not enough flushing action B) Deliver solution only 1 mm deeper than the tip of the needle

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