Obturation Of Root Canal Question And Answers

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Obturation Of Root Canal Important Notes

  • Techniques of heat compaction of gutta percha
    • Vertical compaction
    • Injectable gutta percha
    • Thermo-mechanical compaction
    • Core carrier technique
  • Composition of gurra percha cones

Endodontics Obturation Of Root Canal Composition of gutta percha cones

  • Ideal requirements of filling material
    • Easy to introduce and easy to remove
    • Seal canal laterally as well as apically
    • Impervious to moisture
    • Should not shrink after insertion
    • Should be bactericidal
    • Should not stain the tooth
    • Should not irritate periapex
    • Should be sterile

Obturation Of Root Canal Long Essays

Question 1. Describe briefly different obturation techniques? Add a note on materials used for obturation.
Answer.

Obturation Methods:

Use of cold guttapercha:

  • Lateral compaction

Use of chemically softened guttapercha:

  • Chloroform
  • Halothone
  • Eucalyptol

Use of heat softened guttapercha:

  • Vertical compaction
  • System B
  • Sectional compaction
  • Thermoplasticized
  • Solid core
  • Mcspadden

Obturation Of Root Canal Lateral Compaction:

Endodontics Obturation Of Root Canal Lateral Compaction

Endodontics Obturation Of Root Canal Tugback with master gutta-percha cone

Read And Learn More: Endodontics Question and Answers

Endodontics Obturation Of Root Canal Compaction of guttapercha using spreader

Endodontics Obturation Of Root Canal Cut the protruding gutta percha points

Endodontics Obturation Of Root Canal Use of more accesory cones to complete obturation of the canal

Obturation Of Root Canal Advantages:

  • Reduces over filling

Obturation Of Root Canal Disadvantages:

  • Do not produce homogenous mass
  • May not fill canal irregularities

Obturation Of Root Canal Obturating Materials:

  • Plastics – GP, resilon
  • Solid/metal core – Silver points, gold
  • Cements and pastes – Hydron, MTA, Calcium phosphate

Obturation Of Root Canal Properties:

  • Easily introduced
  • Seal canal
  • Stable
  • Baceriostatic
  • Non-staining
  • Radiopaque
  • Non-irritating
  • Sterile
  • Easily removed
  • Imprevious to moisture

Question 2. What are the various obturation techniques? Write in detail about thermoplasticized technique.
Answer.

Obturating Methods:

Obturating Methods Use of cold guttapercha:

  • Lateral compaction

Obturating Methods Use of chemically softened guttapercha:

  • Chloroform
  • Halothone
  • Eucalyptol

Obturating Methods Use of heat softened guttapercha:

  • Vertical compaction
  • System B
  • Sectional compaction
  • Thermoplasticized
  • Solid core
  • Mcspadden

Thermoplasticized Gutta Percha Technique

Thermoplasticized Gutta Percha Principle:

  • It comprises a pressure apparatus consisting of an insulated electrically heated syringe barrel and a seledction of needles ranging from 18-25 gauge size
  • The plunger is designed to prevent backward flow of the gutta percha

Thermoplasticized Gutta Percha Technique:

  • Canal preparation
  • Drying of canal
  • Sealer is coated on the canal walls
  • Gutta percha is electrically heated in a handheld gun that contains a chamber surrounded by a heating element
  • Selected needle is positioned at 3-5mm short of the working lenght
  • Gutta percha is gradually injected by sqeezing the trigger of the gun and the needle is gradually withdrawn as the canal gets filled apically
  • Gutta percha is then compacted using pluggers of appropriate size
  • Similarly the rest of the canal is filled

Question 3. Root canal sealers.
Answer.

Root canal sealers

  • Root canal sealers are necessary to fill irregularities and minor discrepancies between the canal walls and filling

Root canal sealers Requirements:

  • Should be tacky
  • Should create hermetic seal
  • Should be radiopaque
  • Should be miscible
  • Should be bacteriostatic
  • Should set slowly
  • should insoluble in oral fluids
  • Should not shrink
  • Should not stain

Root canal sealers Functions:

  • Antimicrobial agent
  • Lubricant
  • Binding agent
  • Fills the space between material and canal walls
  • As obturationg material
  • Give radiopacity

Root canal sealers Classification:

Eugenol:

  • Eugenol Silver Containing:
    • Kerr sealer
      • Powder
        • Zinc oxide
        • Silver
        • Thymol iodide
      • Liquid
        • Oil of cloves
        • Canada balsam
  • Eugenol Silver Free:
    • Grossman’s sealer
    • It consists of
      • Powder
        • Zinc oxide
        • Staybellite resin
        • Bismuth subcarbonate
        • Barium sulphate
        • Sodium borate
      • Liquid
        • Eugenol

Eugenol  Medicated:

  • Iodoform

Eugenol Non-Eugenol:

  • Hydron
  • Glass ionomer
  • Diaklet
    • It is chemically polyketone
    • It consists of
      • Powder
        • Zinc oxide
        • Bismuth phosphate
      • Liquid
        • Polyvinyl resin

Eugenol Advantages:

  • Good adhesion to tooth
  • Rapid set
  • High tensile strength

Eugenol Disadvantages:

  • Tacky in texture
  • Difficult to manipulate

Obturation Of Root Canal Short Essays

Question 1. Ideal requirements of root canal sealers. Add a note on AH26.
Answer.

Root Canal Sealers Requirements:

  • Should be tacky
  • Should create hermetic seal
  • Should be radiopaque
  • Should be miscible
  • Should be bacteriostatic
  • Should set slowly
  • Should be insoluble in oral fluids
  • Should not shrink
  • Should not stain

AH26:

  • This is an epoxy resin containing sealer
  • It is adhesive, well tolerated by tissues and provides good seal

AH26 Disadvantages:

  • Staining of tooth structure as it contains silver
  • It is insoluble in solvents

AH26 Plus:

  • This eliminates all the disadvantages associated with AH26

Question 2. Obturating materials.
Answer.

Obturating materials Materials:

  • Plastics – GP, resilon
  • Solid/metal core – Silver points, gold
  • Cements and pastes – Hydron, MTA, Calcium phosphate

Obturating materials Properties:

  • Easily introduced
  • Seal canal
  • Stable
  • Baceriostatic
  • Non-staining
  • Radiopaque
  • Non-irritating
  • Sterile
  • Easy removed
  • Imprevious to moisture

Question 3. Gutta Percha.
Answer.

Gutta Percha

Endodontic filling material

Gutta Percha Forms:

  • Alpha
  • Beta
  • Amorphous

Gutta Percha Available Forms:

  • GP points
  • Auxillary points
  • Greater taper
  • Syringe
  • Medicated

Gutta Percha Advantages:

  • Compactibility
  • Inertness
  • Dimensional stable
  • Tissue tolerance
  • Radiopacity
  • Plasticity
  • Dissolve in some solvents

Gutta Percha Disadvantages:

  • Lack of rigidity
  • Lack of adhesiveness
  • Easily displaced

Question 4. Grossman’s Sealer.
Answer.

Grossman’s Sealer Composition:

Grossman’s Sealer Powder:

  • Zinc oxide
  • Staybelite resin
  • Barium sulfate
  • Bismuth subcarbonate
  • Sodium borate

Grossman’s Sealer Liquid:

  • Eugenol

Grossman’s Sealer Properties:

  • Plasticity
  • Slow setting time
  • Good sealing

Grossman’s Sealer Disadvantage:

  • Require vigorous mixing
  • Setting time – 2 hours at 37°C

Grossman’s Sealer Influenced By:

  • Quality of ZnO and pH
  • Mixing
  • Humidity
  • Temperature and dryness of slab and spatula

Obturation Of Root Canal Short Questions And Answers

Question 1. Composition of Grossman’s sealer.
Answer.

Grossman’s sealer Powder:

  • Zinc oxide
  • Staybelite resin
  • Barium sulfate
  • Bismuth subcarbonate
  • Sodium borate

Grossman’s sealer Liquid:

  • Eugenol

Question 2. Diaket
Answer.

Diaket

  • By Schmidt in 1951

Diaket Composition:

Diaket Powder:

  • Zinc Oxide
  • Bismuth phosphate

Diaket Liquid:

  • 2,2 dihydroxy – 5,5 dichlorodiphenyl methane
  • Triethanolamine
  • B-diketone
  • Caproci acid
  • Copolymers

Diaket Advantages:

  • Good adhesion
  • Fast setting
  • Stable
  • Superior tensile

Diaket Disadvantages:

  • Toxic
  • Tacky
  • Setting is effected by phenol

Question 3. Mcspadden compaction.
Answer.

Mcspadden compaction Technique:

Endodontics Obturation Of Root Canal Mcspadden compaction Technique

McSpadden compaction Advantages:

  • Less time
  • Easy to insert
  • 3D obturation

McSpadden compaction Disadvantages:

  • Unable in narrow and curved canals
  • Frequent breakage
  • Overfilling
  • Shrinkage of guttapercha

 

Endodontics Obturation Of Root Canal Thermo-mechanical compaction of gutta percha

Question 4. AH Sealer
Answer.

AH26:

  • This is an epoxy resin containing sealer
  • It is adhesive, well tolerated by tissues, and provides a good seal

AH26 Disadvantages:

  • Staining of tooth structure as it contains silver
  • It is insoluble in solvents

AH26 Plus:

  • This eliminates all the disadvantages associated with AH26

Obturation Of Root Canal Viva Voce

  • Gutta-percha cones may be kept sterile in screw-crapped vials containing alcohol.
  • Lateral compaction is easy and quick to perform.
  • Tug back refers to the apical seal fit of the master cone.
  • Inadequate obturation is the most common cause of RCT failure.
  • Silver cones are contraindicated in filling a root canal if the tooth is to be restored with a post and care.
  • Ideally, the length of the post and core should be 2/3rd of the root canal.
  • Injectable gutta-percha is especially useful while managing canal irregularities.
  • Thermafill contains a center carrier which is grooved along 600 of their circumference. and has a coating of gutta-percha.
  • The silver cone is stiffer than gutta-percha.
  • Endorez is a visible light-curable urethane dimethacrylate resin-based sealer.

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