Downloaded 72 times
Uploaded byVashi Narula
Obturation materials
1. Obturation is the process of filling and sealing the cleaned and shaped root canal using a root canal sealer and core material to eliminate pathways between the periodontium and root canal. 2. Ideal root canal filling materials are easily manipulated, seal completely and laterally, have adequate physical properties, set slowly with no shrinkage, are impervious to moisture, sterile or easily sterilized, radiopaque, and do not stain or encourage bacterial growth. 3. Common core filling materials include gutta-percha, Resilon, and mineral trioxide aggregate (MTA), while common sealers include zinc oxide-eugenol, calcium hydroxide, glass ionomer, and resin
More Related Content
Similar to Obturation materials
Obturation materials
- 1.
- 2. OBTURATION (American Associationof Endodontics) Obturation is the method used to fill and seal a cleaned and shaped root canal using a root canal sealer and a core filling material. It is done to eliminate all portals of entry between the periodontium and the root canal.
- 3. IDEAL REQUIREMENTS fora ROOT CANAL FILLING MATERIAL - GROSSMAN • Easily manipulated • Seal completely (laterally and apically) • Adequate physical properties Insertion Removal Set slowlyNo shrinkage Impervious to moisture
- 4. • Biological properties •Sterile or easily sterilized before insertion • Radiopaque Does not stain the tooth Biocompatible Discourage bacterial growth
- 5. WHEN TO OBTURATE? •Reasonably dry canal • No “weeping” of fluids • Blood or serous • Optimal shaping and cleaning--- Extra care to be taken with necrotic and infected pulp
- 6.
- 7.
- 8. SILVER CONES • Advantages ▫Stiff ▫ Easily inserted into fine, tortuous canal
- 9. • Disadvantages ▫ Corrosionwith saliva and periradicular fluids ▫ Toxic products- failure ▫ Stieglitz forceps needed to retrieve
- 10. GUTTA-PERCHA –BOWMAN, 1867 •COMPOSITION (FRIEDMAN) ▫ GUTTA-PERCHA 20% matrix ▫ ZINC OXIDE 66% filler ▫ HEAVY METAL SULPHATES 11% radiopacifier ▫ WAXES OR RESINS 3% plasticizer
- 11. Characteristics • Rigid naturallatex- Palaquium gutta • Trans isomer of polyisoprene ▫ α phase ▫ β phase heating shrinks 65° slow cooling β α solid mass melts β (tacky and flowable) α phase- thermoplasticized techniques β phase- lateral condensation
- 12. PROPERTIES • Easily sterilizedbefore insertion • No shrinkage after insertion • Does not encourage bacterial growth • Radiopaque, non staining, impervious to moisture • Removed easily, if required • Biocompatible
- 13. SIZES • Extra fine •Fine • Medium fine • Fine medium • Medium • Large • Extra large • Matches file size CONVENTIONAL STANDARDIZED
- 14. TAPER • ISO 2%-15-140 • 4-6% • Variable
- 15. RESILION • Polyurethane • Lateralcompaction, warm vertical compaction, thermoplasticized (150°C) • Adhesive properties
- 16. Composition • Polycaprolactone core •Difunctional methacrylate • Bioactive glass • Bismuth and barium salts • Pigments
- 17. MINERAL TRIOXIDE AGGREGATE •Indications –Bogen et al ▫ Combined with root resection ▫ Open apices ▫ Retreatment with MTA obturation ▫ Internal resorption ▫ Dens in dente • Limitations ▫ Difficult retreatment, curved canals ▫ Discolouration
- 18.
- 19. • Root canalsealers are used in conjunction with biologically acceptable semisolid or solid obturation materials to establish an adequate seal of the root canal system • CLASSIFICATION ▫ Zinc oxide eugenol based Grossman’s formula Roth’s 801 Tubliseal ▫ Calcium hydroxide based Sealapex Apexit ▫ Glass ionomer based ▫ Resin based AH plus AH26 Epiphany Diaket
- 20. Ideal Root CanalSealer -Grossman • Excellent seal • Adhesion, Cohesion • Radiopaque • Nonstaining • Dimentionally stable • Easily mixed and introduced in canals • Insoluble in tissue fluids • Discourages bacterial growth • Non irritating to periradicular tissues • Sufficient working time
- 21. ZINC OXIDE EUGENOLBASED • POWDER/BASE- zinc oxide • LIQUID/CATALYST- eugenol (Canada balsam may be added) • GROSSMAN’S CEMENT- ▫ POWDER Zinc oxide Staybelite resin Bismuth subcarbonate Barium sulfate Anhydrous sodium borate ▫ LIQUID Eugenol
- 22. ▫ Hardens in2 hours at 37degrees 100% relative humidity ▫ Set in root canal- 10-30mins ▫ 2-3 drops liquid+p0wder increments- smooth, creamy mix String out for an inch before breaking Cling to inverted spatula for 10-15 secs ▫ Spatulation- 1 min/drop • Canal should be dry • Master cone, lentulo spiral used for coating the canals • Lateral or rotary motion
- 23. CALCIUM HYDROXIDE BASED •Modification of ZoE based sealers ▫ Antimicrobial ▫ Osteogenic-Cementogenic properties • Sealapex ▫ Base- Zinc oxide Calcium hydroxide Butyl benzene Sulphonamide Zinc stearate ▫ Catalyst Resin Isobutyl salicylate Barium sulphate Titanium oxide Aerosol
- 24. GLASS IONOMER BASED •Dentin bonding ability • Difficult to remove during retreatment • Solvents are ineffective against them
- 25. RESIN BASED • AH26 ▫ Epoxy resin based ▫ Radiopaque (bismuth oxide) ▫ Strong adhesive properties ▫ Contracts slightly on hardening Releases formaldehyde
- 26. • AH plus •PASTE A ▫ Epoxy resin ▫ Calcium tungstate ▫ Zirconium oxide ▫ Silica ▫ Iron oxide PASTE B ▫ Adamantaneamine N ▫ Calcium tungstate ▫ Zirconium oxide ▫ Silica-silicone oil Does not release formaldehyde
- 27. Advantages • Good sealingability • Biocompatible • Moderate antimicrobial properties • Dentinal adhesion • Long working time • Ease of manipulation
- 28. REACTIONS TO OBTURATION MATERIALS •Irritable to periradicular tissue- reduce healing by 25% • Zinc oxide based sealers more irritating- eugenol • Epoxy resin sealers- most biocompatible Extrusion into the periradicular tissue should be avoided