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Gic presentation

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Glass inomer

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Gic presentation

  1. 1. GLASS IONOMER CEMENT Dr.Shahbaz Ahmed BDS, MSc (UK), FCPS (Pak) Assistant Professor Department of Operative Dentistry DIKIOHS
  2. 2. Historical Evolution
  3. 3. Universal CEMENTS GI COMPOSITE HYDROGEL Hydrophobic POLYMER RM-GI  GI and  VLC Hydrophilic monomer and polymer CEMENTS MM-GI  GI and  Metallic fillers  Cermet fillers CORES COMPOMER  VLC Composite and  F source FILLING MATERIALS RR-GI  GI and  Resin-Fillers A.R.T. and TEMPORARIES GIOMER  VLC Composite and  Pre-reacted GIC powder FILLING MATERIALS CEMENTS FILLING MATERIALS
  4. 4. Classification on the Basis of Applications  Type I - For luting cements  Type II - For Restorations  Type III - Liners and bases  Type IV - Fissure sealants  Type V - Orthodontic Cements  Type VI - Core build up  Type IX – For A.R.T
  5. 5. Composition
  6. 6. SETTING REACTION
  7. 7. FLUORO-ALUMINO-SILICATE PARTICLE CEMENT MATRIX F-1, Ca+2, Al+3, Si+4 Initial dissolution for starting reaction rapid early F release from matrix Slow long term F release by diffusion from particle FLUORIDE RELEASE Fluoride comes from matrix and particles at different rates.
  8. 8. EFFECTIVE LEVELS 20 10 15 5 14 21 2870 TIME (Days) FLUORIDERELEASE(ppm) Fluoride Toothpaste, Topical Fluoride, Fluoride Mouthrinse PARTICLES MATRIX
  9. 9. MANIPULATION OF GLASS IONOMER CEMENT
  10. 10. Properties
  11. 11. Setting Time
  12. 12.  Mixing Time: 30 seconds  Working Time: 2 minutes  Setting Time: 5 minutes  Total Time: 5-6 minutes at 23 C
  13. 13. Esthetics
  14. 14. Water Sensitivity, Solubility and Disintegration
  15. 15. Margin Adaptation and Leakage
  16. 16. Physical Strengths
  17. 17. Biocompatibility Anticariogenic Affect by way of Fluoride Release
  18. 18. Finishing
  19. 19. Advantages  Inherent adhesion to tooth structure  High retention rate  Little shrinkage and good marginal seal  Fluoride release and hence caries inhibition  Biocompatible  Minimal cavity preparation required hence easy to use on children in and suitable for use even in absence of skilled dental manpower and facilities (such as in ART)
  20. 20. Disadvantages  Brittle  Soluble  Abrasive  Water sensitive  Some products release less fluoride then conventional GIC  Not Radiopaque (only true for conventional GIC lacking Lanthanum, Strontium, Barium or Zinc Oxide additives)  Slow setting and hence harder to use  Less aesthetic then composite
  21. 21. Applications / Uses
  22. 22. As Luting Agents
  23. 23. As Orthodontic Brackets Adhesives
  24. 24. As Pit and Fissure Sealants
  25. 25. As Liners and Bases
  26. 26. For Core Build Up
  27. 27. For Intermediate / Temporary Restoration
  28. 28. Restorations  Tunnel Restoration  Root caries  Cervical / Class V restorations *  Single-surface fillings in areas not involved in occlusion/ Non-stress bearing areas
  29. 29. Sandwich technique
  30. 30. ‘Closed Sandwich’ ‘Open Sandwich’
  31. 31. Co-cured Technique
  32. 32. Co-cured Technique - G. Knight  Resin-modified GIC placed first as a thin liner beneath composite resin, then cured together.  Reduces polymerization stress from composite, reduced micro leakage  Adhesion is provided by micromechanical (resin) and by chemical (GIC ion-exchange) methods
  33. 33. Retrograde / Apical Filling (Geristore)
  34. 34. Fuji IX Developed as temporary restorations for 3rd world countries. First tested in African countries. Now used widely in Asian countries. Current technique = P/L or precapsulated mixture. Original technique = scoop, finger mix, finger insertion. A.R.T. RESTORATIONS ART = Atraumatic Restorative Technique Atraumatic Restorative Treatment (ART) = prevention and treatment of dental carie sbased on excavating and removing caries using hand instruments only and restoring glass ionomer.
  35. 35. As Restorations for Deciduous Teeth

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