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Dental luting cement

Dental luting cement. Bond Strength Strength Flow (viscosity) Wetting Film thickness (<25 microns ) Solubility Working,Setting time Esthetic. *Complication. Dental luting Cement. Zinc phosphate Polycarboxylate Glass ionomer RMGI cement Resin cement. Zinc phosphate.

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Dental luting cement

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  1. Dental luting cement • Bond Strength • Strength • Flow(viscosity) • Wetting • Film thickness(<25 microns) • Solubility • Working,Setting time • Esthetic *Complication www.rxdentistry.net

  2. Dental luting Cement • Zinc phosphate • Polycarboxylate • Glass ionomer • RMGI cement • Resin cement www.rxdentistry.net

  3. Zinc phosphate • Over 100 yrs of clinical experience • Routine application • Post-op sensitivities • Low hardness • High solubility • pH • No bond with tooth www.rxdentistry.net

  4. Polycarboxylate • Molecular bonding to tooth substance (2MPa) • Cost • Low F¯release • Low post-op sensitivities • Low hardness • solubility www.rxdentistry.net

  5. Glass ionomer • Molecular bonding to tooth substance • F¯release • Cost-Eff. • Minimal dimentional change • Occa. post-op sensitivities • Sensitive to water • Limited application (ceramics) (3-5MPa) (High caries risk) www.rxdentistry.net

  6. RMGI • Molecular bonding to tooth substance • F¯release • Low solubility • Fewer post-op sensitivities • Application ? (ceramics,composite) (>10MPa) www.rxdentistry.net

  7. Resin cement • High adhesive quality (18-20MPa) • ⇧ Retention • High hardness • Low solubility • All metal, ceramic,composite(indirect) • Occa. Post-op sensitivities www.rxdentistry.net

  8. Adhesive quality • Non-adhesive (zinc phosphate) • Micromechanical bonding (resin cement) • Molecular adhesion (polycarboxylate,GI,RMGI) www.rxdentistry.net

  9. Dental Cement • Zinc phosphate • Polycarboxylate • Glass ionomer • RMGI cement • Resin cement Conventional Adhesive www.rxdentistry.net

  10. Advantage conventional cement • Easy handling • Moisture tolerance • No pre-Tx steps • Routine for metal base www.rxdentistry.net

  11. Advantage resin cement • Excellent mechanical properties • High bond strength with pre-Tx step • High aesthetics/translucency • Suitable for Ceramic, Porcelain, Composite,Metal www.rxdentistry.net

  12. Resin cement • Matrix • Primer • Filler • Coupling agent www.rxdentistry.net

  13. Resin cement • Matrix - Dimethacrylate • Primer- Dicrylate • Filler - Quartz, silica • Coupling agent- Silane dimethacrylate www.rxdentistry.net

  14. Resin cement • Total etch Rely X ARC,Variolink II ,Calibra ,C&B • Self-etch Panavia F • Self-AdhesiveRely X Unicem www.rxdentistry.net

  15. Adhesion • Dentin/enamel (micromachanical bond) • Porcelain (hydrofluoric acid,Ammoniumfluoride acid)+ silane • Metal (sandblasting)(metal bonding adhesive) • Fiber post www.rxdentistry.net

  16. Adhesion • Dentin/enamel (micromachanical bond) • Porcelain (hydrofluoric acid,Ammoniumfluoride acid)+ silane • Metal (sandblasting)(metal bonding adhesive) • Fiber post www.rxdentistry.net

  17. Adhesion • Dentin/enamel (micromachanical bond) • Porcelain (hydrofluoric acid,Ammoniumfluoride acid)+ silane • Metal (sandblasting)(metal bonding adhesive) • Fiber post www.rxdentistry.net

  18. Adhesion • Dentin/enamel (micromachanical bond) • Porcelain (hydrofluoric acid,Ammoniumfluoride acid)+ silane • Metal (sandblasting)(metal bonding adhesive) • Fiber post www.rxdentistry.net

  19. no local peak forces, no root fracture root fracture! Why are fiber post? • Clinical success rate: Less root fracture than with metal posts:Dentine-like flexural strenght avoids the “wedge” effect of stiff and hard metal posts. fiber post metal • Esthetics: the new post is translucent and does not shine through ceramic or composite restorations • 3. Easy and conservative removal with drills if endodontic re-treatment is required www.rxdentistry.net further advantages: no corrosion, easy cutting of over-length, light-translucent...

  20. Resin cement • Bond strength > Zinc phosphate 10 times • ↑ Retention • Reinforced ceramic - base Crown • Adhesive system (micromachanical bond-tooth) (chemical bond-porcelain,metal) • Low solubility • ↓ leakage www.rxdentistry.net

  21. Pre-treatment procedure www.rxdentistry.net

  22. Pre-treatment procedure www.rxdentistry.net

  23. Pre-treatment procedure www.rxdentistry.net

  24. Polymerization • Light-cured/Dual cure (2 vials - Base,Catalyst) • Self cure/auto cure • Dual cure www.rxdentistry.net

  25. Adhesion • Dentin/enamel (micromachanical bond) • Porcelain (hydrofluoric acid,Ammoniumfluoride acid)+ silane • Metal (sandblasting)(metal bonding adhesive) • Fiber post Adhesive cement bonding to tooth ,alloy structure www.rxdentistry.net

  26. Clinical Tips • Anesthetic • Isolate (pack cord) • Light cure 2-3 sec • Include 3-5 shades,silane • Remove solvent-can inhibit setting of resin cement • Excess bonding –poor fit,low strength • Temp NE www.rxdentistry.net

  27. Shade • Opaque –veneer + Tetracycline • Clear (translucent) • Vita shade www.rxdentistry.net

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