Dental Cement
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Dental Cement

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Dental Cement Dental Cement Presentation Transcript

  • Dental luting cement
    • Bond Strength
    • Strength
    • Flow (viscosity)
    • Wetting
    • Film thickness (<25 microns )
    • Solubility
    • Working,Setting time
    • Esthetic
    *Complication dr shabeel pn
  • Dental luting Cement
    • Zinc phosphate
    • Polycarboxylate
    • Glass ionomer
    • RMGI cement
    • Resin cement
  • Zinc phosphate
    • Over 100 yrs of clinical experience
    • Routine application
    • Post-op sensitivities
    • Low hardness
    • High solubility
    • pH
    • No bond with tooth
  • Polycarboxylate
    • Molecular bonding to tooth substance (2MPa)
    • Cost
    • Low F ¯ release
    • Low post-op sensitivities
    • Low hardness
    • solubility
  • Glass ionomer
    • Molecular bonding to tooth substance
    • F ¯ release
    • Cost-Eff.
    • Minimal dimentional change
    • Occa. post-op sensitivities
    • Sensitive to water
    • Limited application (ceramics)
    (High caries risk) (3-5MPa)
  • RMGI
    • Molecular bonding to tooth substance
    • F ¯ release
    • Low solubility
    • Fewer post-op sensitivities
    • Application ? (ceramics,composite)
    (>10MPa)
  • Resin cement
    • High adhesive quality (18-20MPa)
    • ⇧ Retention
    • High hardness
    • Low solubility
    • All metal, ceramic,composite (indirect)
    • Occa. Post-op sensitivities
  • Adhesive quality
    • Non-adhesive (zinc phosphate)
    • Micromechanical bonding (resin cement)
    • Molecular adhesion (polycarboxylate,GI,RMGI)
  • Dental Cement
    • Zinc phosphate
    • Polycarboxylate
    • Glass ionomer
    • RMGI cement
    • Resin cement
    Conventional Adhesive
  • Advantage conventional cement
    • Easy handling
    • Moisture tolerance
    • No pre-Tx steps
    • Routine for metal base
  • Advantage resin cement
    • Excellent mechanical properties
    • High bond strength with pre-Tx step
    • High aesthetics/translucency
    • Suitable for Ceramic, Porcelain, Composite,Metal
  • Resin cement
    • Matrix
    • Primer
    • Filler
    • Coupling agent
  • Resin cement
    • Matrix - Dimethacrylate
    • Primer- Dicrylate
    • Filler - Quartz, silica
    • Coupling agent- Silane dimethacrylate
    • Total etch Rely X ARC , Variolink II ,Calibra ,C&B
    • Self-etch Panavia F
    • Self-Adhesive Rely X Unicem
    Resin cement
  • Adhesion
    • Dentin/enamel (micromachanical bond)
    • Porcelain (hydrofluoric acid,Ammoniumfluoride acid)+ silane
    • Metal (sandblasting)(metal bonding adhesive)
    • Fiber post
  • Adhesion
    • Dentin/enamel (micromachanical bond)
    • Porcelain (hydrofluoric acid,Ammoniumfluoride acid)+ silane
    • Metal (sandblasting)(metal bonding adhesive)
    • Fiber post
  • Adhesion
    • Dentin/enamel (micromachanical bond)
    • Porcelain (hydrofluoric acid,Ammoniumfluoride acid)+ silane
    • Metal (sandblasting)(metal bonding adhesive)
    • Fiber post
  • Adhesion
    • Dentin/enamel (micromachanical bond)
    • Porcelain (hydrofluoric acid,Ammoniumfluoride acid)+ silane
    • Metal (sandblasting)(metal bonding adhesive)
    • Fiber post
  • 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.
    metal fiber post
    • 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
    further advantages : no corrosion, easy cutting of over-length, light-translucent... root fracture! no local peak forces, no root fracture
  • 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
  • Pre-treatment procedure
  • Pre-treatment procedure
  • Pre-treatment procedure
  • Polymerization
    • Light-cured/Dual cure (2 vials - Base,Catalyst)
    • Self cure/auto cure
    • Dual cure
  • 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
    • 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
    Clinical Tips
  • Shade
    • Opaque – veneer + Tetracycline
    • Clear (translucent)
    • Vita shade