Cements Uses: Restorations Types: permanent, intermediate, temporary, buildups Luting agents Types: permanent, temporary Bases Types: sedative, insulating/protective Liners Root canal sealants

Cements Types: Zinc Phosphate (ZnPO4) Zinc Polycarboxylate Zinc oxide eugenol Glass ionomer Resin Compomers

Zinc Phosphate Powder: Zinc oxide Magnesium oxide Liquid: Brand name: Mizzy Flecks Uses: Permanent cementation Insulating base Temporary restoration on non-vital teeth Composition: Powder: Zinc oxide Magnesium oxide Liquid: Phosphoric acid in water

Zinc Phosphate Disadvantages: Advantages: It’s strong Poor thermal conductor Great insulator Prevents thermal shock to pulp Disadvantages: Highly acidic Must seal dentinal tubules on vital teeth prior to usage

Zinc Phosphate Mixing: Must be mixed on cool glass slab (higher temperature accelerates setting time) Powder is added in small increments Figure 8 spatulation helps to dissipate heat build up

Zinc Polycarboxylate/ Polyacrylate Brand name: Durelon Uses: Base Permanent cementation Orthodontic bands Temporary cementation (change proportioning)  Advantage: 1st adhesive material developed for use in dentistry. It bonds to tooth structure *(chelation) This adhesion results in very little leakage Chelation: a chemical reaction between two substances which bond together to form an adhesive bonds.

Zinc Polycarboxylate/ Polyacrylate Composition: Powder: Zinc oxide Stannic oxide Stannous fluoride Liquid: Polyacrylic acid water During mixing, the cement becomes highly acidic, however during the setting, the acid is neutralized. Liquid portion is very viscous Always hold the bottle perpendicular to the paper pad to ensure independent drops The liquid should not be dispensed until one is ready to mix, as water can evaporate, changing the reactivity and the cement properties. Cleanup spatula immediately because it bonds to stainless steel

Glass Ionomer Brand names: Ketac, GC, Fuji Uses: Liner Base Permanent Restoration Build-up material Luting Sealants

Glass Ionomer Advantages: Chemical adhesion to dentin and enamel Release fluoride over time, which inhibits recurrent decay, greater, amounts at the beginning and dissipates over time. Very versatile material Biologically kind to the tissue and pulp Capable of sealing dentin Good choice for Class V lesions for patients with a high caries risk Low solubility after the setting reaction is complete They bond to stainless steel and alloys for ceramometal crowns  

Glass Ionomer Disadvantages: High initial solubility in oral fluids Poor wear resistance in high stress areas

Glass Ionomer Supplied: Self-cured (chemical cured)(auto-cured) Light-cured Powder/ liquid Preproportioned capsules Reinforced with silver Reinforced with resin (Compomer)

Glass Ionomer Composition: Powder silicate glass containing calcium, aluminum and fluorine Liquid polyacrylic acid and copolymer in water, tartaric acid- regulates working and setting time Handling: Chemical cured materials must be handled properly: Powder/ liquid ratio is mixed to viscous state Placement and contouring must not be delayed or adhesion may be lost Initial setting is susceptible to dehydration, action must be taken to prevent this. Generally a sealant is placed over setting material to protect surface. Restorative material: Final polishing may need to be delayed 24 hours to allow the material to completely set.

Zinc Oxide Eugenol/ Non-Eugenol Brand names: IRM (Intermediate Restorative Material) Tempbond/ Tempbond NE Temrex Uses: Temporary luting Temporary filling/Intermediate restoration Sedative base/ palliative/obtundent  

Zinc Oxide Eugenol/ Non-eugenol Powder: majority zinc oxide rosin-an natural organic added to reinforce material and make it less brittle zinc acetate accelerates setting time Liquid: majority eugenol / caprylic acid Reinforced ZOE liquid- contain 65% orthoethoxybenzoic acid and 35 % eugenol (results in cement with increased strength Supplied: Powder/liquid Paste/paste (bulk or unidose) Preproportioned capsules Mixed: Glass or paper pad Amalgamator   Consistency: Luting: 1” off pad Base: putty rolled in a ball

Resin Cements Are basically fluid composites Composed of: Resin may be bis-GMA or urethane dimethacrylates Fillers- usually are barium glasses, some silica particles; fillers make up 30 or 60 % by weight of cement Uses: Luting brackets during orthodontic treatment (tx) Luting Maryland bridges Luting porcelain onlays, inlays and crowns Luting composite onlays, inlays and crowns Luting porcelain veneers Luting porcelain-metal crowns

Resin Cement Disadvantages: Supplied: Self cure Light cure Dual cure Material does not adhere to tooth surface therefore an etching and dentin adhesive procedure must be done Greater film thickness, care must be taken not to overload your crown Irritating to the pulp Excess cement must be removed immediately after cementation or it may damage the seal of cement when removed Supplied: Self cure Light cure Dual cure Advantages: Bonds to etched enamel and dentin Insoluble in oral fluids Tougher than most cements