DENTAL CEMENTS 1 Flashcards
What cements are used to bond preformed
restorations and orthodontic attachments
Luting agents
What are used to protect the pulp and foundations for restorations?
Cavity liners and bases
Water based cements include…
- Glass Ionomers
- Hybrid Ionomers
- Zinc Polycarboxylate
- Zinc Phosphate
Oil based cements include…
- Zinc Oxide-Eugenol
- Non-eugenol Zinc Oxide
- Calcium Hydroxide (Self-cured)
Resin based cements include…
- Composite and Adhesive Resin
- Compomer
- Calcium Hydroxide (Light-cured)
Temporary or provisional cements include…
Zinc oxide*** with and without eugenol.
Temporary cement that we use is…
Temp Bond NE
Glass Ionomer Indications
1) Class V restorations
2) Retention of alloy restorations
3) Retention of orthodontic bands
4) High-strength bases
5) Provisional restorations
Glass Ionomer Composition
■ Powder: - Finely ground aluminosilicate glass ■ Liquid: - Polycarboxylate copolymer - Water
Glass Ionomer Cement Film thickness is between
22 to 24 micrometers
What is GC Fuji Lining LC At ASDOH is used for…
■ Light-cured GI that is used as a liner/base under both
direct and indirect restorations
■ It has a high-compressive strength, minimal
polymerization shrinkage and extremely low solubility.
■ Low post sensitivity and long term fluoride release
What is Fuji II LC At ASDOH
■ Light-cured GI that is used as a liner/base under both
direct and indirect restorations
■ It has a good flexural strength and bond strength to
teeth even in presence of saliva, excellent esthetics
■ Indicated for Class V, cervical erosions/abfractions
What is Fuji IX GP At ASDOH?
■ Used as core build up, final restoration class I - V (non-stress areas) and long-term temporary restoration
■ Chemically bonds to tooth structure, tooth-like
coefficient of thermal expansion
■ Releases significant levels of rechargeable fluoride
Hybrid Ionomer
Indications
1) Class V restorations
2) Retention of alloy, zirconia and
alumina core restorations
3) Retention of orthodontic bands
4) High-strength bases
Hybrid Ionomer Composition
■ Powder: - Radiopaque fluoroaluminosilicate glass - Microencapsulated catalyst system ■ Liquid: - Polycarboxylic and tartaric acid - Pendant methacrylate groups - 2-hydroxyethylmethacrylate (HEMA)
What is Hybrid Ionomer
■ Hybrid ionomer, resin-reinforce glass
ionomer
■ Introduce en 1990s
☺ Less susceptible to early moisture
exposure
☹ Should be avoided with all-ceramic restorations, except zirconia and alumina cores (associated with fracture)
☹ Expensive
What is GC FujiCEM 2, GC used for At ASDOH
■ 12 Microns
■ For all types of metal, resin, alumina and zirconia based inlays, onlays, crowns, FPDs, and endodontic post restorations
■ Light yellow shade
■ No post-op sensitivity
Zinc Polycarboxylate Indications
1) Retention of alloy restorations
2) Retention of orthodontic bands
3) High-strength bases Less irritating to the pulp
Zinc Polycarboxylate Composition
■ Powder: -Zinc oxide ■ Liquid: - Polyacrylic acid - Water
Zinc Polycarboxylate Film thickness
Film thickness is between 25 to 48 microns
Zinc Phosphate Indications
1) Retention of alloy restorations
2) Retention of orthodontic bands
3) High-strength bases
4) Provisional restorations
Zinc Phosphate Composition
■ Powder:
- Zinc oxide
- Magnesium oxide
- Pigments
■ Liquid:
- Phosphoric acid
- Water (Al-Zn ions)
One bad thing about Zinc Phosphate Cement
☹ High acidity
Zinc Oxide-Eugenol Indications
1) Low and high-strength bases
2) Provisional restorations
3) Temporary and permanent retention of restorations
Zinc Oxide-Eugenol Composition
■ Powder: - Zinc Oxide (69%) - Rosin (29%) - Zinc acetate ■ Liquid: - Eugenol
Non-Eugenol Zinc Oxide Indications
1) Temporary retention of restorations
2) Root canal sealers
3) Gingival tissue packs
4) Surgical dressings
Pro’s and Cons of Zinc Oxide with EBA
■ 2-ethoxybenzoic acid (EBA), replace the
portion of eugenol
☺ Improves compressive strength.
☺ Good biocompatibility and pulp
protection
☹ Short working time
☹ Excess of material is difficult to remove
Calcium Hydroxide Indications
1) Low-strength base
2) Temporary retention of restorations
3) Used for direct and indirect pulp
capping
4) Protective barrier beneath composite
restorations
Calcium Hydroxide Pro’s and Cons
☹ Low mechanical properties
☺ Stronger than zinc oxide-eugenol
☺ Low thermal conductivity
☺ Stimulate the formation of reparative dentin
Composite and Adhesive Resins Indications
1) Bonded conventional crown and bridge
2) Bonded ceramic and composite veneers,
inlays and onlays
3) Bonded post and cores
4) Bonded Maryland bridges
5) Retention of provisional restorations
6) Retention of orthodontic brackets
7) High-strength bases
Composites and Adhesive Resins pros and cons
☺ Capable of bonding chemically to dentin ☺ Film thickness is between 13 to 20 micrometers ☺ More esthetics 😐 Acceptable biocompatibility 😐 High cost
Compomer Indications
1) Cementation of cast alloy inlays,
onlays, metal crowns, PFM, FPD
2) Contraindicated for some all-ceramic
restorations (Principle by Dentsply) ☹
Compomer Properties
1) High mechanical properties
2) Low solubility
3) Sustained fluoride release
4) Can be recharge with fluoride
Steps for bonding:
- Air-abrasion the restoration
- Etching the restoration
- Applying a silane coupling to the ceramic
- Etching the enamel (phosphoric acid)
- Applying a resin bonding agent
- Seating the restoration with resin luting agent.
Selection for ceramic or composite veneers
light-cure material
Selection for ceramic or composite inlays or onlays
a chemical or dual-cure material
Selection for full ceramic or composite crowns
chemical or dual-cure material
What are the types of crowns used at ASDOH
Gold, PFM, IPS Empress, IPS Emax,
What is the resin modified glass ionomer (RMGI) used at ADOH?
FujiCem 2
How long does it take to reach initial set of glass ionomer?
3-4 minuets, but the maturation takes 24hours. But newer formulations only take 15 minuets for maturation.
What chemicals does the acid base reaction involve when using glass ionomer?
Fluoroaluminosilicate Glass and Polyacrylic Acid
Main advantage RMGI as a luting agent
Ease of clean up
Ease of technique
Just fill the inside w/cement
Steps for adhesively bonding a crown
Etch, bond, resin cement, Silane coupler, Seat crown
The adhesive cement we use at ASDOH is…
Nexus3. It is a resin cement.
advantage of using a resin cement is…
retention of the crown is greater
What situations should an all ceramic crown be adhesively bonded?
Minimal crown thickness and insufficient wall height.
A Disadvantage to GI is…
It’s sensitive to moisture contamination
Beneficial effects of calcium hidroxide?
Accelerating the formation of reparative dentin
Cement Bases are used to…
Placed under a deep restoration to protect the pulp against thermal injury, galvanic shock, and chemical irritation.
The calcium hydroxide at ASDOH is called…
Dycal
Provisional Cements At ASDOH***
Temp Bond NE***
