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37 Cards in this Set
- Front
- Back
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Bonding substances available in the form of two components that are mixed together immediately before use, setting to a hard mass |
Dental cements |
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Uses of dental cement |
Cementing ○ inlays and crowns ● Luting agents for orthodontic bands ● Insulating base ● Temporary or permanent restorations ● Root canal filling ● Capping materials for exposed pulp ● Surgical dressing / Periodontic bandage |
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Composition of Zinc Phosphate |
Powder Liquid |
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What is the composition of zinc phosphate in powder? |
● Zinc Oxide ● 10% Mg (Magnesium) ● Small amount of other oxides (Bismuth & Silica) |
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What is the composition of liquid in zinc phosphate? |
● Phosphoric Acid ● Water - 33% +- 5% |
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Classification of zinc phospate |
Type 1 Type 2 |
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Fine grain cement |
Type 1 |
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Medium grain cement |
Type 2 |
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Factors affecting time of dental cements |
Controlled by the manufacturers
Controlled by the dentist |
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Classification of dental cements when it comes to controlled by the manufacturers |
Composition and sintering temperature of the powder |
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Factors affecting setting time by controlled by the dentist |
Temperature during mixing Rate of adding powder to liquid |
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The faster you put the powder in liquid |
The faster the setting time |
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How will you increase/ decrease the setting time of dental cement? (using temperature to control) |
Put the slab inside the refrigerator. But it should not collect moisture, it should not beyond dew point. |
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A combination of silicate and ZnPO4 |
Zinc Silicophosphate |
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Silicate cement |
Zinc silicophosphate |
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translucent and has anticariogenic properties of fluoride. |
Zinc silicophosphate |
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Used for cementation of precision casting |
Zinc silicophosphate |
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Composition of zinc silicophosphate |
Powder - ZnO ; Silicate Liquid - Phosphoric acid |
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Silver salts or Cu oxides are added to the powder of Zinc Phosphate |
Copper cements |
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Increase antiseptic properties |
Copper cements |
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Colors maybe in Copper cements |
Black White / green Red |
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Manipulation in copper cements |
Same with ZnPO4 |
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Common cement that we used in dentistry |
Zinc oxide Eugenol |
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ZOE pH? |
pH 7-8 so basic |
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Strength of ZOE |
140 kg./sq.cm. (2,000 Ibs./sq.) |
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Composition of ZOE |
The powder composed of: Zinc oxide Liquid composed of: Eugenol |
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4 types of ZOE |
Type I - temporary cementation Type II - permanent cementation of restorations or appliances fabricated outside the mouth Type III - as temporary filling material as an insulating base Type IV - as cavity liners
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Improved ZOE Also called as: |
Reinforced Fortified Modified |
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Least irritating of the dental cements |
Improved ZOE |
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Exerts a palliative effect on the pulp |
Improved ZOE |
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most common portifydra in ZOE.
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Intermediate Restorative Material |
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When you mix ZOE you have to prepare: |
Eugenol Liquid Intermediate Restorative material (IRM) |
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Water-soluble low-molecular-weight polymers of acrylic or methacrylic acid that form solid, insoluble products when mixed with specially prepared ZnO powder. |
Polycarboxylate cement |
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Very seldom na ginagamit. |
Polycarboxylate cement |
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Powder / Liquid system |
Glass ionomer |
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Two Types of Glass Ionomer |
Type I - fine grained; suitable for casting Type II - for restoration |
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Cement that don’t use it anymore. |
Silicate cement |
