II.Temporary cementation of cast crowns and bridges or cementation of temporary restorations 2

Used for direct and indirect pulp capping and as a protective barrier beneath composite restorations

Addition of spherical amalgam alloy Type I GIC powder is called

Zinc Phosphate Cement powder 4 compositions

Manner of dispensing: 2-paste form / single paste (LC)

Zinc Phosphate Cement Manipulation:

to coat the dentin; i.e. Ca (OH)2 in a suspension

Functions of celluloid strip: 4

permanent cementing or luting agent

Hybrid GIC

Commercial names of ZnPO4 cements 4

Zinc Polycarboxylate Cements / Zinc Polyacrylate 5 Commercial Names

The retention or restorations on prepared teeth is a major function of

tooth debris left in cavity, is removed before GIC is used. Use 50% citric acid apply for 15-30 seconds the wash with water then dry.

silicone grease painted on the surface to prevent moisture contamination.

does not need a cavity liner molecular weight of liquid is very high so that it cannot pass through tubules

gives strength

Final cementation or cast crowns and bridges 5

High strength bases 4

are not cements but are used in conjunction with cements to provide pulp protection from irritants i.e. resin in a solvent

principal powder component

Ca (OH)2 in a suspension

Low strength bases or liners 3

IRM (Intermediate Restorative Material), Temrex, Extra, Fynal

Temp-bond, Tempak, Nogenol

Calcium Hydroxide Cement

P/L 1.6:1 Mixing time: 20 seconds until it has a mousse-like consistency Working time: 2.5 minutes Bond strength: 14 MPa

Temporary fillings or to provide thermal insulation and mechanical support to teeth restored with other materials such as amalgam and gold. 4

incorporated to improve cement strength; increase fracture toughness; increase wear resistance

resin in a solvent

temporary cement, temporary filling material

The cement shrinks much more when it is in contact with air than when it is under water. Thus the cement must not be allowed to dry out.

bismuth, silica

did not contribute to inflammation of gingival tissues.

Silicate Cements Factors that control setting time: All these will prolong the setting time 3

provide protection to the pulp from irritants or as pulp-capping agents

highly acidic; needs a cavity liner to block acid

Calcium Hydroxide Cement

provide protection to the pulp from irritants or as pulp-capping agents; i.e. Ca (OH)2 (self & light-cured), GIC, ZOE

Properties Acidity Solubility and disintegration Retention