Composition
What kind of cement is Zinc phosphate?
Its a Water based luting cement
What is the appearance of Zinc Phosphate?
It is a solid white color
What type of restorations is Zinc phosphate used for when luting?
A metal restoration.
What are all the materials needed for mixing Zinc Phosphate?
Zinc phosphate cement powder, Phosphoric acid & water liquid bottle, glass slab, spatula, 2x2 gauze, timer, plastic filling instrument, explorer and Baking Soda
Zinc phosphate is used to attach what to prepared teeth?
Indirect restorations
What is the boiling and melting point of Zinc phosphate?
Boiling Point: 158°
Melting point: 900°
What are some examples of what Zinc phosphate is used for, for metal restorations/procedures.
-metal supported crowns and bridges
-Orthodontic bands
-Temporary restorations
-Endodontic procedures
What are the two Consistencies that Zinc phosphate can become?
-Primary/luting Consistency
-Secondary Consistency
What kind of appliances or restorations are made outside of the mouth?
Crowns, bridges, implants, inlays, onlays, & veneers
What are the 5 characteristics of Zinc phosphate?
High solubility, Mechanical bonding, rigidity and adequate strength, Technique sensitive to purporting and mixing, and Low film thickness.
Why is Zinc phosphate not widely used for temporary restorations anymore?
It is not widely used anymore due to its solubility in saliva.
What motion must be used when mixing the Zinc phosphate mixture?
A figure 8 motion
What is the composition of Zinc phosphate? (What is it made up of?)
90% Zinc Oxide (Powder form)
10% Magnesium Oxide (Powder form)
What does high solubility mean?
can be dissolved with prolonged contact with a solvent such as saliva that may be result in a weaker hold of restoration placed.
Why is Zinc phosphate generally recommended for Orthodontic bands?
Brands of Zinc Phosphate that contain a form of stannous fluoride are generally recommended for orthodontic bands because of their anticariogenic effect from the release of fluoride
What does the glass slab do when mixing zinc phosphate?
the glass slab absorbs the heat from the exothermic reaction.
What kind of agent is Zinc oxide and Magnesium oxide? (what does it do)
Zinc oxide: soothes the area
Magnesium oxide: antimicrobial/ kills bacteria
What kind of reaction is Zinc Phosphate when mixing?
Exothermic Reaction
Why was Zinc Phosphate used in Endodontic procedures?
It was used because of the lack of chemical bonding and low pH.
-These cements provide retention through mechanical means and have no chemical bond to the post or to the dentin but provide clinically sufficient retention for posts in teeth with adequate tooth structure.
What is the working and setting time for Zinc phosphate?
Setting time: 5 1/2 minutes