ADA SPECIFICATION NUMBER- 96. Zinc phosphate is the oldest of the luting cements and thus serves as a standard with which newer cements can be compared

2. CONTENTS
Introduction
Classification
Availability
Mechanism
Setting Time
Properties
Manipulation
Advantages
Disadvantages
Philip's Science of Dental Materials -Anusavice 11th edition pg
no: 461-462
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3. Liner Base Luting
agent
Temporary
restoration
Philip's Science of Dental Materials -Anusavice 11th edition pg
no: 461-462
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4. •Help to protect pulp
against irritants
Small thin layer of cement –
0.5mm thick
•ZOE & Calcium hydroxide
Cement
May induce secondary caries
Liner
Philip's Science of Dental Materials -Anusavice 11th edition pg
no: 461-462
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5. Base
Much thicker layer
All properties of liner & it insulates
teeth
Insulator -A material or an object that does not easily allow
heat, electricity, light, or sound to pass through it
Philip's Science of Dental Materials -Anusavice 11th edition pg
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6. LUTING CEMENT
Insoluble in oral cavity
Non irritant to pulp
Cement Crown & Bridges
Philip's Science of Dental Materials -Anusavice 11th edition pg
no: 461-462
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7. ADA
SPECIFICATION
NUMBER- 96.
Zinc phosphate is the oldest of the luting
cements and thus serves as a standard with
which newer cements can be compared
Philip's Science of Dental Materials -Anusavice 11th edition pg
no: 461-462
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8. Zinc phosphate
Type I
FINE GRAINED
Type II
MEDIUM GRAINED
Philip's Science of Dental Materials -Anusavice 11th edition pg no: 461-462
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9. Zinc
phosphate
Powder &
liquid
Capsules
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10. Zinc phosphate
Powder
Zinc Oxide-
90.2%. >.
Principal
constituent
Magnesium
Oxide-
8.2%. >.
Aids in
sintering
Other
Oxide-
0.2%.
>.Improve
smoothness
of mix
Silica- 1.4%.
>.Filler.
liquid
Philip's Science of Dental Materials -Anusavice 11th edition pg no: 461-462
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11. Zinc phosphate
Powder liquid
Phosphoric
Acid-
38.2%.
>.React
with zinc
oxide
Water-
36.0%.
>.Control
rate of
reaction
Aluminum
Phosphate
- 16.2%.
>.Buffer
Aluminium
- 2.5%. Zinc- 7.1%
Philip's Science of Dental Materials -Anusavice 11th edition pg no: 461-462
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12. Powder
Liquid
Phosphoric
acid
attacks the
surface of
particles
Zinc
ions
Releases
Philip's Science of Dental Materials -Anusavice 11th edition pg no: 461-462
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13. Alumunium
& Zinc ion
react with
phosphoric
acid
form a zinc
aluminophosphate
gel.
H
E
A
T
EXOTHERMIC REACTION
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14. Philip's Science of Dental Materials -Anusavice 11th edition pg no: 461-462 14

15. COMPRESSIVE STRENGTH: 103.5MPa.[15,000GPa].
TENSILE STRENGTH: 5.5MPa.[800psi].
MODULUS OF ELASTICITY: 13.5GPa.
SOLUBILITY: 0.06%.
THERMAL PROPERTIES: Good Thermal Insulator
Philip's Science of Dental Materials -Anusavice 11th edition pg no: 461-462
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16. ADHESION PROPERTIES: doesn’t form a chemical bond
with enamel or dentin.
BIOLOGICAL PROPERTIES: -At the time of cementation the
pH is 2. -Starting pH is 3.5. -After 24 hours the pH is 5.5.
OPTICAL PROPERTIES: OPAQUE
Philip's Science of Dental Materials -Anusavice 11th edition pg no:
461-462
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17. Stainless
steel
spatula
clean
cool
glass slab
Mixing
Time:- 1 min.
15 sec. 3.
Philip's Science of Dental Materials -Anusavice 11th edition pg no: 461-462
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18. A large area is covered during mixing in
order to dissipate the exothermic heat
Each increments is mixed for 15-20 s
Mixing is done with stainless steel
spatula using brisk circular motion
The powder is added in small
increments
Philip's Science of Dental Materials -Anusavice
11th edition pg no: 461-462
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19. Good compressive
strength.
Good thermal
insulation ability.
Dose not dissolve
in oral fluids.
Philip's Science of Dental Materials -Anusavice19

20. No chemical
adhesion.
Pulp irritation
Poor esthetics.
Philip's Science of Dental Materials -Anusavice
11th edition pg no: 461-462
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21. Luting for
restoration.
High
strength
bases.
Temporary
restoration.
Luting for
orthodontic
bands and
brackets.
Philip's Science of Dental Materials -Anusavice 11th edition pg no: 461-46221

22. Philip's Science of Dental Materials -Anusavice 11th edition pg
no: 461-462
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23. Which one of the following dental cement
accelerates the formation of reparative dentin?
•Eugenol
•Calcium Hydroxide
•Zinc oxide
•Silica
Philip's Science of Dental Materials -Anusavice 11th edition pg
no: 461-462
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24. Which cement is irritating to the pulp?
•Carboxylate cement
•Zinc oxide-eugenol cement
•Zinc phosphate
•Ethoxybenzoic acid
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no: 461-462
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25. Most preferable cement for temporary
restoration:
•GIC
• ZOE
• Ca (OH)2
• Zinc polycarboxylate cement
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no: 461-462
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26. Frozen slab technique is applicable to:
• Zinc phosphate cement
• Glass Ionomer cement
• Zinc oxide Eugenol cement
• Resin cement
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no: 461-462
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27. A chemical reaction that gives off heat.
Exothermic reaction
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