ZINC PHOSPHATE

a. Formed when Zn oxide reacts with phosphoric acid.
b. Micromechanical bond with tooth structure.
c. 1st 24 hours ー irritant to pulp ∵ pH 2
d. After that ー non irritant, pH - 5.9 (24 hours) pH - 7 (48 hours )
e. Mix in maximum increments.
f. Best agent to lute metal ceramic crowns*
g. Apply varnish before ZnPh

Q. Best Luting for ceramic restorations?
Resin luting cement (HEMA+4META+organophosphates)