Zinc phosphate dental luting cement as hardward cement. Zinc Phosphate Cement. Three groups of (GC Elite cement 100) with different expiry dates were tested for compressive strength using a universal testing machine (crosshead speed 1 mm/min: load cell of 250 kgF). Elite 100 is unbeatable in terms of its physical properties such as strength, film thickness and low solubility.
The results showed that there was a significant difference (p<0.05) between the compressive strengths of zinc phosphate cement. Group III (2 months before expiry date). Group I (2 years and 5 months before expiry date), and group II (11 months before expiry date).