The effect of different concentrations of gilvest with water on the setting time of phosphate-bonded investment

الملخص EN

Objective : To identify of the effect of the different concentrations of the special liquid (for mixing the investment, Gilvest) and with water/powder ratio on setting time of phosphate-bonded investment.

and materials: The present study is (60) specimens made from phosphate bonded investment divided into (4) groups ontrol and experimental groups), (15) specimens for each group.

The Gillmore needle device is used to setting hosphate bonded investment mixed with different concentration of Gilvest and water.

Showed that there is a high significant difference (PO.01) between each groups in the ANOVA test and a it difference (P<0.05) between the group (A) and control group in the LSD test.

endations: using other concentration of Gilvest (0.3ml) mixed with water (0.2ml) and powder (15g) on the setting he phosphate-bonded investment.

We can use another type of powder (gypsum-bonded investment) with the t different concentrations.