Rao Subhan, Khurram Pervaiz, Sofia Malik, Ziaullah Choudhry.
The effect of diverse water type on the water powder ratio of various dental gypsum products.
Pak Oral Dental J Jan ;36(2):331-4.

This study was performed in order to calculate the outcome of diverse type of water on the ratio of water and powder of varied gypsum products which have a key role in normal day dentistry. In this study four different water types namely distilled, mineral water (aquafina), de-ionized and slurry were selected which were used to mix with two different types of gypsum products(stone and plaster). The results show a statistically significant divergence at p ≤ 0.05 in the ratio of water and powder of gypsum products, when it was mixed with diverse water type distilled, mineral water (aquafina), de-ionized and slurry] that was used in the study. Factors which control the setting beauty of gypsum product can be divided into those, controlled by manufacturer as well as those commended by operator (water/powder ratio, mixing time , temperature, type of water used).The water necessity for the product of dental gypsum varies according to the type of water used for mixing. Among the four water types used in this study the most enunciatedecline in water necessity for gypsum products, accomplished with the slurry water.

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