The Linear Setting Expansions of the Dental Stone and Whose Initial Setting Times

Abstract

shortened by using various different slurry water concentrations with the changes of setting expansions of the plaster of paris and two other brands of dental stones with normal time duration by using distilled and tap water. The null hypothesis tested was that there is shortened setting time of dental stones by using various different slurry water concentrations. Methodology In this study, two improved dental stones were used to fabricate master casts and dies. The tested fabrications were BegoStone (Bego Bremer, Goldschlägerei Wilh. Herbst GmbH and Co. Wilhelm Herbst-Strabe 1 D 28359 Bremen Germany), Moldano (Heraeus Kulzer GmbH and Co. KG Gruner Weg 11 D-63450 Hanau Germany) and plaster of paris (BMT, PK 121 Sivas, Turkey). Together with the manufacturer's values, the setting time and setting expansion amounts of the dental stone and plaster used in this study are shown in Table 1. Distilled water (Hinckley and Schmidt, Chicago, Ill. USA), tap water and slurry water prepared with the volume ratio of 16% and 2% were used as liquid for mixing the dental stone and plaster. In order