Effect of casting conditions on physical properties of some experimenal partial denture alloys

Four alloys were tested which are being considered for use in making partial denture castings. The procedure was varied by using three spruing methods, two different waxes, two melt temperatures, and two different directions of filling. Statistical analysis techniques were used to determine the significance of the results. Spruing method was the most highly influencial of the variables and the flat method gave the best results. This method also is most relevant to clinical procedure. The effect of temperature, in fewer instances, was also in fluential. At a lesser level of signifiacnce direction of filling, and in one instance wax, had an effect.