Evaluation of Linear Dimensional changes of Investment Material when Various Combinations of Dental Plaster and Dental Stone are used as an Investment Material

Abstract

ABSTRACT Aims To evaluate dimensional stability when various combinations of dental plaster and dental stone are used as an investment material. Context Dental plaster is routinely used as an investing material to acrylize dentures with some acceptable linear dimensional changes in the finished acrylic denture. This study aimed to evaluate which combination of dental plaster and dental stone, when used as an investment, will produce fewer linear dimensional changes in acrylic dentures. Materials and methods An aluminum block is prepared with sharp margins. The block is invested with various combinations of dental plaster and dental stone. The linear dimensional changes are measured using a digital caliper. Statistical analysis The results obtained were subjected to statistical analysis using analysis of variance test. Results Investing with 100% dental stone and a combination of 70% dental stone and 30% dental plaster showed fewer dimensional changes. Conclusion A combination containing higher percentage of dental stone may be used for investing to produce a finished denture with fewer linear dimensional changes. How to cite this article Kumararama SS, Chowdhary R. Evaluation of Linear Dimensional changes of Investment Material when Various Combinations of Dental Plaster and Dental Stone are used as an Investment Material. Int J Prosthodont Restor Dent 2016;6(1):1-5.