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Updated: Sep 11, 2026

A Method for Studying the Temperature Dependence of Dynamic Fracture and Fragmentation
Published on: June 28, 2015
[Effect of different time intervals on the fracture strength of die stone materials]
1Department of Prosthodontics, Beijing Hospital for Stomatology, Capital University of Medical Sciences, Beijing 100050, China.
Objective:
To evaluate the fracture resistance of three types die stone materials at different time intervals.
Methods:
Maxillary master casts were made of ploymerized methyl methacrylate resins. Three types die stone materials were used. A total of 144 casts were prepared, separated and tested on the self-made testing machine at 0.5, 1.6 and 16 hours to measure the resistance to fracture.
Results:
The data were analyzed with ANOVA at alpha = 0.05 and n = 12. Results showed that the cast fracture strength was affected by cast material and setting time obviously.
Conclusion:
It is recommended that the cast setting time should be 6-16 hours.
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