Abstract
The chipping behavior of twenty-one commercial dental stones including eleven high-strength dental stones was evaluated quantitatively using two previously reported testing methods. One method measured the average and maximum widths of chipped area cut with a rotating saw, and the other method measured the minimum thickness of a thin nubroken piece sliced with a rotating saw.
There were statistically significant differences between the products for the average width, maximum width, and minimum thickness. There was a significant difference between the groups of high-strength dental stones and other dental stones for the average and maximum widths, while there was no significant difference in minimum thickness between the two groups.
There were significant positive correlations between the average width, the maximum width, and the minimum thickness. The logarithm of cutting time statistically correlated with the average width, the maximum width, and the minimum thickness. It was suggested that the excess water present in the specimens affected the chipping behavior of dental stones.
