Reinforced dental plaster with low setting expansion and enhanced microhardness

Bulletin of the National Research Centre

Table 2 The mean, standard deviation values and results of one-way ANOVA and Tukey’s HSD test for comparison between surface microhardness, compressive strength, and dimensional changes of the groups

Groups
Mean	Conventional dental plaster	Reinforced dental plaster	Improved stone	P value
Surface microhardness (VHN)	64.4 ± 3.8^a	124.3 ± 4.9^b	123.1 ± 4.4^b	≤ 0.001*
Compressive strength (MPa)	7.8 ± 0.3^a	70 ± 2.1^c	37.4 ± 1.8^b	≤ 0.001*
Dimensional changes (mm)	0.12 ± 0.01^c	0.06 ± 0.01^a	0.11 ± 0.01^b	≤ 0.01*

Mean with different letters in the same row indicates statistically significance difference
*Significant (p < 0.05)