Evaluation of Fracture Toughness, Color Stability, and Sorption Solubility of a Fabricated Novel Glass Ionomer Nano Zirconia-Silica-Hydroxyapatite Hybrid Composite Material

Table 4

Color change () between day one (baseline) and other time intervals using repeated-measures ANOVA.

Time interval	Sample size (/group)	cGIC		GIC 5% nanoZrO2-SiO2-HA		Sig. ( value)	Std. error	95% confidence interval
		Mean ()	NBS units	Mean ()	NBS units
Day 1–day 7 ()	10	2.40	2.2	3.26	2.9	0.025	0.352	2.743
Day 1–day 14 ()		2.61	2.4	2.55	2.3	0.876	0.352	2.036
Day 1–day 28 ()		3.56	3.2	2.75	2.5	0.033	0.353	2.226

The mean difference is significant at level.