The Effect of Different Storage Conditions on the Physical Properties of Pigmented Medical Grade I Silicone Maxillofacial Material

Table 4

Comparison of surface roughness mean value (Ra) for group III.

	Control group before immersion	Subgroups after immersion in storage condition
		a	b	c
Mean ± SD	0.74 ± 0.11	2.90 ± 0.44	2.51 ± 0.95	1.65 ± 0.08
^KW𝑃		0.001*
𝑃 1		0.009	0.009	0.009
𝑃 2			0.465	0.009
𝑃 3				0.028

^KW𝑃: 𝑃 value for Kruskal-Wallis test for comparing between the different studied groups.
𝑃 ₁: 𝑃 value for Mann-Whitney test between stage and each other groups.
𝑃 ₂: 𝑃 value for Mann-Whitney test between stage Basic and each other groups.
𝑃 ₃: 𝑃 value for Mann-Whitney test between Sebum and Control.
#: Significant at 𝑃≤0.008 using Bonferroni correction.