In vitro study of effects of aging and processing conditions on colour change in maxillofacial silicone elastomers

Table 4 Comparison of ∆L*values for all study groups

Molding-stone colour	∆L* values	100 °C group	25 °C group	^ap_diff.
Molding-stone colour	∆L* values	Mean ∆L* ± sd	Mean ∆L* ± sd	^ap_diff.
Control	∆L*	−2.94 ± 4.61	− 0.26 ± 4.01	0.308
Control	^cp	0.179	0.879	0.308
Yellow	∆L*	2.10 ± 3.64	−0.92 ± 2.20	0.038*
Yellow	^cp	0.101	0.221	0.038*
Green	∆L*	3.37 ± 2.90	0.04 ± 3.10	0.023*
Green	^cp	0.005*	0.971	0.023*
White	∆L*	7.41 ± 5.16	−1.72 ± 2.21	< 0.001*
White	^cp	0.001*	0.037*	< 0.001*
Blue	∆L*	−0.55 ± 3.65	1.16 ± 1.94	0.209
Blue	^cp	0.647	0.092	0.209
Reddish-Brown	∆L*	0.73 ± 2.35	−0.90 ± 3.04	0.196
Reddish-Brown	^cp	0.349	0.374	0.196
^bp		F:7.583, p < 0.001*	F: 1.308, p: 0.276
^‡Post-hoc		p	p
Control vs. yellow		0.187	0.999
Control vs. green		0.031*	0.999
Control vs. white		< 0.001*	0.999
Control vs. blue		0.999	0.999
Control vs. reddish-brown		0.972	0.999

^aIndependent sample t-test, ^bOne-way ANOVA, ^cPaired t-test, ^‡Bonferroni-corrected p values,*p < 0.05, sd: standard deviation
P-values set in boldface indicate statistical significance

ISSN: 1472-6831