Rational durability of optical properties of chameleon effect of Omnichroma and Essentia composite thermocycled in black dark drinks (in vitro study)

Bulletin of the National Research Centre

Table 2 The change in color (ΔE) values after TC 2500 and 5000 of Omnichroma and Essentia composite

Immersion solutions	DW Mean ± SD		Coffee Mean ± SD		Cola Mean ± SD		p-value
No.of cycles	2500	5000	2500	5000	2500	5000	p-value
Omnichroma	6.76 ± 0.66	7.96 ± 0.61	27.98 ± 4.20	35.80 ± 4.13	10.49 ± 2.21	16.44 ± 0.87	< 0.001*
Essentia	4.03 ± 0.72	5.58 ± 1.64	14.67 ± 1.73	16.07 ± 2.26	6.36 ± 2.25	7.98 ± 0.97	< 0.001*
p-value	< 0.001*				0.010*	< 0.001*