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. 2019 Feb 26;11(1):16–22. doi: 10.4047/jap.2019.11.1.16

Table 5. Changes of color coordinates and t-test results of each thickness between before and after glazing of materials.

Material Color coordinate 0.6 mm 1.0 mm P value
Mean SD Mean SD
EM ∆L* −2.28 1.55 −1.16 0.79 .057
∆a* −0.35 0.14 −0.01 0.12 .000*
∆b* 0.36 0.93 1.24 3.29 .426
∆E* 2.61 1.35 3.17 1.88 .452
ZP ∆L* −0.92 1.15 −1.33 1.02 .424
∆a* −0.25 0.24 −0.34 0.17 .340
∆b* 0.23 1.88 0.10 0.79 .844
∆E* 2.09 1.15 1.65 0.87 .354

EM: IPS e.max Press, ZP: IPS e.max ZirPress.

*Significantly different compared to test groups (P < .05)