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Table 1 Mean ± standard deviation (SD), minimum (Min), maximum (Max) and 95 % Confidence Interval (CI) for mean of light transmittance (mW/cm2) and surface roughness (mμ) values for each group according to surface conditioning methods

From: Light transmittance and surface roughness of a feldspathic ceramic CAD-CAM material as a function of different surface treatments

Groups

Light Transmittance (mW/cm2)

Surface Roughness (mμ)

Mean ± SD

Min

Max

95 % CI for mean

Mean ± SD

Min

Max

95 % CI for mean

Lower Bound

Upper Bound

Lower Bound

Upper Bound

C

456.67 ± 40.58a

395.00

545.00

430.88

482.45

0.79 ± 0.12a

0.60

0.95

0.72

0.86

HF

465.83 ± 32.53a

430.00

525.00

445.16

486.50

1.29 ± 0.10b

1.06

1.42

1.23

1.36

L

399.58 ± 37.20b

340.00

465.00

375.95

423.22

1.13 ± 0.08c

1.03

1.27

1.08

1.18

AA

382.08 ± 30.71b

325.00

420.00

362.57

401.59

2.26 ± 0.13d

2.02

2.45

2.18

2.34

  1. aC: Control; bHF: Hydrofluoric acid; cL: Laser; dAA: Air-abrasion. Different upper-case letters in each column for each condition indicates significant differences (p < 0.05)