Effect of Printing Layer Thickness and Postprinting Conditions on the Flexural Strength and Hardness of a 3D-Printed Resin

Table 2

The means and standard deviations of the Vickers hardness and flexural strength values found for the 3D-printed material.

Postprinting treatment conditions	3D printing thickness
	20		50		100
	FS ()	VHN ()	FS ()	VHN ()	FS ()	VHN ()
Dry storage (control)	91.51 (10.05)^a	13.23 (0.48)^a	94.40 (9.61)^a	16.23 (0.22)^a	91.51 (10.05)^a	9.31 (0.22)^a
WS for 24 h	68.38 (9.02)^b	10.68 (1.67)^a	88.25 (8.83)^b	16.63 (0.10)^a	68.38 (9.02)^b	12.71 (2.97)^a
WS for 1 month	64.37 (7.43)^b	14.86 (1.85)^a	77.67 (9.13)^bc	16.38 (0.35)^a	64.37 (7.43)^b	13.90 (0.45)^b
LC 5 min	80.80 (8.72)^ab	14.33 (0.08)^b	83.76 (10.44)^c	16.63 (0.51)^b	80.80 (8.72)^ab	12.45 (1.41)^a
LC 15 min	82.80 (9.09)^ab	15.21 (0.12)^a	91.02 (4.80)^ab	16.20 (1.10)^b	82.80 (9.09)^ab	12.93 (0.42)^ab
HC 5 min	71.32 (4.46)^bc	13.46 (0.34)^c	83.47 (12.08)^bd	17.06 (0.30)^c	71.32 (4.46)^bc	17.95 (1.09)^c
HC 15 min	64.83 (9.07)^bd	12.41 (0.35)^a	88.86 (8.03)^bd	17.66 (0.81)^d	64.83 (9.07)^bd	14.88 (0.31)^ad

FS: flexural strength; VHN: Vickers hardness. Same superscripted lowercase letters indicate groups not statistically significantly different when compared by Tukey’s multiple comparison post hoc analysis ().