Table 3. Mean and standard deviation (SD) descriptive statistics of marginal gaps (µm) for LW, SM, and AM groups of for non-pontic 1, 16 and pontic 8, 9 area (n = 10).

Measurement area	Premolar and molar total gap						P valued
	LW		SM		AM
	Mean	SD	Mean	SD	Mean	SD
1, 16	41.69a	33.23	75.77b	30.82	68.14b	46.85	.001
8, 9	76.36a	33.89	24.40b	11.92	149.39c	42.30	.001
P valuee	.001		.001		.001

LW, lost-wax; SM, subtractive manufacturing; AM, additive manufacturing; µ-SLA, micro-stereophotography.

^a.b.cValues in rows followed by the same letters among the LW, SM and AM groups, ^dKruskal-Wallis H test, e Mann-Whitney U-test.