Table 1. Mean and standard deviation (SD) descriptive statistics of marginal and internal gaps (µm) for LW, SM and AM groups of premolar and molar total gap (n = 10).

Measurement area	Premolar and molar total gap						P valuec
	LW		SM		AM
	Mean	SD	Mean	SD	Mean	SD
Marginal gap	59.03a	37.49	50.09a	34.76	107.27b	61.33	.001
Chamfer gap	72.56a	42.31	61.43a	35.62	116.05b	57.67	.001
Axial wall gap	102.25	36.01	87.20	38.95	103.44	39.99	.117
Occlusal gap	137.37a	53.10	138.34a	44.15	238.16b	86.72	.001

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

^a.bValues in rows followed by the same letters among the LW, SM and AM groups, ^cKruskal-Wallis H test.