An Evaluation of the Gap Sizes of 3-Unit Fixed Dental Prostheses Milled from Sintering Metal Blocks

Table 4

Mean ± standard deviation of locations of gap for two groups with results of the Mann–Whitney test (unit: μm).

Locations		Premolar			Molar
		SMB	LWC	value	SMB	LWC	value
Margin	40	60.0 ± 21.5	67.2 ± 12.0	0.054	76.5 ± 35.2	82.9 ± 22.1	0.181
Axial wall	40	40.0 ± 14.1	57.9 ± 14.0	0.001	45.5 ± 15.3	52.8 ± 11.2	0.006
Occlusion	40	106.7 ± 28.0	84.0 ± 13.4	0.001	112.4 ± 22.4	86.1 ± 26.4	0.001

SMB: sintering metal block (experimental group); LWC: lost-wax technique + casting (gold standard group).
The results of Mann–Whitney test.