Table 3.

P-values of the internal gap pairwise comparison (p-value < 0.05, COM = resin composite, ZIR = zirconium dioxide and NPA = non-precious alloy).

Measurement Position		ZIR	NPA
marginal fit	COM	p = 0.037	p < 0.001
	ZIR		p = 0.040
axial fit	COM	p < 0.001	p < 0.001
	ZIR		p < 0.001
occlusal fit	COM	p < 0.001	p < 0.001
	ZIR		p < 0.001