Table 3. Mean volumetric wear amounts of the restorative materials and their opposing enamel for 0–6 months.

Materials		Mean wear (mm3)	SD	Number of crowns
Restoration	EM	0.272057	0.1589849	7
	GC	0.451217	0.1894061	7
	VE	0.38958	0.1653977	5
	VS	0.142325	0.1412636	5
				Total: 24
Enamel	EM	0.260643	0.1657518	7
	GC	0.33915	0.1876026	7
	VE	0.39608	0.1728979	5
	VS	0.2761	0.1366608	5
				Total: 24