Table 3.

Annual comparison between enamel-enamel controls and enamel opposing 3Y-TZP using linear-mixed regression analysis

	Maximum wear depth [µm]			Mean wear depth [µm]			Wear area [mm²]
Recall	Estimate	95% CI	p-Value	Estimate	95% CI	p-Value	Estimate	95% CI	p-Value
1	-75	-174, 24	0.130	-34	-58, -10	0.008	-2.3	-8.9, 4.4	0.500
2	-73	-174, 28	0.150	-19	-39, 0.13	0.051	-0.14	-5.8, 5.5	> 0,900
3	-132	-205, -59	0.001	-32	-48, -16	< 0,001	4.5	0.49, 8.5	0.031
4	-92	-181, -3.3	0.043	-25	-48, -2.6	0.031	5.0	-1.5, 11	0.120
5	-94	-189, 2.1	0.055	-23	-46, -0.61	0.045	4.0	-2.5, 10	0.200