Table 2.

Results of antagonistic wear produced by zirconia and PEEK crowns.

Antagonist Wear (mm2) (Post-Wear)	Material		Wilcoxon–Mann–Whitney U Test
	Zirconia	PEEK	W	p Value
Mean (SD)	6.17 (0.92)	2.50 (0.60)	144.00	<0.001 *
Median (IQR)	6.33 (0.94)	2.62 (1)
Range	4.25–7.5	1.5–3.5

SD = standard deviation, IQR = interquartile range. * Significant differences at p value < 0.05.