Table 3.

Comparison of mean loss of height of enamel in Group III (teeth specimens against zirconia layered with E.max and glazed) and Group IV (teeth specimens against zirconia layered with E.max and polished without glaze)

Layered zirconia	Mean±SD		P
	Group LG	Group LP
Enamel wear (loss of height)	1.01±0.11	0.65±0.10	<0.001

There was a significant mean difference between the layered glazed zirconia and layered and polished zirconia with P<0.001. LG: Layered glazed zirconia, LP: Layered polished zirconia, SD: Standard deviation