The Effect of Translucency and Surface Treatment on the Flexural Strength of Aged Monolithic Zirconia

Table 1

Mean ± standard deviation of flexural strength of the three zirconia types (MPa) (P ≤ 0.05).

Zirconia type	Low translucent	High translucent	Multilayered system
Surface treatment
No surface treatment	884.6 ± 215.2 ^a A	863.2 ± 257.1 ^a A	273.5 ± 19.6 ^b A
Airborne particle abrasion	1110.7 ± 85.9 ^a A	1013.2 ± 66 ^a A	219.3 ± 17 ^b B

Different lowercase letters indicate differences between the types of zirconia in each surface treatment (row). Different uppercase letters indicate differences between the surface treatment methods in each zirconia system (column).