There are no controlled clinical trials showing that air-abrasion affects the clinical outcome of oxide ceramic restorations negatively.
B.
There is still a controversy whether air-abrasion alters the strength of zirconia ceramic restorations.
C.
On densely sintered zirconia clinically no durable bonding was achieved using silica-coating, silane application and using a MDP containing luting resin.
D.
However, despite the use of retentive preparation design a debonding rate of 13.3% occurred within the first 53 months.