The Effect of Various Types of Mechanical and Chemical Preconditioning on the Shear Bond Strength of Orthodontic Brackets on Zirconia Restorations

Figure 6

Mechanical and chemical interaction model about combined effect. (a) AL-ZPP: zirconia primer (10-MDP monomer) applied to zirconia with increased surface area by sandblasting with Al₂O₃; (b) CO-ZPP: zirconia primer applied to zirconia with less compatible surface after sandblasting by CoJet; (c) AL-SIL: silane primer applied to zirconia sandblasted with Al₂O₃; and (d) CO-SBU: Single Bond Universal applied to zirconia sandblasted with CoJet.

(a) Zirconia primer (10-MDP monomer) to zirconia sandblasted

(b) Zirconia primer (10-MDP monomer) to zirconia sandblasted with CoJet

(c) Silane to zirconia sandblasted

(d) Universal adhesive (SBU) to zirconia sandblasted with CoJet