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

Figure 5

Scanning electron microscopy images of zirconia surface (magnification 1000x). (a) Zirconia surface before sintering; (b) zirconia surface after sintering; (c) Al₂O₃ sandblasting after sintering; and (d) CoJet (SiO₂-coated Al₂O₃) sandblasting after sintering. (e) Magnification 3000x, Al₂O₃ sandblasting after sintering; (f) magnification 3000x, CoJet (SiO₂-coated Al₂O₃) sandblasting after sintering.

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