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

Figure 4

Stereomicroscopic images (12x magnification) of debonded zirconia surface. The representative images from the 12 groups were selected by modified ARI score. ((a), (b), (c), and (d)) Silane application on zirconia ((a) AL-SIL-N, (b) AL-SIL-T, (c): CO-SIL-N, and (d) CO-SIL-T); ((e), (f), (g), and (h)) Zirconia Prime Plus application on zirconia ((e) AL-ZPP-N, (f) AL-ZPP-T, (g) CO-ZPP-N, and (h) CO-ZPP-T); ((i), (j), (k), and (l)) Single Bond Universal application on zirconia ((i) AL-SBU-N, (j) AL-SBU-T, (k) CO-SBU-N, and (l) CO-SBU-T).

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