Evaluation of Zirconia Surfaces after Strong-Acid Etching and Its Effects on the Shear Bond Strength of Dental Resin Cement

Figure 2

Scanning electron microscopy images after each surface treatment: (a) nontreatment; (b) etching for 15 min; (c) etching for 30 min; (d) treatment with 110 μm Al₂O₃ airborne-particle abrasion; (e) treatment with 110 μm Al₂O₃ airborne-particle abrasion and etching for 15 min (magnification ×2,000).

(a)

(b)

(c)

(d)

(e)