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. 2016 Jan 14;11(1):e0147077. doi: 10.1371/journal.pone.0147077

Fig 1. SEM images of the bonding surfaces of zirconia ceramic and cobalt-chromium (Co-Cr) alloy subjected to different surface treatments before shear test.

Fig 1

(A) Polish with abrasive paper; (B) Sandblasting; (C) Ultrasonic cleaning after sandblasting.