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The contact angles of each material (Co-Cr, Y-TZP, Ce-TZP/A, PEEK, and PEKK) and surface pretreatment condition (NP, non-pretreatment; SB, sandblasting pretreatment using 50 μm mean particle size alumina (Al2O3) particles; PR, primer; AP, both sandblasting and primer). Note: * significant different to other materials (p < 0.05).
