Effect Of Laser And Plasma On Y-Tzp Bond Strength

This study aimed to evaluate the effects of Er:YAG laser and plasma treatment between Y-TZP and resin cement Sixty yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP) specimens were fabricated and randomly assigned to six groups (n = 10): control group (group A); Sandblasting treatment (group B); Er:YAG laser group (group C); Ar plasma group (group D); Sandblasting + Ar plasma group (group E); and Er:YAG laser + Ar plasma group (group F). The surface of each zirconia specimen was tested using a contact angle meter,profilometer, and scanning electron microscope, and the shear bonding strength (SBS) was calculated. 1.The surface roughness value of group C was 2.58 ± 0.14μm and was not significantly different from that of group F, was higher than that of group A . 2.The SBS of group B was not significantly different from that of group D . 3.The hydrophilicity, carbon and oxygen contents, and SBS of group E were similar to those of group F and significantly higher than those of groups A, B, C, and D . The Er:YAG laser and Ar plasma treatment can improve the bonding strength between zirconia and resin cement, and mechanical treatment followed by Ar plasma surface modification is more effective