COMPARATIVE EVALUATION OF SHEAR BOND STRENGTH OF TWO DIFFERENT RESIN CEMENT TO ZIRCONIA AFTER SURFACE TREATMENT USING ER:YAG LASER: AN IN VITRO STUDY

Zirconia (ZrO₂), a crystalline dioxide of zirconium, boasts metal-like mechanical properties and a tooth-like color. Creating a ZrO₂ core for prosthetic restorations necessitates a CAD/CAM system adept at handling zirconia. Resin-bonded luting is the top choice for zirconia ceramic restorations, with tribochemical treatment preferred for surface preparation before resin cement luting. Clinical trials indicate that resin cementation improves adhesion and mechanical properties of zirconia restorations. While studies on sandblastings effect on shear bond strength to zirconia exist, more data is needed on the impact of sandblasting and laser treatment on yttria-stabilized tetragonal zirconia. This study examines the shear bond strength of two resin cements to zirconia after Er:YAG laser treatment.