Zirkonyum oksit esaslı seramik sistemlerinde lazerle yapılan pürüzlendirmenin bağlantı gücüne etkisi
Özet
Several conventional surface treatments have been used on zirconia ceramic surface, no study investigated the effect of Nd-YAG laser. The aim of this study is to evaluate the effect of different surface treatments of shear bond strenght between DC-Zirkon and Panavia Cement. Ninety zirconia (DC-Zirkon, DCS Dental, Germany) (5x1.5 mm) and composite (Charisma/Gluma ® Comfort® Bond, Heraeus Kulzer, Hanau, Germany) cylinders (3x3 mm)were prepared. The ceramic surfaces were polished with 1 ?m diamond paste and randomly divided into nine experimental groups according to the surface treatment. Group P, control, no treatment; group SB, sandblasted with 125 ?m Al2O3; group PL1, laser1 (532 nm, 80 mJ); group PL2, laser2 (532 nm,120mJ), group PL3, laser3 (1064 nm,80mJ); group PL4, laser4 (1064 nm, 12mJ); group SBL1, sandblast+laser1; group SBL2, sandblast+laser2; SBL3, sandblast+laser3; SBL4, sandblast+laser4. The composite resin cylinders were bonded to the treated ceramic surfaces with resin luting agent (Panavia F). After the specimens were stored in distilled water at 370 C for 24 hours, their shear bonding strength was tested using a universal testing machine at a crosshead speed of 0.5 mm/min. Debonded specimen surfaces were examined with a stereomicroscope to assess the mode of failure. Two specimen for each surface treatment were prepared with the same procedures and observed by scanning electron microscopy and atomic force microscopy. Nd-YAG with 532 nm wavelenght etch increased the shear bond strength between zirconium oxide ceramic and resin luting agent (Panavia F)