الفهرس 
ContentsOnly 14 pages are availabe for public view
 |  | from | 178 |  |  |
| | | from | 178 | | |
Abstract
The aim of this study was to evaluate the effect of titanium surface treatments by H2O2 activated with LED curing light or CO2 laser irradiation on resin cement bonding. Materials and Methods:Commercially pure titanium plates (cp Ti) (10×10×1mm) (grade II) and two different types of resin based cements Rely X cement (total etch adhesive) and Maxcem elite (self etch adhesive) were used in this study. The titanium specimens in each test were divided into five groups according to the surface treatment protocol as follows: group 1; control, group 2; sandblasting, group 3; H2O2 treatment, group 4; H2O2 activated by LED, and group 5; H2O2 activated by CO2 laser. The treated surfaces were characterized by SEM, EDX, AFM and XRD. Results:The % DC was higher for total etch adhesive resin cement compared with self etch adhesive one. For micro-shear bond strength, there was significant differencebetween the treated groups and the sandblasted group showed the highest bond strength values followed by the H2O2 group activated by CO2 laser. Total etch adhesive resin cement showed the highest bond strength values compared with self etch adhesive one. Conclusions: Sandblasting and H2O2 group activated by CO2 laser were proved to be of beneficial effect on enhancing the bond strength with resin cements.