Husn A.F Jazar , Abeer A. El-Fallal, Salwa A El-Negoly And Shaymaa E Elsaka,

ABSTRACT
Objective: 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: Twenty Specimens Of Commercially Pure Titanium Plates (cp Ti) (10 ? 10 ? 1 Mm) (grade II) And Rely X Resin-based Cement Were Used In This Study. The Titanium Specimens In Each Test Were Divided Into Four Groups According To The Surface Treatment Protocol As Follows: Group1; Control, Group2; Treated With H2O2, Group3; H2O2 Activated With LED, And Group4; H2O2 Activated With CO2 Laser. The Surface Roughness Was Determined By Atomic Force Microscope (AFM). Bonding Strength Between Cp Ti And Resin Cement Was Evaluated By Using Micro-shear Test. After Debonding, An Optical Stereomicroscope And Scanning Electron Microscope Were Used To Examine The Fractured Specimens To Determine The Nature Of Failure (cohesive, Adhesive, Or Combination). Data Were Statistically Analyzed Using ANOVA And The LSD Test (�= 0.05).

Results: Surface Roughness Analysis Showed That The Surface Topography Of Cp Ti Was Affected After Treatments. There Was Significant Difference Between The Treated Groups And The H2O2 Group Activated With CO2 Laser Showed The Highest Bond Strength Followed By The H2O2 Group Activated With LED.

Conclusions: H2O2 Activated With CO2 Laser Was Proved To Be Of Beneficial Effect On Enhancing The Bond Strength With Resin Cement.