Nouran El-Alfy, Omnia El-Sheihy And Reham Elbasty,

ABSTRACT
Aim Of This Study: This Paper Was Done To Evaluate The Push Out Bond Strength Of Fiber Reinforced Composite Posts Luted With Self-adhesive Resin Cement After Different Surface Treatments (Er:Yag Laser, Hydrogen Peroxide, Sand Blasting).

Materials and Methods: 24 Mandibular Premolars Were Decoronated To Leave A Length Of 15 Mm Root, And The Root Canals Were Cleaned And Shaped. Root Canals Were Filled And Post Spaces Were Prepared. 24 Fiber Posts Were Divided Into Four Equal Groups According To Surface Treatment Methods As Follows: 1) Silane Only With No Surface Treatment (control Group), 2) 30% Hydrogen Peroxide + Silane , 3) Sandblasting With 50 ?m Aluminum Oxide Particles + Silane, 4) Er:YAG Laser 1.5 W +silane. Fiber Posts Were Cemented To The Root Canal Using Self-adhesive Resin Cement. Push-out Test Was Performed Using A Universal Testing Machine. The Collected Data Were Tabulated And Statistically Analyzed.

Results: Laser Treated Group Recorded The Highest Mean � SD Value Of Push Out Bond Strength (5.668042�1.16 MPa) Followed By H2O2 Treated Group Mean � SD Value (4.400203�0.87 MPa) Then Control Non-treated Group Mean � SD Value (4.379534�1.64 MPa) Meanwhile The Lowest Mean � SD Value Was Recorded With Sand-blasting Treated Group (3.466738�0.98 MPa).