Eslam O. Sayed, Cherif A. Mohsen And Shams W. Amged,

ABSTRACT
Objective The Purpose Of This Study Was To Evaluate The Push-out Bond Strength Of Ready-made Glass Fiber Post And Custom-made E-max Pressable Post Treated With Various Surface Treatments: Sandblasting (SB), Sandblasting In Conjunction With Silica Particles Then Silane Coating (SC) And Etching Using Hydrofluoric Acid Then Silane Coating (E)

Materials and Methods: Forty Freshly Extracted Single Rooted Upper Central Incisor Teeth Were Selected. All Root Canals Were Endodontic Treatment According To Standard Procedure Then Divided Into Two Main Groups (20 Samples Each) According To The Type Of Posts Were Used. The First Group (G) Was Restored With Ready-made Glass Fiber Post (Glassix Plus Radiopaque) (n=20), The Second Group (P) Was Restored With Custom Made Pressable Ceramic (E-max Press Post) (n=20) (Ivoclar Vivadent).Each Group Was Subdivided To Four Subgroups (5 Samples Each) According To The Type Of Surface Treatment Done: Subgroup C: No Surface Treatment (control), Subgroup SB: Sandblasting With 50 �m Aluminum-oxide (AL2O3) Particles, Subgroup SC: Sandblasting In Conjunction With Silica Coating Particles Then Silane Coating And Subgroup E: Etching With 9.5% Hydrofluoric Acid Then Silane Coupling Agent. All Samples Were Sectioned By IsoMet Into 3sections (2mm Each Thickness) From Coronal To Apical Then Subjected To Push-out Test By Universal Test Machine. Then All Data Were Calculated, Tabulated, And Statistically Analyzed. Result: Readymade Glass Fiber Post Show Higher Bond Strength Than Custom Made E-max Press Post With No Significance Different Between Them Conclusion: Silica Coating Then Silanization Of Ceramic E-max Post Is The Best Surface Treatment That Increase Bond Strength .Etching With Hydrofluoric Acid Then Silanization Of Glass Fiber Post Is The Best Surface Treatment That Increase Bond Strength. Bond Strength Of Glass Fiber Post Was Higher Than Bond Strength Of Ceramic Emax Post