Oral Health and Dental Management

Effect of surface treatment of fiber post on its bond strength to resin composite core using push out test

International Conference and Exhibition on Dentistry

March 18-20, 2015 Dubai, UAE

Hiba L Gari

Posters-Accepted Abstracts: Oral Health Dent Manag

Abstract:

Objective: The aim of this study was to evaluate the effect of surface treatment of fiber post on its bond strength to resin composite core. Methods: Total of twenty posts (Unicore fiber post system) was used in this study. Posts were sectioned and randomly divided into ten groups according to the surface treatment, where all posts were etched and bonded after treatment except in the silanated groups bonding agent was applied after silanization. The groups included: Group 1: Control. Group 2: Silane. Group 3: H2o2. Group 4: H2o2 with silane. Group 5: Sandblasting. Group 6: Sandblasting with silane. Group 7: Hydrofluoric acid. Group 8: Hydrofluoric acid with silane Group 9: Potassium permanganate.Group 10: Potassium permanganate with silane. The treated posts were utilized to prepare one hundred composite resin discs where fiber post bonded in the center using specially milled brass mould. All samples were subjected to Push out test using computer controlled materials testing machine in a cross head speed 0.05 mm/min. Bond strength values were calculate, recorded, tabulated and statistically analyzed using two way analysis ANOVA, Tukey?s test and Student t test. Results: Results showed that there was statistical significant differences between test groups and control with a very high significant influence of the type of surface treatment (F=13.98; p<0.001), while a non-significant influence of silanization (F=0.604; p>0.05) on shear bond strength values. Conclusions: Under the circumstances of this study we can conclude that surface treatment of fiber post surface significantly modify its surface morphological characteristics and shear bond strength to resin composite core.