الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
This study is aimed to evaluate the effect of different surface pretreatments on the surface properties and bond strength of a modified polyetheretherketone (PEEK) material, regarding Surface roughness, Surface topography, Surface elemental composition, and Shear bond strength to dentin. Materials and methods : Eighty-eight disk-shaped PEEK specimens were machined and allocated into 4 pretreatment groups, group 1; no treatment, group 2 ; etching with 98% sulfuric acid for 1 min, group 3 ; air abrasion with 50 µm Al2O3, and group 4 ; nitrogen plasma treatment. Surface roughness (Ra) was determined by a profilometer. Surface morphology and elemental composition of specimens were evaluated using SEM and EDX, respectively. Shear bond strength (SBS) to human dentin was tested using a universal testing machine at a crosshead speed of 1mm/min perpendicular to the bond interface. Data were statistically analyzed using ANOVA and Tukey’s HSD, α = 0.05. Results : Air abrasion with 50 μm alumina significantly increased the surface roughness (P<0.001). The highest shear bond strength values were observed in sulfuric acid-etched group. Conclusions : A modified PEEK material strengthened with 20% submicron ceramic fillers, could be treated by etching with 98% sulfuric acid for 1 min, to enhance bond strength to human dentin.