Effect of surface pretreatments on the surface roughness and shear bond strength of a modified polyetheretherketone (PEEK) material | ||||
| Mansoura Journal of Dentistry | ||||
| Article 2, Volume 7, Issue 4, December 2020, Page 8-16 PDF (659.11 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjd.2020.200148 | ||||
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| Abstract | ||||
| Aim of study:This study is aimed to evaluate the effect of different surface pretreatments on the surface roughness and shear bond strength of a modified polyetheretherketone (PEEK) material bonded to dentin. Materials and methods: Eighty disk shaped PEEK specimens with dimensions (10 mm X 2 mm) 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. 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 for 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. | ||||
| Keywords | ||||
| Surface roughness; air abrasion; PEEK; shear bond strength | ||||
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