In this study the effect of different surface treatments on the shear bond strength between PEEK and a composite resin was tested. Following ISO 10477 guidelines, two different PEEKs (ceramic & glass filled PEEK) were used by preparing 30 specimens of each type for 3 different surface treatment groups (reference, sandblasting and atmospheric plasma treatment). Bonding procedures started using visiolink adhesive followed by opaquer application then veneering resin. Surface roughness of the specimens was measured and scan electron microscopy (SEM) pictures was taken then thermal cycling for 5000 cycles between 5 and 55 °C in distilled water was done. Finally shear bond strength test was determined. Means and standard deviations were calculated using one-way ANOVA. Probability value (p-value) ≤ 0.05 was considered statistically significant result. Additionally, multiple comparison between different surface treatments of both types were done using POST HOC Tamhane. A statistically significant higher bond strength and surface roughness values were found only in sandblasting group in both types of PEEK. This was further confirmed with scan electron microscope. Sandblasting is still the best convenient method to provide good bonding of PEEK composites to veneering resins. Ceramic filled PEEK yielded higher bond strength than glass filled PEEK after sandblasting.
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