Effect of different surface treatments on the shear bond strength of PAEKs to composite resin

Comparison of shear bond strength and color reproduction of two different high-performance polymers veneered with two different thicknesses of resin composite: an in-vitro study

“…All the specimens' surfaces are pretreated by air abrasion with 110 μm AL 2 O 3 particles followed by the application of Visio.link adhesive primer. Küçükekenci et al [13] revealed in their study, the importance of surface pretreatment of PEAK and its significance on the shear bond strength with resin composite veneers. Hata et al [36] concluded that the combination of MMA containing adhesive primer (Visiolink and Signum bond), and resin cement after air abrasion with alumina particles could significantly improve the bond strength.…”

“…BioHPP & PEKK polymers are of great interest for dental applications. Despite their superior properties, their opaque color is considered a limitation to be used as monolithic restorations [13].These polymers must be veneered either with ceramic (indirectly) or with resin composite (directly or indirectly), to enhance the final esthetic outcome of dental restorations.…”

Comparing the shear bond strength of veneering materials to the PAEKs after surface treatments

“…However, the inert structure and low surface energy of PAEKs are still challenging to achieve sufficient bond strength with veneer materials [8,11]. Various micromechanical and chemical surface treatment procedures have been tested on PAEKs to alter the surface characteristics for more durable and better bonding, including sandblasting(Sb) with aluminium oxide (Al 2 O 3 ) [12], tribochemical silica coating (Tbc) with silica (SiO x ) modified Al 2 O 3 [3], etching with sulfuric acid (Sa) or its mixture with hydrogen peroxide (Piranha solution) [9,13], plasma application [14,15], and laser applications [16]. The etching with Sa solution, especially in the concentration of 98%, was the most effective surface treatment technique on PEEK polymers [8,11,13,17], and favourable bonding results have also been declared for Sb and Tbc techniques on both PEEK and PEKK polymers [3,16].…”