Influence of chairside surface treatments on the shear bond strength of PEKK polymer to veneering resin materials: An in vitro study

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

“…Several novel surface treatments are also available for the PAEKs to eliminate the toxic features of the proven acid etching techniques and also the unfavourable results of sandblasting and tribochemical silica coating on the surface integrity of the polymers [2,21,27]. The concentrated sulfuric acid solutions are risky for both chairside and laboratory applications, not only with toxic features on human and tissue health but also may cause environmental pollution [5,27]. The atmospheric cold plasma treatment with a solid, hand-operated, and portable plasma brush device is getting popular in dentistry to enhance moisture and surface-free energy by conducting the plasma energy onto the narrow application space [19].…”

“…Polyaryletherketones (PAEKs) are advanced high-performance thermoplastic resins that consist of aromatic benzene chains connected by functional ether or ketone groups [1][2][3]. While PAEK polymers are named according to the ratio of ether and ketone groups, this ratio is also responsible for the rigidity, glass conversion degree, and melting point of the polymers [4,5]. While polyetheretherketone (PEEK) is the most popular and proven resin in the PAEK family, the recently introduced polyetherketoneketone (PEKK) polymer has a higher melting point, higher compressive strength (80%) due to the improved solidifying of glass and polymer chains with higher ketone content [3,6].…”

“…The plasma may be applied withwithout heat release (thermal or cold), pressure, or gas supply (oxygen, nitrogen, argon), according to the used system [15,18]. A cold atmospheric plasma (Pls) system with hand-held devices may be used to increase the higher bond strength of polymers to resin materials by increasing the wettability and surface free energy [5,15,19]. A bonding agent application is also essential for the chemical conditioning of inert polymer materials before the veneering and cementation protocols.…”

Influence of Surface Conditioning on Bonding Polyetherketoneketone to Dental Ceramic

“…[2][3][4][5] However, due to its grayish-whitish color, when used in fixed restorations, it must be covered with veneer material in order to obtain aesthetic results. 6 While composite resin [6][7][8][9][10][11] can be used as the veneer material on PEKK, lithium disilicate glassceramic crowns 1 can also be used. There is a case study by Dawson et al in which lithium disilicate glass-ceramic crowns bonded with resin cement onto PEKK substructure.…”

“…16,18,[26][27][28] As a surface treatment, many surface roughening processes, such as sandblasting, silica coating, acid etching and plasma, were applied to the PEKK surface. [6][7][8][9][10][11]29 It has been reported in studies that the application of MMA-containing adhesive agents to the surface enables higher values in the bond strength of PAEK polymers with veneer materials (composite resin, resin cement). 13,[30][31][32][33] Although solvents such as MMA and DCM are recommended as chemical surface treatments for the bonding of plastics, 28 studies with these materials are mostly based on the bonding of denture base resin or acrylic resin teeth with heat-cured acrylic resin, autopolymerized acrylic resin and composite resin.…”