Resin bonding to three types of polyaryletherketones (PAEKs)-durability and influence of surface conditioning.
OBJECTIVE
The purpose of this in vitro study was to evaluate the bond strength and durability of adhesive bonding systems to amorphous and crystalline PEKK and fiber-reinforced PEEK using five types of surface conditioning methods.


METHODS
One hundred and fifty specimens of each material were conditioned mechanically and chemically, bonded with Multilink Automix to Plexiglas tubes, filled with Multicore Flow, and stored in water at 37°C for 3, 30 and 150 days. The long-term storage series were thermal cycled between 5 and 55°C for 10,000 times (30 days) or for 37,500 times (150 days) prior to tensile bond strength test (TBS). Statistical analysis was performed using Kruskal-Wallis and Wilcoxon tests with a Bonferroni-Holm correction for multiple testing (α=0.05).


RESULTS
Fiber-reinforced PEEK exhibited higher bond strengths in all five conditioning groups and at all three storage times than crystalline and amorphous PEKK, which showed lowest TBS. Highest TBS was achieved after conditioning with silica coating and priming (Rocatec Soft, Monobond Plus, Luxatemp Glaze & Bond; TBS up to 23.6MPa).


CONCLUSIONS
The conditioning method has a significant influence to the bond strength of the bonding to the amorphous and crystalline PEKKs and fiber-reinforced PEEKs.
Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany. Electronic address: gy.fu@web.de.
Gyde
G
Fuhrmann
Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.
Martin
M
Steiner
Institute of Medical Informatics and Statistics, Christian-Albrechts University, Kiel, Germany.
Sandra
S
Freitag-Wolf
Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.
Matthias
M
Kern
D001577:Benzophenones; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements; D003799:Dental Stress Analysis / Q000379:methods*; D066298:In Vitro Techniques; D007659:Ketones / Q000737:chemistry*; D008422:Materials Testing; D008689:Methacrylates; D018583:Pliability; D011092:Polyethylene Glycols / Q000737:chemistry*; D011108:Polymers; D019279:Resin Cements / Q000737:chemistry*; D013499:Surface Properties; D013718:Tensile Strength
D001577:Benzophenones; D003188:Composite Resins; D003738:Dental Cements; D007659:Ketones; D008689:Methacrylates; C076808:Monobond S; C509715:MultiCore Flow; D011108:Polymers; D019279:Resin Cements; C076811:Rocatec; C098586:luxatemp; C502351:multilink adhesive system; C063834:polyetheretherketone; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate
Bonding; Multilink Automix; PEKK; Rocatec; Tensile bond strength