Evaluation of shear bond strength between PEEK and resin-based luting material

Abstract

ObjectivesThe purpose of this study was to evaluate the bond strength of polyetheretherketone (PEEK) to resin-based luting material. MethodsEighty PEEK specimens were randomly divided into two groups (n = 40/group): no treatment and sandblasting. Each of the 40 specimens of dental gold-silver-palladium alloy (PALLAZ12-n; Yamamoto Precious Metal Co., Ltd., Osaka, Japan), zirconia (Aadva Zirconia; GC, Tokyo, Japan), and hybrid composite resin (CERASMART; GC, Tokyo, Japan) was used as a control material for PEEK. Each group was divided into four subgroups (n = 10) for the different resin-based luting materials: Panavia® V5 (Kuraray Medical, Tokyo, Japan), RelyXTM Ultimate Resin Cement (3M ESPE, St Paul, MN, USA), G-CEM Link Force (GC, Tokyo, Japan), and Super-Bond C&B (Sun Medical, Siga, Japan). The resin-based luting materials were bonded onto the specimens. All specimens were stored in distilled water at 37°C for 24h. Bond strength was measured with a shear test, and failure modes were assessed by stereomicroscopy. The surfaces were observed by scanning electron microscopy after the various pretreatments. ResultsCompared with the control group, the PEEK group showed a significantly lower (p < 0.05) shear bond strength for most of the specimens. Among PEEK groups, the most frequent failure mode was adhesive failure between the material and the resin-based luting material. ConclusionsThis study found that the bond strength between PEEK and resin-based luting materials was not adequate for clinical use of PEEK.