Effect of Different Treatment Modalities on Surface Roughness and Shear Bond Strength of Veneering Composite to Polyetheretherketone-based Core Materials

Abstract

The high performance composite polyetheretherketone (PEEK), is a polymer from the main group of PAEK (polyaryletherketone). Since PEEK has many advantages in its physical, biological and mechanical properties, this composite material is used in general medicine and also in dentistry, which can be used as implant, provisional abutment and implant supported bar or clamp material. It can also be a suitable material for fixed dental prosthesis (FDPs), due to its high resiliency. It also has a high strength to weight ratio which make it more favourable for the patients, mechanically it is similar to bone and dentin properties, in addition to its zero-corrosion rate and extremely low water absorption. Successful long-term bond strength between PEEK frameworks and veneering composite is essential to mask its grey colour. However, PEEK low surface energy and chemical inertness suggests a challenge to such bond. Several studies proposed that the alteration of the PEEK surface with surface treatments and conditioning with an adhesive system enable a mechanical and chemical interaction between PEEK surface and veneering composite.

Objective: The aim of this study was to evaluate the effect of surface treatments on the surface roughness and shear bond strength of PEEK to veneering resin using two adhesives.