Effect of sulfuric acid etching of polyetheretherketone on the shear bond strength to resin cements

J Adhes Dent. 2014 Oct;16(5):465-72. doi: 10.3290/j.jad.a32806.


Purpose: To examine the influence of etching duration on the bond strength of PEEK substrate in combination with different resin composite cements.

Materials and methods: In total, 448 PEEK specimens were fabricated, etched with sulfuric acid for 5, 15, 30, 60, 90, 120, and 300 s and then luted with two conventional resin cements (RelyX ARC and Variolink II) and one self-adhesive resin cement (Clearfil SA Cement) (n = 18/subgroup). Non-etched specimens served as the control group. Specimens were stored in distilled water for 28 days at 37°C and shear bond strengths were measured. Data were analyzed nonparametrically using Kruskal-Wallis-H (p < 0.05).

Results: Non-etched PEEK demonstrated no bond strength to resin composite cements. The optimal etching duration varied with the type of resin composite: 60 s for RelyX ARC (15.3 ± 7.2 MPa), 90 s for Variolink II (15.2 ± 7.2 MPa), and 120 s for Clearfil SA Cement (6.4 ± 5.9 MPa). Regardless of etching duration, however, the self-etching resin composite cement showed significantly lower shear bond strength values when compared to groups luted with the conventional resin composites.

Conclusion: Although sulfuric acid seems to be suitable and effective for PEEK surface pre-treatment, further investigations are required to examine the effect of other adhesive systems and cements.

Publication types

  • Comparative Study

MeSH terms

  • Acid Etching, Dental / methods*
  • Benzophenones
  • Biocompatible Materials / chemistry*
  • Bisphenol A-Glycidyl Methacrylate / chemistry
  • Dental Bonding*
  • Ketones / chemistry*
  • Materials Testing
  • Microscopy, Electron, Scanning
  • Polyethylene Glycols / chemistry*
  • Polymers
  • Polymethacrylic Acids / chemistry
  • Resin Cements / chemistry*
  • Shear Strength
  • Stress, Mechanical
  • Sulfuric Acids / chemistry*
  • Surface Properties
  • Temperature
  • Time Factors
  • Water / chemistry


  • Benzophenones
  • Biocompatible Materials
  • Clearfil SA
  • Ketones
  • Polymers
  • Polymethacrylic Acids
  • RelyX ARC
  • Resin Cements
  • Sulfuric Acids
  • Water
  • Variolink
  • polyetheretherketone
  • Polyethylene Glycols
  • Bisphenol A-Glycidyl Methacrylate
  • sulfuric acid