Effect of non-thermal plasma on the shear bond strength of resin cements to Polyetherketoneketone (PEKK)

Wilmart Labriaga, So Yeon Song, Jin Hong Park, Jae Jun Ryu, Jeong Yol Lee, Sang-Wan Shin

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PURPOSE. This study aimed to assess the effect of non-thermal plasma on the shear bond strength of resin cements to polyetherketoneketone (PEKK) in comparison to other surface treatment methods. MATERIALS AND METHODS. Eighty PEKK discs were subjected to different surface treatments: (1) Untreated (UT); (2) Non-thermal plasma (NTP); (3) Sandblasting with 50 μm Al2O3 particles (SB); and (4) Sandblasting + Non-thermal plasma (SB+NTP). After each surface treatment, the contact angle was measured. Surface conditioning with Visio.Link was applied in all groups after pre-treatment. RelyX Unicem resin cement was bonded onto the PEKK specimens. After fabrication of the specimens, half of each group (n=10) was initially tested, while the other half was subjected to thermocycling (5°C to 55°C at 10,000 cycles). Shear bond strength (SBS) testing was performed using a universal testing machine, and failure modes were assessed using stereomicroscopy. The SBS results were analyzed statistically using one-way ANOVA followed by Tukey's post hoc test. Independent t-test was used to examine the effect of thermocycling (P < .05). RESULTS. The highest SBS values with or without thermocycling were observed with PEKK specimens that were treated with SB+NTP followed by the SB group. The lowest SBS results were observed in the UT groups. CONCLUSION. The shear bond strength between PEKK and resin cements was improved using non-thermal plasma treatment in combination with sandblasting.

Original languageEnglish
Pages (from-to)408-414
Number of pages7
JournalJournal of Advanced Prosthodontics
Issue number6
Publication statusPublished - 2018 Dec 1



  • Non-thermal plasma
  • Plasma
  • Polyetherketoneketone (PEKK)
  • Resin cements
  • Shear bond strength

ASJC Scopus subject areas

  • Oral Surgery
  • Dentistry (miscellaneous)

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