J Adv Prosthodont.  2018 Dec;10(6):408-414. 10.4047/jap.2018.10.6.408.

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

Affiliations
  • 1Department of Prosthodontics, Institute for Clinical Dental Research, Korea University Medical Center, Seoul, Republic of Korea. wddc@korea.ac.kr

Abstract

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℃ to 55℃ 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.

Keyword

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

MeSH Terms

Plasma*
Resin Cements*
Resin Cements
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