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

Abstract

PURPOSEThis 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 METHODSEighty 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).RESULTSThe 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.CONCLUSIONThe shear bond strength between PEKK and resin cements was improved using non-thermal plasma treatment in combination with sandblasting.

Influence of Non-Thermal Atmospheric Pressure Plasma Treatment on Shear Bond Strength between Y-TZP and Self-Adhesive Resin Cement

“…These results are consistent with previous reports of a significant decrease in SBS due to thermocycling after NTP treatment [23,25,38]. Therefore, the SBS after NTP treatment may be affected by thermal stress, the compositions of resin cement, and low resistance to hydrolysis of the van der Waals bond [39,40]. Despite these findings, we suggest that NTP treatment probably helps to increase the initial SBS between Y-TZP and self-adhesive resin cement.…”

Polyetherketoneketone (PEKK): An emerging biomaterial for oral implants and dental prostheses

“…Unlike other adhesives, 10-methacryloyloxydecyl dihydrogen phosphate and self-etching universal adhesive containing silane (Single Bond Universal) presented efficient shear bond strength in all treatments. Similarly, the non-thermal plasma surface modification with sandblasting increased the shear bond strength between the resin cement and PEKK [50] . Universal adhesive shows similar bonding as visio-link (light-polymerizing PMMA and composite resin primer) for PEKK [47] .…”

Influence of Non-Thermal Atmospheric Pressure Plasma Treatment on Retentive Strength between Zirconia Crown and Titanium Implant Abutment

“…These findings correspond to previous studies where the bond strength of NTP-treated zirconia decreased significantly after thermocycling [ 32 , 34 , 48 ]. Thus, the RS may be associated with a low resistance to thermal stress and hydrolysis of chemical bonds following NTP processing [ 49 , 50 ]. In particular, previous studies have reported that, when resin cement comes in contact with oxygen, oxygen reacts with radical polymerization catalysts to stimulate resin monomer molecules and prevent them from binding to each other [ 51 , 52 ].…”