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The effect of different surface treatments on the bond strength between PEEK and maxillofacial silicone elastomer

Purpose: The intraoral applications of PEEK(polyetheretherketone) are rare, and to the authors’ best knowledge, no extraoral application has been reported. Moreover, the bonding mechanism is not known between silicones and PEEK. The aim of this study is to evaluate the effect of surface treatments on PEEK to be bonded to maxillofacial silicone elastomers. Materials and Methods: The study has been supported by Gazi University Projects of Scientific Investigation (BAP) with 6284 Project ID. A total of 40 PEEK specimens were fabricated. Specimens were conditioned by one of the following methods and divided into 5 study groups (n=7) as follows: Group1 was served as the control group, and silicone primer was applied to the specimens. Group2, silica-coating with 30 µm Al2O3 particles; Group3, argon plasma application for 1 min; Group4, mechanical abrasion with sandpapers; Group5, 2W nano-laser application. Surface topographies of one specimen from each group were observed by scanning electron microscopy (SEM) after surface treatments. Surface roughness values were evaluated with a digital profilometer. A platinum-based maxillofacial silicone elastomer was poured onto the surface treated PEEK specimens. Results: Surface roughness median values were 0.74 Ra (0.23;1.08) for control; 0.74 Ra (0.69;0.92) for sandpaper; 0.90 Ra (0.58;4.0) for laser; 1.05 Ra (0.69;1.93) for sandblasting; 0.88 Ra (0.77;1.25) for plasma treatments respectively. Conclusion: According to the surface treatments on PEEK specimens, surface roughness values of sandblasted specimens were higher than that of plasma or laser-treated specimens. Furthermore, sandblasted, plasma or laser-treated specimens had higher surface roughness values than that of groups control and mechanical abrasion.

pinar cevik
Gazi University
Turkey

arzu zeynep yildirim
gazi university
Turkey

emine hulya demir sevinç
gazi university
Turkey

aykut gonder
gazi university
Turkey

Sudarat Kiat-Amnuay
UTHealth School of Dentistry at Houston
United States

 


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