Biofilm adhesion and surface roughness of PEEK VS Monolithic Zirconium: Comparative “An In-Vitro Study”

Abstract

Background: PEEK material has been widely used recently. It serves multiple advantages being biocompatible, light material and has modulous of elasticity close to bone. It is used for fabrication of fixed partial dentures, implants abutment and superstructure. However, its surface roughness and bacterial adhesion needs further investigations. Aim: Evaluate surface roughness and bacterial adhesion of zirconia and PEEK. Materials and methods: A total of ten samples were obtained from PEEK and Zirconia where 5 samples were obtained from each material and sliced into discs. Polishing of the samples was done followed by surface roughness measurement for each disc. This was followed by incubating the samples in bacterial suspension to prepare them for bacterial adhesion testing. Results: Results showed that PEEK (0.52±0.06) had a significantly higher mean value than Zirconia (0.23±0.04) (p<0.001). Regarding bacterial adhesion test, PEEK showed higher adhesion values with 19.00±1.41, 6.20±1.30 and 5.66±0.44 for Streptococcus sangius, Streptococcus mutans and Candida albicans respectively whereas zirconia had bacterial adhesion values of 7.60±3.58, 3.60±0.55 and 2.80±0.84 for Streptococcus sangius, Streptococcus mutans and Candida albicans respectively. Conclusion: Within the limitations of this study, we concluded that Zirconia could provide smoother surfaces than that of PEEK. Moreover, bacterial adhesion on surfaces of PEEK exceeded that of Zirconia.

Surface Roughness and Bacterial Colonization Of Two Types Of Zirconia (Cubic And Gradient) After Accelerated Hydrothermal Aging. (Comparative In-Vitro Study)

“…33 Before and after sintering, the dimensions of each sample were checked using a digital caliper to exclude any possible factors that might have an impact on the final results of surface roughness and bacterial colonization. 47 Finishing and polishing were done for all samples to remove any irregularities and minor surface defects that can cause surface roughness and bacterial adhesion. 25 After polishing, all zirconia discs were glazed according to the manufacturer's instructions and to simulate the clinical condition using…”