Results 121 to 130 of about 470 (161)
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Influence of Surface Conditioning on Bonding Polyetherketoneketone to Dental Ceramic
ECS Journal of Solid State Science and Technology, 2022This study researched the effects of different surface conditioning techniques on the bond strength of polyetherketoneketone (PEKK) with lithium disilicate glass-ceramic material. Total of 105 test specimens were prepared from PEKK discs and randomly distributed into 5 experimental groups (n = 21) to which different surface conditioning techniques were
Gulfem Ergun, Bahar Tekli
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International journal of computerized dentistry, 2023
AIM The aim of the present study was to compare the load bearing capacity of monolithic or bilayered single crowns with zirconia or polyetherketoneketone frameworks designed and fabricated using CAD/CAM systems. MATERIALS AND METHODS Cr-Co-based metal dies (n = 60) were duplicated from an extracted and prepared premolar and then restored with different
Seckin, Özge +2 more
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AIM The aim of the present study was to compare the load bearing capacity of monolithic or bilayered single crowns with zirconia or polyetherketoneketone frameworks designed and fabricated using CAD/CAM systems. MATERIALS AND METHODS Cr-Co-based metal dies (n = 60) were duplicated from an extracted and prepared premolar and then restored with different
Seckin, Özge +2 more
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Hydroxyapatite whisker-reinforced polyetherketoneketone bone ingrowth scaffolds
Acta Biomaterialia, 2010Hydroxyapatite (HA) whisker-reinforced polyetherketoneketone (PEKK) bone ingrowth scaffolds were prepared and characterized. High levels of porosity (75-90%) and HA whisker reinforcement (0-40 vol.%) were attained using a powder processing approach to mix the HA whiskers, PEKK powder and a NaCl porogen, followed by compression molding at 350-375 ...
Gabriel L, Converse +3 more
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Preparation and properties of bisphenol A polyetherketoneketone based phthalonitrile resins
Journal of Applied Polymer Science, 2023AbstractA promising high temperature phthalonitrile (PN) resin composed of a polyetherketoneketone (PEKK) core bridged by two bisphenol A linkers and end capped with PN groups is presented. This PEKK‐PN resin was characterized via differential scanning calorimetry, thermogravimetric analysis, proton nuclear magnetic resonance spectroscopy, scanning ...
Loren C. Brown +4 more
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Wear of polyetherketoneketones — Influence of titanium dioxide content and antagonistic material
Dental Materials, 2018The aim of this laboratory study was to analyze the influence of titanium dioxide (TiO2) content and antagonistic material on the wear of polyetherketoneketones (PEKKs).Twenty-four disk-shaped specimens of two PEKK materials containing either 10wt% or 20wt% TiO2 particles (P10 and P20) were dynamically loaded in a chewing simulator with 49N and ...
Thomas, Kewekordes +2 more
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Biofilm formation on metal alloys, zirconia and polyetherketoneketone as implant materials in vivo
Clinical Oral Implants Research, 2020AbstractObjectivesThis study investigated biofilm formation on discs of metal alloys, zirconia and polyetherketoneketone in vivo.Material and MethodsSixteen healthy volunteers conducted two runs of 24 hr each wearing an intraoral splint with 15 discs representing five different materials (gold‐based [EL] and silver‐based [PA] noble metal alloys ...
Barbara Zeller +6 more
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Preheat Compression Molding for Polyetherketoneketone: Effect of Molecular Mobility
Chinese Journal of Polymer Science, 2021Polyetherketoneketone (PEKK) is a new evolving polymeric material, and is considered as another important member of the polyaryletherketone (PAEK) family in addition to polyetheretherketone (PEEK). Hot compression molding can be used to compact and consolidate the PEKK products, where the temperature and pressure play key roles to affect the molecular ...
Xiao-Hua Zhang +8 more
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Mechanical properties of hydroxyapatite whisker reinforced polyetherketoneketone composite scaffolds
Journal of the Mechanical Behavior of Biomedical Materials, 2009The apparent mechanical properties of hydroxyapatite (HA) whisker reinforced polyetherketoneketone (PEKK) scaffolds were evaluated in unconfined, uniaxial compression to investigate the effects of the porosity (75%, 82.5% and 90%), HA content (0, 20 and 40 vol%) and mold temperature (350, 365 and 375 ( composite function)C). Increased porosity resulted
Gabriel L, Converse +2 more
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Taguchi optimization of 3D printed short carbon fiber polyetherketoneketone (CFR PEKK)
Journal of the Mechanical Behavior of Biomedical Materials, 2023In this study, the Taguchi method was utilized to optimize fused filament fabrication (FFF) additive manufacturing with the goal of maximizing the flexural strength of 3D printed polyaryletherketone specimens. We analyzed 3D printed (3DP) carbon fiber reinforced poly-etherketoneketone (CFR PEKK), 3D printed and pressed (3DP + P) CFR PEKK, and injection
Aliza Rabinowitz +4 more
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New adhesive protocol improves shear bond strength of Polyetherketoneketone (PEKK)
Dental MaterialsInert surface of Polyetherketoneketone (PEKK) jeopardizes resin bonding. This study aimed to present a new adhesive protocol to improve PEKK bonding.A total of 360 PEKK blocks were milled, polished (maximum roughness of 0.20 µm), and randomly assigned to groups. The new protocol was applied (n = 36) and compared to conventional treatments (no treatment;
, Kusai Baroudi, Lais Duarte
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