Surface modification of tantalum via anodization for orthopedic applications

Date

2020

Author

Uslu, Ece

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

268
views

0
downloads

Tantalum has excellent corrosion resistance and mechanical properties suitable for orthopedic applications. However, tantalum exhibits bioinert characteristics and cannot promote desired level of osseointegration with juxtaposed bone tissue. To enhance bioactivity of tantalum, nanoscale surface modification via anodization could be a potential approach. In this study, tantalum foils were modified to obtain surface features with different morphologies, i.e. nanotubular, nanodimple, nanoporous and nanocoral, via anodization. By controlling anodization parameters including voltage, anodization duration, temperature and electrolyte concentration, surface feature sizes were precisely fine-tuned in the range of 20-140 nm. In this thesis, anodized tantalum samples were characterized to investigate physical and chemical properties of their surfaces, i.e. morphology, crystallinity, hydrophobicity, topography and chemistry. The results indicated that anodized tantalum surfaces consisted of Ta2O5 and non-stoichiometric tantalum oxide. Upon the anodization, surface area of the tantalum samples increased up to 2 folds, which was accompanied by up to 3.5 folds increase in the nanophase surface roughness. Initial results indicated enhanced fibroblast proliferation and spreading on nanoporous tantalum surfaces in vitro. In line with that study, anodized nanotubular, nanodimple and vi nanocoral tantalum and non-anodized tantalum surfaces were interacted with bone cells in vitro. Biological studies showed that anodized tantalum surfaces significantly enhanced protein adsorption and, at the same time, improved bone cell proliferation and spreading in vitro independent of the anodized surface morphology and feature size.

Subject Keywords

Tantalum., Tantalum, anodization, surface morphology, topography, orthopedics

URI

http://etd.lib.metu.edu.tr/upload/12625536/index.pdf
https://hdl.handle.net/11511/45776

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Nanofeature Size and Morphology of Tantalum Oxide Surfaces Control Osteoblast Functions USLU, ECE; Mimiroğlu, Didem; Ercan, Batur (2021-01-01) Tantalum is one of the most corrosion-resistant materials and has mechanical properties that are suitable for orthopedic applications. However, tantalum exhibits bioinert characteristics and cannot promote the desired level of osseointegration with juxtaposed bone tissues. To enhance the bioactivity of tantalum, nanoscale surface modifications via anodization could be a potential approach. In this study, surface features having nanotubular, nanodimple, and nanocoral morphologies were fabricated onto tantalu...
Fracture Toughness of Wire Arc Additive Manufactured Duplex Stainless Steel Grade 2509 Ersan, Rauf Batuhan; Gür, Cemil Hakan; Yurtışık, Koray; Department of Metallurgical and Materials Engineering (2023-1) There are two significant benefits of duplex stainless steels as being corrosion resistant and having enhanced mechanical properties. In virtue of these advantages, they are suitable for industries that deal with aggressive environments. Additive manufacturing is a promising technology as it has considerable amount of advantages. Practicality of wire arc additive manufacturing technique, which is an influential method in term of cost and deposition efficiency, for this grade was researched in this study. Th...
Mechanical properties of Ti6Al4V parts produced by electron beam melting and topology optimization in different building directions Temel Yiğitbaşı, Selen; Konukseven, Erhan İlhan; Gülcan, Orhan; Department of Mechanical Engineering (2018) Titanium and its alloys are used in various industries due to their mechanical properties such as high corrosion resistance, high strength and low-density. However, utilization of parts made of titanium are limited since the lead time for raw material is long, they are hard to machine, and the machining costs are high. On the other hand, it is possible to produce complex parts with powder material by additive manufacturing techniques, and there is a growing interest in research on these new technologies. El...
Structural Properties of Electrolytic Nickel Deposits Produced By Direct Pulse and Pulse Reverse Currents in the Organic Free Watts Electrolytes Arslan, Burcu; Karakaya, İshak (null; 2015-05-01) Nickel plating is one of the most frequently used surface treatments because of good chemical, mechanical, magnetic, optical and electrical properties of coatings. The major application areas include corrosion protective coatings, bright underneath coatings, diffusion barrier coatings and electroforming. Each one of these applications require different characteristics for the electrodeposits. Therefore, numerous studies were performed to see the effects of plating parameters on the final characteristics of ...
Coating of bismuth and carbonate doped hydroxyapatite on acid etched Ti6Al4V via biomimetic method; investigation of mechanical, structural and biological properties Hacıoğlu, Tuğçe; Evis, Zafer; Aydınol, Mehmet Kadri; Department of Micro and Nanotechnology (2018) Titanium and its alloys are used in both engineering and dental applications. Ti6Al4V alloy is one of the most commonly preferred titanium alloy used in medical industry. Ti6Al4V with hydroxyapatite (HAp) coating has been frequently used material combinations. Though coating Ti6Al4V with HAp does not provide the desired amount of biocompatibility, it is significant to coat doped HAp on titanium alloy with antibacterial properties. In this thesis, first of all best experimental conditions for pre-treatment a...

Citation Formats

E. Uslu, “Surface modification of tantalum via anodization for orthopedic applications,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Metallurgical and Materials Engineering., Middle East Technical University, 2020.