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KMID : 1035320190460020121
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Korean Society for Dental Materials
2019 Volume.46 No. 2 p.121 ~ p.130
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Fabrication of rough surface on titanium using electrochemical treatment in NaCl electrolyte
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Kim Bich-Na
Lee Woon-Young
Park Young-Jun
Song Ho-June
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Abstract
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It is difficult to get sufficient roughness on titanium implant surface using traditional electrochemical treatments. In this study,we have developed a new method which provides a hybrid structured titanium surface having micro/nano roughness usingelectrochemical treatment in NaCl electrolyte and hydrothermal treatment. Titanium disks were anodically oxidized (ANO) in0.15M NaCl electrolyte by applying positive electric pulses. The oxide compounds loosely attached to the surface were removedby ultrasonic cleaning (ANO group). These specimens were hydrothermally (HT) treated in an alkaline solution (ANO-HT group).
ANO group showed the dimpled grain surfaces with a diameter of approximately 30 μm, and its roughness (Ra) was about2.4 μm. The nano-sized crystallites which had an anatase TiO2 crystalline structure were uniformly distributed on the surfaceof ANO-HT group. This group still retained high roughness (~2.7 μm) similar to ANO group and showed high hydrophilicity.
Titanium surface with high roughness and hydrophilicity was fabricated using new electrochemical treating method and hydrothermaltreatment. This surface modification method could be used for enhancing the osteoconductivity of the titanium implants.
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KEYWORD
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Titanium implant, Surface modification, Roughness, Electrochemical treatment, Hydrothermal treatment
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