|
KMID : 0362420090470010039
|
|
Journal of Korean Academy of Prosthodontics
2009 Volume.47 No. 1 p.39 ~ p.45
|
|
|
Precalcification Treatment of TiO2 Nanotube on Ti-6Al-4V Alloy
|
|
Kim Si-Jung
Bae Tae-Sung
Park Eun-Jin
Park Jin-Man
|
|
|
Abstract
|
|
|
Statement of problem: Recently precalcification treatment has been studied to shorten the period of the implant.
Purpose: This study was performed to evaluate the effect of precalcification treatment of TiO2 Nanotube formed on Ti-6Al-4V Alloy. Material and methods: Specimens of 20 × 10 × 2 mm in dimensions were polished sequentially
from #220 to #1000 SiC paper, ultrasonically washed with acetone and distilled water for 5 min, and dried in an oven at 50℃ for 24 hours. The nanotubular layer was processed by electrochemical anodic oxidation in electrolytes containing 0.5 M Na2SO4 and 1.0 wt% NaF. Anodization was carried out using a regulated DC power supply (Kwangduck FA, Korea) at a potential of 20 V and current density of 30 ㎃/㎠ for 2 hours. Specimens were heat-treated at 600℃ for 2 hours to crystallize the amorphous TiO2 nanotubes, and precalcified by soaking in Na2HPO4 solution for 24 hours and then in saturated Ca(OH)2 solution for 5 hours. To evaluate the bioactivity of the precalcified TiO2 nanotube layer, hydroxyapatite formation was investigated in a Hanks’balanced salts solution with pH 7.4 at 36.5℃ for 2 weeks.
Results: Vertically oriented amorphous TiO2 nanotubes of diameters 48.0 - 65.0 ㎚ were fabricated by anodizing treatment at 20 V for 2 hours in an 0.5 M Na2SO4 and 1.0 NaF solution. TiO2 nanotubes were composed with strong anatase peak with presence of rutile peak after heat treatment at 600℃. The surface reactivity of TiO2 nanotubes in SBF solution was enhanced by precalcification treatment in 0.5 M Na2HPO4 solution for 24 hours and then in saturated Ca(OH)2 solution for 5 hours. The immersion in Hank’s solution for 2 weeks showed that the intensity of TiO2 rutile peak increased but the surface reactivity decreased by heat treatment at 600℃.
Conclusion: This study shows that the precalcified treatment of TiO2 Nanotube formed on Ti-6Al-4V Alloy enhances the surface reactivity.
|
|
|
KEYWORD
|
|
|
Implant surface, Anodization, Nanotube, Heat treatment, Precalcification, Surface activity
|
|
|
FullTexts / Linksout information
|
|
 
|
|
|
Listed journal information
|
|
 
|