Editorial Type:
Article Category: Other
 | 
Online Publication Date: 01 Oct 2015

Bioactivity and Surface Characteristics of Titanium Implants Following Various Surface Treatments: An In Vitro Study

MDS,
MDS,
MSc, PhD,
MSc, PhD,
PhD,
MSc, PhD,
MPH, MS, MHSA, DrPH,
BDS,
PhD, and
MDS, PhD
Page Range: e183 – e188
DOI: 10.1563/aaid-joi-D-13-00292
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This study compared the surface topography, hydrophilicity, and bioactivity of titanium implants after 3 different surface treatments (sandblasting and acid etching, modified sandblasting and acid etching, and thermal oxidation) with those of machined implants. One hundred indigenously manufactured threaded titanium implants were subjected to 3 methods of surface treatment. The surface roughness of the nontreated (Group A) and treated samples (Groups B through D) was evaluated with a scanning electron microscope (SEM) and profilometer. The wettability was visually examined using a colored dye solution. The calcium ions attached to the implant surface after immersing in simulated body fluid (SBF) were assessed on days 1, 2, and 7 with an atomic electron spectroscope. The data were analyzed statistically. The SBF test allowed the precipitation of a calcium phosphate layer on all surface-treated samples, as evidenced in the SEM analysis. A significantly higher amount of calcium ions and increased wettability were achieved in the thermally oxidized samples. The mean roughness was significantly lower in Group A (0.85 ± 0.07) compared to Group B (1.35 ± 0.17), Group C (1.40 ± 0.14), and Group D (1.36 ± 0.18). The observations from this in vitro study indicated that surface treatment of titanium improved the bioactivity. Moreover, results identified the implants that were sandblasted, acid etched, and then oxidized attracted more calcium ions.

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  <sc>Figure 1</sc>
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Figure 1 .

The method of assessment of the wettability of the implant surfaces. Note the difference in the area covered by the colored dye solution: (a) Machined control group. (b) Sandblasted and acid-etched group. (c) Modified sandblasted and acid-etched group. (d) Sandblasted, acid-etched, and thermally oxidized group.


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  <sc>Figure 2</sc>
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Figure 2 .

The Ca concentrations obtained from the different surface treatments after soaking time in simulated body fluid for 1, 2, and 7 days. (a) Machined control group. (b) Sandblasted and acid-etched group. (c) Modified sandblasted and acid-etched group. (d) Sandblasted, acid-etched and thermally oxidized group.


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  <sc>Figure 3</sc>
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Figure 3 .

SEM images of the surface-treated titanium implant samples at ×1000 magnification (a) Machined control group. (b) Sandblasted and acid-etched group. (c) Modified sandblasted and acid-etched group. (d) Sandblasted, acid-etched and thermally oxidized group.


Contributor Notes

Corresponding author, e-mail: nimmibaksu@gmail.com
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