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      Selective laser melting of biocompatible metals for rapid manufacturing of medical parts

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      Rapid Prototyping Journal
      Emerald

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          Binding mechanisms in selective laser sintering and selective laser melting

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            RAPID MANUFACTURING AND RAPID TOOLING WITH LAYER MANUFACTURING (LM) TECHNOLOGIES, STATE OF THE ART AND FUTURE PERSPECTIVES

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              In vitro corrosion of titanium.

              Titanium is used in dentistry for implants and frame work because of its sufficient chemical, physical and biological properties. The corrosion behaviour is from high interest to value biocompatibility. A static immersion test was undertaken with a titanium test specimen (30 mm x 10 mm x 1 mm, immersion time = 4 x 1 w, n = 3 for each series). The following parameters were investigated: specimen preparation, grinding, pH-value, different casting systems, comparison with CAD/CAM, influence of: chloride, thiocyanate, fluoride, lactate, citrate, oxalate, acetate. Atomic absorption spectroscopy was used to analyse the solutions weekly. The course of corrosion was investigated photometrically. Titanium reveals ion releases [(0.01-0.1) microg/(cm2 x d)] in the magnitude of gold alloys. There is little influence of grinding and casting systems in comparison with organic acids or pH value. The ion release increases extreme (up to 500 microg/(cm2 x d)) in the presence of fluoride. Low pH values accelerate this effect even more. Clinically, no corrosion effects were observed. Nevertheless it is recommended that it is best to avoid the presence of fluoride or to reduce contact time. In prophylactic fluoridation of teeth, a varnish should be used.
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                Author and article information

                Journal
                Rapid Prototyping Journal
                Rapid Prototyping Journal
                Emerald
                1355-2546
                August 07 2007
                August 07 2007
                : 13
                : 4
                : 196-203
                Article
                10.1108/13552540710776142
                fd2638c2-9320-4ac4-80ee-053224678441
                © 2007

                http://www.emeraldinsight.com/page/tdm

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