| Summary: | 碩士 === 國立虎尾科技大學 === 材料科學與工程系材料科學與綠色能源工程碩士班 === 107 === Comparison with polymer or ceramic materials, metal has higher mechanical strength. It is widely used in biomedical materials, such as orthopedic implant and fixing devices. Currently, medical implants were generally produced in large quantities and standardization for reducing the cost. However, these are not customized for individual patients, which may bring on some side medical effects not as expected. The technique of metal additive manufacturing (AM), unlike traditional processing techniques of subtraction, is highly concerned in recent years processed by stacking method to solve the bottlenecks and limitations of traditional manufactures. Combined with illustration or drawing technology, AM can produce customized workpieces with
more complicated shape. However, metal additive manufacturing workpieces has higher surface roughness than conventional forging processes, and excessive surface roughness will affect cell attachment ability. In order to increase biocompatibility, metal additive manufacturing must face the challenge of secondary processing. Therefore, This study adopted electropolishing and anodic titanium oxidation (ATO) to promote osteocytes attachment on the EBM titanium surface, and Cu electroplating to
obtain antibacterial property. The scanning electron microscopy (SEM) images showed the micro/nano-textured structure of surface morphology, increasing the surface Ra from 34.58 μm to 38.86 μm. Antibacterial tests demonstrated that Cu electroplating at the potential of 0.2 V for 6min presented inhibitory property against Escherichia coli and bactericidal property as increasing to8 min. In addition, the above surface-treated EBM titanium revealed improved deposition of hydroxyapatite (Ca/P)layer by in vitro bioactivity test using simulated body fluid.
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