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Mirror electropolished titanium implants support bone integration and bone reconstruction

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Document pages: 10 pages

Abstract: This work describes the ultrastructural composition of the interface tissue adjacent to electropolished and commercial pure titanium implants, including and excluding subsequent anodization. It also studies whether a smooth electropolished surface can support bone formation in a manner similar to a surface with a fairly thick surface oxide layer. The spiral implants were electropolished to remove all topographic residues in the processing process and form a thin spontaneously formed surface oxide layer and smooth surface. Half of the implants were subsequently anodized to form a thickened surface oxide layer and increased surface roughness. Although there are significant differences in surface physicochemical properties, microstructure and chemical compositionthe newly formed bone were similar for both implant surfaces after 12 weeks of healing in rabbit tibia. A close spatial relationship was observed between osteocyte canaliculi and both implant surfaces. On the ultrastructural level, the merely electropolished surface showed the various stages of bone formation, for example, matrix deposition and mineralisation, entrapment of osteoblasts within the mineralised matrix, and their morphological transformation into osteocytes. The results demonstrate that titanium implants with a mirror-like surface and a thin, spontaneously formed oxide layer are able to support bone formation and remodelling.

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