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Enhanced osseointegration of hierarchically structured Ti implant with electrically bioactive SnO2-TiO2 bi-layered surface.

08:00 EDT 21st August 2018 | BioPortfolio

Summary of "Enhanced osseointegration of hierarchically structured Ti implant with electrically bioactive SnO2-TiO2 bi-layered surface."

The poor osseointegration of Ti implant significantly compromise its application in load-bearing bone repair and replacement. Electrically bioactive coating inspirited from heterojunction on Ti implant can benefit osseointegration but cannot avoid the stress shielding effect between bone and implant. To resolve this conflict, hierarchically structured Ti implant with electrically bioactive SnO2-TiO2 bi-layered surface has been developed to enhance osseointegration. Benefiting from the electric cue offered by the built-in electrical field of SnO2-TiO2 heterojunction and the topographic cue provided by the hierarchical surface structure to bone regeneration, the osteoblastic function of basic multicellular units (BMUs) around the implant is significantly improved. Because the individual TiO2 or SnO2 coating with uniform surface exhibits no electrical bioactivity, the effects of electric and topographic cues to osseointegration have been decoupled via the analysis of in vivo performance for the placed Ti implant with different surfaces. The developed Ti implant shows significantly improved osseointegration with excellent bone-implant contact, improved mineralization of extracellular matrix (ECM), and increased push-out force. These results suggest that the synergistic strategy of combing electrical bioactivity with hierarchical surface structure provides a new platform for developing advanced endosseous implants.

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This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
Pages:

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