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Dragonfly wing technology to defend against post-surgery infection

Health

Cell biology researchers are partnering with nanotechnology experts in South Australia to fight post-surgery infection by creating implants based on dragonfly wings.

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Working with leading surgeons and an Australian orthopaedic medical device company, researchers from the University of Adelaide and University of South Australia will use nano-modification technology to reduce the chance of infection after orthopaedic surgery.

The bacteria-busting qualities of the dragonfly were first identified by Australian researchers who observed bacteria being killed on the insects’ wings, characterised by tiny spikes – nanopillars – which are about one thousandth of the thickness of a human hair.

The researchers are carrying out a range of groundbreaking experiments to test whether mimicking the nano-patterns of the dragonfly wing on orthopaedic implants can kill harmful bacteria that cause infections.

The four-year, A$20 million project, co-funded by Global Orthopaedic Technology and the Innovative Manufacturing Cooperative Research Centre (IMCRC), could give scientists and clinicians a critical breakthrough in the global fight against antibiotic resistant bacteria. It is also intended to create new technologies and processes to benefit the wider manufacturing sector.

Professor Richard de Steiger, a leading Australian orthopaedic surgeon involved in clinical research, said implant infection post-surgery was a billion dollar problem worldwide, affecting 2 to 3 per cent of medical implants, including devices to stabilise fractures, hip and knee replacements and spinal implants.

“There has been minimal improvement in orthopaedic infection rates for the past 15 years. Infection after surgery is a devastating problem, costing not only hundreds of millions of dollars in additional surgery worldwide, but leading to more trauma for patients. They may need extra recovery time after further operations, which are not always successful and pose an even greater risk of infection,” he said.

Leading scientists from the two Adelaide-based institutions will combine their expertise to create titanium implants with the dragonfly wing surface while confirming their safety and testing their bacteria-killing properties in the University of Adelaide’s Centre for Orthopaedic and Trauma Research (COTR) and UniSA’s Musculoskeletal Biotest Facility.

COTR Scientific Director Professor Gerald Atkins said the research aimed to develop “game-changing Australian technology”.

“This research is a combination of cell biology and very clever nanomanufacturing techniques, driven by an unmet medical need,” he said.

UniSA Professor Krasimir Vasilev said the technology had the potential to improve the quality of life of millions of patients around the world.

“The project is also a great example of transdisciplinary collaboration between scientists, clinicians and industry, transforming healthcare, manufacturing industry and the Australian economy,” he said.

IMCRC’s CEO and Managing Director David Chuter said the project would re-shape other sectors beyond the medical device industry.

“Due to the nature of the nano surface, which is independent of the chemistry and material properties of the substrate to which it is applied, the technology can potentially be used in other manufacturing processes across multiple industries, most notably the hospital supplies and equipment industry, the food industry, the marine industry, the building products industry, and the aeronautical industry.

“The new technology will open many doors, not just in the medical field, as antibacterial surfaces are also valuable in the food industry, for example – in fact, for any surfaces subject to high levels of bacteria.”

Global Orthopaedic Technology and IMCRC are each providing a $3 million cash investment as part of a total medical and manufacturing R&D investment of $20 million, with the additional funding provided through in-kind contributions from Global Orthopaedic Technology and both universities.

This is a Creative Commons story from The Lead South Australia, a news service providing stories about innovation in South Australia. Please feel free to use the story in any form of media. The story sources are linked in with the copy and all contacts are willing to talk further about the story.

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