In response to the College of Sydney, researchers have efficiently developed a brand new printing method that may mimic nanosized buildings present in pure bone. The strategy makes it attainable to imitate bone anatomy in unprecedented element, with researchers in a position to exactly management the grain measurement and the way porous it may be throughout printing.
The event was co-led by Professor Hala Zreiqat, the Payne-Scott Professor of Biomedical Engineering on the College of Sydney, and Affiliate Professor Iman Roohani, now on the College of Know-how Sydney’s Faculty of Biomedical Engineering.
“The expertise brings us a step nearer to reworking bone graft surgical procedures sooner or later,” mentioned Professor Zreiqat, who was lately appointed as a 2025 Fellow of the American Institute for Medical and Organic Engineering for her work in musculoskeletal regeneration and profitable expertise commercialization.
The fabric used intently mimics the mineral composition of pure bone, permitting human cells to recognise and work together with it successfully, to create artificial bone with the identical energy and organic properties of pure bone.
“This reduces the danger of long-term problems and future surgical procedures and gives a extra pure restoration of bone defects,” mentioned Professor Zreiqat, whose crew specialises in creating bio-ceramic supplies that intention to recreate the construction and properties of actual bone. “Whereas the expertise remains to be evolving, it represents a big step in reconstructive surgical procedure.”
In 2023, based on the Australian Orthopaedic Affiliation Nationwide Joint Substitute Registry, there have been 58,529 hip alternative surgical procedures, 78,125 knee alternative surgical procedures, and 10,141 shoulder alternative surgical procedures. An Australian Institute of Well being and Welfare statistics report confirmed that, in 2021-22, there have been 53,500 knee replacements (210 per 100,000 inhabitants) and 35,500 hip replacements (140 per 100,000 inhabitants) to deal with osteoarthritis.
The expertise makes use of specialised inks from biocompatible supplies, akin to calcium phosphate, which intently resemble the mineral composition of pure bone. The crew was in a position to print at 300 nanometres decision, which they are saying is one thousand instances stronger than current methods.
Though human bone seems to be deceptively easy on the floor, inside the bone mineral is a fancy structure of micro- and nano-sized shapes and kinds. This provides bones their energy, sturdiness, and skill to help the burden of a number of layers of dense human muscle and tissue.
“Bone’s advanced structure is a masterpiece of nature,” mentioned Professor Zreiqat, based mostly on the Faculty of Biomedical Engineering within the School of Engineering. “Our bioceramic scaffolds intention to imitate the construction and properties of actual bone. Simply wanting like bone just isn’t sufficient – it wanted to have related energy and integrity. We had been in a position to do it on the macro and micro degree, however reaching it on the nano degree was the ultimate piece of the puzzle.”
Affiliate Professor Roohani and PhD candidate Shuning Wang cracked the code by utilizing prenucleation clusters. Naturally discovered within the bone, these clusters play an vital function in bone formation by guiding the mineralisation course of that strengthens bone. By incorporating these clusters right into a extremely clear and printable calcium phosphate resin, the researchers have been in a position to mimic the micro- and nano-scale options of pure bone.
The strategy not solely displays a deep understanding of the bone’s organic processes but additionally showcases the potential of utilizing supplies impressed by biology to revolutionise medical therapies. The findings had been printed in Superior Supplies. The 3D printing machine used to print bone substitutes is positioned at Analysis and Prototype Foundry, a Core Analysis Facility on the College of Sydney.
“This examine demonstrates the potential to create bone-mimicking buildings, paving the way in which for superior bone grafts and implants,” mentioned lead writer Affiliate Professor Roohani, who accomplished the work on the College of Sydney as a part of Professor Zreiqat’s crew and now leads the Superior Biomaterials and Fabrication laboratory at UTS. “This might revolutionise bioceramic implants, regenerative medication and high-performance biomaterials.”
Historically, metallic implants akin to titanium plates and screws are used. Though they supply structural help, they don’t take part within the therapeutic course of. There’s additionally the danger of the physique rejecting the international object or an infection. The aim of bioceramic supplies developed by Professor Zreiqat’s crew is to offer help but additionally to regularly combine with the physique and encourage new bone formation.
One of many crew members, Ms Shuning Wang, mentioned the examine is a serious leap towards creating bone implants that really mimic pure bone, right down to the nanoscale. “Subsequent, we’re advancing this expertise by enhancing the scalability of our printed buildings, accelerating their path to scientific software,” she mentioned.
