Biological determinants of the safety and stability of neuroprosthetic stimulation electrodes. Performance of cochlear implants and the quality of sound perceived by patients is strongly related to electrode impedance. Electrode impedance fluctuates relative to the implant electrical activity, but the mechanisms which cause this are not clear. This project aims to investigate the role of protein adsorption in electrode performance, including impedance and material dissolution. To enable these in ....Biological determinants of the safety and stability of neuroprosthetic stimulation electrodes. Performance of cochlear implants and the quality of sound perceived by patients is strongly related to electrode impedance. Electrode impedance fluctuates relative to the implant electrical activity, but the mechanisms which cause this are not clear. This project aims to investigate the role of protein adsorption in electrode performance, including impedance and material dissolution. To enable these investigations a new biomimetic analogue of the perilymph (cochlea fluid) is intended to be developed. Additionally, the project aims to investigate two strategies to minimise impedance changes: small pulse electrode cleaning and antifouling coatings. Understanding and control of factors influencing electrode stability aim to facilitate next-generation implant designs.Read moreRead less
Hermetic bonding of biomedical polymers for cardiac-assist devices. The use of a polymeric ventricular assist device will bring a much better quality of life to patients with end-stage heart failure. The project will address the remaining challenge, the creation of a hermetic polymer seal, enabling the development of a small, light and highly efficient heart pump. The project has the potential to improve the lives of many Australians as our demographic profile shifts towards older people. Patie ....Hermetic bonding of biomedical polymers for cardiac-assist devices. The use of a polymeric ventricular assist device will bring a much better quality of life to patients with end-stage heart failure. The project will address the remaining challenge, the creation of a hermetic polymer seal, enabling the development of a small, light and highly efficient heart pump. The project has the potential to improve the lives of many Australians as our demographic profile shifts towards older people. Patients with advanced heart failure will live longer, with a higher quality of life. It will assist heart failure sufferers to remain productive members of our community, because many people who use the device will be fit to return to work.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE210100662
Funder
Australian Research Council
Funding Amount
$453,000.00
Summary
Engineering interfaces to enable a new generation of hybrid materials. Hybrid combinations of hydrogel and solid materials allow a high level of functionality for devices such as tissue-engineering scaffolds and soft machines. However, the weak bonding between hydrogels and solids severely hampers their function. This project aims to develop versatile plasma processes that facilitate strong interfaces between hydrogels of choice and solid materials of all kinds. The expected outcome is a green p ....Engineering interfaces to enable a new generation of hybrid materials. Hybrid combinations of hydrogel and solid materials allow a high level of functionality for devices such as tissue-engineering scaffolds and soft machines. However, the weak bonding between hydrogels and solids severely hampers their function. This project aims to develop versatile plasma processes that facilitate strong interfaces between hydrogels of choice and solid materials of all kinds. The expected outcome is a green platform technology for the modular construction of advanced solid-hydrogel hybrids with tailor-made functions; enabling critical advances in the design and synthesis of structured soft matter devices. The project offers significant benefits for Australian high-tech manufacturing industries from health to electronics.Read moreRead less
Biomaterials with multifaceted tunability and bio-specificity. Polyurethanes, a family of polymers with independently tunable mechanical and biodegradation properties, will be developed as a versatile platform material for biomedical implants. Novel energetic ion treatments that allow the coupling of bioactive agents to surfaces will eliminate adverse reactions and enable integration with surrounding tissue.
Development of Cathodic Arc Plasma Immersion Ion Implantation (PIII) for biomaterials applications. Medical prostheses have intricate geometries, consisting of shapes such as screws, holes, wedges, cones and textured surfaces. Plasma Immersion Ion Implantation using metal or carbon ions produced by a cathodic arc has been found to be an excellent process for producing surface modification with the properties required in medical applications, such as low stress and excellent adhesion of very thic ....Development of Cathodic Arc Plasma Immersion Ion Implantation (PIII) for biomaterials applications. Medical prostheses have intricate geometries, consisting of shapes such as screws, holes, wedges, cones and textured surfaces. Plasma Immersion Ion Implantation using metal or carbon ions produced by a cathodic arc has been found to be an excellent process for producing surface modification with the properties required in medical applications, such as low stress and excellent adhesion of very thick coatings. To date this process has only been applied to simple, flat substrates. Extending it to shapes of interest for biomaterials applications will require comprehensive understanding and control of the sheath dynamics, which our combined theoretical and experimental approach will provide.Read moreRead less
Designing functional biomaterials with superior cellular interactions. This proposal aims to make a new class of biomaterials that direct important cellular functions such as adhesion, proliferation, and differentiation. This will be achieved by developing materials that leverage a previously unexplored mechanism that was recently identified in my lab: the co-engagement of integrin and syndecan-4 cell receptors. We will use these biomaterials to 1) fabricate 3D printed tissue engineering scaffo ....Designing functional biomaterials with superior cellular interactions. This proposal aims to make a new class of biomaterials that direct important cellular functions such as adhesion, proliferation, and differentiation. This will be achieved by developing materials that leverage a previously unexplored mechanism that was recently identified in my lab: the co-engagement of integrin and syndecan-4 cell receptors. We will use these biomaterials to 1) fabricate 3D printed tissue engineering scaffolds with a superior ability to promote the development of new tissue, and 2) create surfaces that will enable us to answer fundamental scientific questions regarding cell adhesion and cell/material interactions.Read moreRead less
Plasma processes for optimising the performance of surfaces for biomedical applications. Australia faces a number of pressing problems in health care, including an aging population, environmental damage control and national security, which can be addressed, in part, by effectively interface synthetic materials surfaces with biological systems. Examples of technologies relying on such functional interfaces include implantable medical devices and prostheses, enzymatic conversion of chemicals and w ....Plasma processes for optimising the performance of surfaces for biomedical applications. Australia faces a number of pressing problems in health care, including an aging population, environmental damage control and national security, which can be addressed, in part, by effectively interface synthetic materials surfaces with biological systems. Examples of technologies relying on such functional interfaces include implantable medical devices and prostheses, enzymatic conversion of chemicals and waste, as well as diagnostic arrays and biosensors. The new understanding of fundamental surface properties driving these interactions, together with the new surface modification processes developed in this project, will drive new technologies in these important areas.Read moreRead less
Bioengineered bioscaffolds for Achilles tendinopathy treatment. The purpose of the project is to improve outcomes following the surgical treatment of Achilles tendinopathy. The expected outcome is the development in animals of new ways to design tissue engineered bioscaffolds for the surgical repair of Achilles tendinopathy.
Novel Strategy For The Treatment Of Large Bone Defects Using A Unique Biomaterial With Tailored Microstructure
Funder
National Health and Medical Research Council
Funding Amount
$314,644.00
Summary
There is a rapidly increasing and pressing medical need for the development of synthetic implants that can regenerate large amounts of lost or diseased bone. This project will produce a unique implant with optimal mechanical and biological performance, which represents a viable alternative to bone grafting with broad applications for the repair of large or challenging bone defects. Such an achievement will produce significant healthcare benefits and improved long-term outcomes.
Multiscale Study on Biomechanical Roles of Soft Tissue on Bone Remodelling. The project aims to increase our knowledge of the processes of bone remodelling and the role of soft tissue in this process. Mechanical force is a key stimulus for regulating bone remodelling. A significant question in biomechanics is why orthodontics only use very small forces (1 Newton) to generate significant oral bone remodelling, whereas prosthodontics that apply three orders of magnitude higher forces (~1000 Newton ....Multiscale Study on Biomechanical Roles of Soft Tissue on Bone Remodelling. The project aims to increase our knowledge of the processes of bone remodelling and the role of soft tissue in this process. Mechanical force is a key stimulus for regulating bone remodelling. A significant question in biomechanics is why orthodontics only use very small forces (1 Newton) to generate significant oral bone remodelling, whereas prosthodontics that apply three orders of magnitude higher forces (~1000 Newton) do not move dental implants. This project aims to develop new multiscale modelling and remodelling techniques in computational mechanics to explore the roles played by connective soft tissue in bone adaptation. Expected project outcomes would increase our understanding in biomechanics and affect health care disciplines such as orthodontics, prosthodontics and orthopaedics.Read moreRead less