A novel bone substitute with high bioactivity, strength, and porosity for repairing large and load-bearing bone defects
Li JJ, Dunstan C, Entezari A, Li Q, Steck R, Saifzadeh S, Sadeghpour A, Field JR, Akey A, Vielreicher M, Friedrich O, Esfahani SI, Zreiqat H (2019)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2019
Journal
Article Number: e1801298
Abstract
Achieving adequate healing in large or load-bearing bone defects is highly challenging even with surgical intervention. The clinical standard of repairing bone defects using autografts or allografts has many drawbacks. A bioactive ceramic scaffold, strontium-hardystonite-gahnite or "Sr-HT-Gahnite" (a multi-component, calcium silicate-based ceramic) is developed, which when 3D-printed combines high strength with outstanding bone regeneration ability. In this study, the performance of purely synthetic, 3D-printed Sr-HT-Gahnite scaffolds is assessed in repairing large and load-bearing bone defects. The scaffolds are implanted into critical-sized segmental defects in sheep tibia for 3 and 12 months, with bone autografts used for comparison. The scaffolds induce substantial bone formation and defect bridging after 12 months, as indicated by X-ray, micro-computed tomography, and histological and biomechanical analyses. Detailed analysis of the bone-scaffold interface using focused ion beam scanning electron microscopy and multiphoton microscopy shows scaffold degradation and maturation of the newly formed bone. In silico modeling of strain energy distribution in the scaffolds reveal the importance of surgical fixation and mechanical loading on long-term bone regeneration. The clinical application of 3D-printed Sr-HT-Gahnite scaffolds as a synthetic bone substitute can potentially improve the repair of challenging bone defects and overcome the limitations of bone graft transplantation.
Authors with CRIS profile
Martin Vielreicher
Lehrstuhl für Medizinische Biotechnologie (MBT)
Oliver Friedrich
Lehrstuhl für Medizinische Biotechnologie (MBT)
Related research project(s)
Involved external institutions
University of New South Wales (UNSW)
Australia (AU)
University of Sydney (USYD)
Australia (AU)
Harvard University
United States (USA) (US)
Queensland University of Technology (QUT)
Australia (AU)
University of Adelaide
Australia (AU)
Australia (AU)
University of Sydney (USYD)
Australia (AU)
Harvard University
United States (USA) (US)
Queensland University of Technology (QUT)
Australia (AU)
University of Adelaide
Australia (AU)
How to cite
APA:
Li, J.J., Dunstan, C., Entezari, A., Li, Q., Steck, R., Saifzadeh, S.,... Zreiqat, H. (2019). A novel bone substitute with high bioactivity, strength, and porosity for repairing large and load-bearing bone defects. Advanced Healthcare Materials. https://doi.org/10.1002/adhm.201801298
MLA:
Li, Jiao Jiao, et al. "A novel bone substitute with high bioactivity, strength, and porosity for repairing large and load-bearing bone defects." Advanced Healthcare Materials (2019).
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