Design and manufacturing by fused filament technique of novel YSZ porous grafts infiltrated with PCL/PVA/AgNPs for large bone defects repairing
The repair of large bone segmental defects continues to be one of the greatest challenges in orthopaedic surgery and traumatology. Replicating the designs and the hierarchical distribution of bone porosity, as well as guaranteeing the biomechanical and biofunctional requirements of bone tissues, is...
| Authors: | , , , , , , , , , |
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| Format: | article |
| Publication Date: | 2024 |
| Country: | España |
| Institution: | Universidad de Castilla-La Mancha |
| Repository: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/35922 |
| Online Access: | https://doi.org/10.1016/j.jmrt.2024.02.057 https://hdl.handle.net/10578/35922 |
| Access Level: | Open access |
| Keyword: | Electro-Fenton Electrolysis Hexachlorocyclohexanes Hydrogen peroxide Radicals |
| Summary: | The repair of large bone segmental defects continues to be one of the greatest challenges in orthopaedic surgery and traumatology. Replicating the designs and the hierarchical distribution of bone porosity, as well as guaranteeing the biomechanical and biofunctional requirements of bone tissues, is still necessary. This calls for the study of advanced manufacturing techniques, whose early stage limites the availability of commercial scaffolds in a wide spectrum of materials, including zirconia, In this work, filaments suitable for FFF are prepared with up to 50% biomedical grade zircona stabilized with 3% yttria nano powders, which is a remarkable breakthrough in the processing of this material. Novel graft designs for a better fixation to the damaged bone are proposed and successfully manufactured by FFF with such filaments, opening up the opportunity to avoid external plate fixations. To reduce the risk of infection, the grafts were infiltrated with PCL/PVA/AgNPs composite with different ratios of polymers (80:20, 50:50) assessed to synchronize their biodegradability to prophylactic behaviour and potential bone ingrowth. The biodegradation capacity of biopolymers in PBS and their role in the mechanical behaviour of grafts have been assessed, demonstrating the beneficial potential of the multicomponent graft proposed reaching strength values of 90-105 MPa. |
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