Mechanical properties of totally permeable titanium composite pylon for direct skeletal attachment
| Autor: | J. Pilling, Mark Pitkin, Grigory Raykhtsaum |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Surface Properties Composite number Biomedical Engineering Shell (structure) chemistry.chemical_element Artificial Limbs Biocompatible Materials Bending Prosthesis Design Bone and Bones Permeability Article Osseointegration Biomaterials Flexural strength Materials Testing Alloys Pressure Animals Humans Pylon Composite material Titanium Insert (composites) Models Statistical technology industry and agriculture Prostheses and Implants equipment and supplies chemistry Bone Substitutes Stress Mechanical Porosity |
| Zdroj: | Journal of Biomedical Materials Research Part B: Applied Biomaterials. :993-999 |
| ISSN: | 1552-4973 |
| DOI: | 10.1002/jbm.b.32663 |
| Popis: | Composite pylons containing a solid titanium core with drilled holes surrounded by a porous sintered titanium shell have been fabricated and tested in bending along with the raw cores and pylons composed of the porous titanium alone. The new pylons were designed with the concept of enhanced in-growth of bone and skin cells and are intended for direct skeletal attachment of limb prostheses considering requirements for long-lasting anchorage to the residuum bone and a need for a safe skin-implant seal. Load-displacement thresholds were determined after which the integrity of the porous component may be compromised. The composite pylons have a flexural strength and stiffness substantially greater than that of pylons composed of the porous titanium alone. The drilled holes in the solid insert have been shown to have virtually no effect on the flexural strength of the pylon, while meeting a requirement for total permeability of the device for unrestricted cell ingrowth. The predicted strength of the pylons and associated failure modes are in close agreement with those measured. |
| Databáze: | OpenAIRE |
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