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Designing and additive manufacturing of talus implant for post-traumatic talus avascular necrosis: a case study
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Designing and additive manufacturing of talus implant for post-traumatic talus avascular necrosis: a case study
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Journal Article
Designing and additive manufacturing of talus implant for post-traumatic talus avascular necrosis: a case study
2024
Overview
New technologies in additive manufacturing and patient-specific CT-based custom implant designs make it possible for previously unimaginable salvage and limb-sparing operations a practical reality. This study presents the design and fabrication of a lattice-structured implant for talus replacement surgery. Our primary case involved a young adult patient who had sustained severe damage to the talus, resulting in avascular necrosis and subsequent bone collapse. This condition caused persistent and debilitating pain, leading the medical team to consider amputation of the left foot at the ankle level as a last resort. Instead, we proposed a Ti6Al4V-based patient-specific implant with lattice structure specifically designed for pan-talar fusion. Finite element simulation is conducted to estimate its performance. To ensure its mechanical integrity, uniaxial compression experiments were conducted. The implant was produced using selective laser melting technology, which allowed for precise and accurate construction of the unique lattice structure. The patient underwent regular monitoring for a period of 24 months. At 2-years follow-up the patient successfully returned to activities without complication. The patient’s functional status was improved, limb shortening was minimized.
Publisher
BioMed Central,BioMed Central Ltd,BMC
