3D Printed Biodegradable Esophageal Stent
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Ημερομηνία
2024-06-18
Συγγραφείς
Profitiliotis, Thomas
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This dissertation was written as part of the Msc in Strategic Product Design at
the International Hellenic University.
Esophageal stenting is used in the palliative therapy of dysphagia to patients
suffering from esophageal diseases. Nonetheless, the currently available metallic and
plastic stents aren’t patient specific and come with different complications, such as
perforation and migration to the stomach. To reduce these complications, I designed a
biodegradable esophageal stent with different lattice structures. The designed stents
were 3D printed using varioshore TPU. Tensile strength, nanoindentation, selfexpansion
and anti-migration tests were conducted to ensure that both the material
and the designs meet the required specifications. Tensile strength testing revealed that
printing the material at a lower temperature produced a stronger and more ductile
material. Similarly, nanoindentation testing revealed that printing the material at a
lower temperature produced a more stiff and deformable material. Although the selfexpansion
test revealed that the lattice structure of the stents had no influence on
compressibility or recovery, the printing temperature did, with stents printed at higher
temperatures being less resistive to compression. The anti-migration test findings
showed that increasing the printing temperature can affect the stent's expansion
within the esophagus and that the design of the lattice structures can improve the
stent's resistance to migration. The results suggest that the 3D printed esophageal
stent with lattice structures has the potential to be used in the treatment of
esophageal diseases.
Περιγραφή
Λέξεις-κλειδιά
Esophageal diseases, 3D printed stent, Varioshore TPU, Lattice structures