Fabrication of Rigid Polyurethane Foam Lumbar Spine Model for Surgical Training using Indirect Additive Manufacturing
Lumbar model is an artificial bone that is commonly used in surgical training to simulate working with the human-like bone for the trainer. The common lumbar model is made of rigid polyurethane (PU) foam and is produced using casting. However, the current lumbar model is expensive and has limita...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Indonesia
2022-12-01
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| Series: | International Journal of Technology |
| Subjects: | |
| Online Access: | https://ijtech.eng.ui.ac.id/article/view/6125 |
| Summary: | Lumbar model is an artificial bone that is commonly used in
surgical training to simulate working with the human-like bone for the trainer.
The common lumbar model is made of rigid polyurethane (PU) foam and is produced
using casting. However, the current lumbar model is expensive and has
limitations in representing the real human lumbar, especially in geometry,
visuals, and haptics. Therefore, an alternative method of fabricating lumbar
models made of rigid polyurethane for surgical training using indirect additive
manufacturing will be investigated in this paper. The proposed indirect
additive manufacturing is a combination of 3D printing and casting methods. The
main process of this method is started by fabricating a mold made of polyvinyl
alcohol (PVA) using fused deposition modeling (FDM) 3D printing and
subsequently casting PU foam material into the 3D printed PVA mold.
Accordingly, the aim of this study is to find the optimized casting process
parameters, especially for injecting the material into the mold, to achieve a
better quality of lumbar model. The study was conducted using a Design of
Experiment (DoE) Taguchi Orthogonal Array to optimize the casting process. The
geometrical measurements of middle end-plate depth, upper end-plate width,
spinal canal width, spinal canal depth, and lower pedicle length show the error
ranged from 0.14% to 0.85%. The average porosity, measured from the body,
lamina, and spinous, was found to be non-uniform. It is ranged from 19.58% to
21.94% on the middle part and 39.78% to 45.41% on the subsurface of lumbar
model. The density was increased by 64.89% compared to the reference open
molded PU foam. |
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| ISSN: | 2086-9614 2087-2100 |