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|Title: ||Investigation of 3DP technology for fabrication of surgical simulation phantoms|
|Authors: ||Gatto, Matteo|
|Issue Date: ||2011|
|Publisher: ||© M. Gatto|
|Abstract: ||The demand for affordable and realistic phantoms for training, in
particular for functional endoscopic sinus surgery (FESS), has continuously
increased in recent years. Conventional training methods, such as current
physical models, virtual simulators and cadavers may have restrictions,
including fidelity, accessibility, cost and ethics.
In this investigation, the potential of three-dimensional printing for the
manufacture of biologically representative simulation materials for surgery
training phantoms has been investigated. A characterisation of sinus anatomical
elements was performed through CT and micro-CT scanning of a cadaveric
sinus portion. In particular, the relevant constituent tissues of each sinus region
have been determined. Secondly, feedback force values experienced during
surgical cutting have been quantified with an actual surgical instrument,
specifically modified for this purpose. Force values from multiple post-mortem
subjects and different areas of the paranasal sinuses have been gathered and
used as a benchmark for the optimisation of 3D-printing materials.
The research has explored the wide range of properties achievable in
3DP through post-processing methods and variation of printing parameters. For
this latter element, a machine-vision system has been developed to monitor the
3DP in real time. The combination of different infiltrants allowed the
reproduction of force values comparable to those registered from cadaveric
human tissue. The internal characteristics of 3D printed samples were shown to
influence their fracture behaviour under resection. Realistic appearance under
endoscopic conditions has also been confirmed.
The utilisation of some of the research has also been demonstrated in
another medical (non-surgical) training application.
This investigation highlights a number of capabilities, and also limitations,
of 3DP for the manufacturing of representative materials for application in
surgical training phantoms.|
|Description: ||A Doctoral Thesis. Submitted in partial fulfillment of the requirements for the award of Doctor of Philosophy of Loughborough University.|
|Appears in Collections:||PhD Theses (Mechanical, Electrical and Manufacturing Engineering)|
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