University of Twente Student Theses


Towards the automatic Computer Aided Design & Manufacturing (CAD/CAM) workflow for Orbital Prosthesis

Bakker, J.P.J. (2023) Towards the automatic Computer Aided Design & Manufacturing (CAD/CAM) workflow for Orbital Prosthesis.

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Abstract:Facial morphology resemblance dramatically improves Quality of Life. The orbital prosthesis (OP) workflow is labour-intensive, time-consuming, while significantly impacted by the anaplastologist’ skill level. Especially regarding Patient-Specific Ocular implant (PSOI) alignment. Using data gathered by different 3D scan techniques, an accuracy and reproducibility assessment of anatomical- (AL) versus simulated landmarks (SL) was performed and validated. A comprehensive workflow was established for designing and printing a Wax Fitting Model (WFM). The WFM’s were analysed on plaster facial models No significance was found regarding the use of AL versus SL. Although a slight advantage for SL was noted. Manually selection of SL proved more reproducible than the AL. Analysis of the WFM showed a wide variety in fitting and PSOI alignment. This research explored implementation possibilities of Computer Aided Design- & Manufacturing (CAD/CAM) principles in OP workflow’s, and provided a 3D designing and printing workflow for WFM’s. PSOI alignment did not met the expectancies and no clear advantage for SL was found. The WFM provided decent calculated PSOI position integration, posterior access, and the potential as a preliminary model for manufacturing OPs. Future research should focus on bony landmark alignment from CT segmentations and implementation of Statistical Shape Modelling.
Item Type:Essay (Master)
NKI-AVL, Amsterdam, The Netherlands
Faculty:TNW: Science and Technology
Subject:44 medicine
Programme:Technical Medicine MSc (60033)
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