University of Twente Student Theses


The development of a digital design workflow for the surgical obturator

Ubbink, J.T. (2019) The development of a digital design workflow for the surgical obturator.

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Abstract:The design of the current surgical obturator is not based on 3d delineation of the tumour and associated resection margins in CT and/or MR. This results in limited prior insight into the shape and extend of the defect that will be created during the maxillectomy procedure and prevents the presurgical production of a hollow surgical obturator. The surgical obturator is based on the intraoperative combination of a premade baseplate, which covers the defect, and a putty bulb, which fills the defect. The putty bulb is heavy which results in reduced patient comfort. A digital workflow for obturator design aims to improve the obturator production time, reduce surgical time and increase patient comfort. A digital surgical baseplate was successfully planned, printed and evaluated parallel to the traditional design workflow. Evaluation of the relation between the traditional obturator bulb surface and the remaining bony skull segments shows that an undersized hollow obturator bulb leave a distance of four millimetres to the nearest bone segment. This study shows that digital design can aid obturator design and production. However, it also shows the need for the introduction of digital delineation in the presurgical planning stage and illustrates the need for verification of results during and after surgery.
Item Type:Essay (Master)
Faculty:TNW: Science and Technology
Subject:44 medicine
Programme:Technical Medicine MSc (60033)
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