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Surgical navigation technology for placement of patient-specific osseointegration implants and locking screws in patients with short femoral stumps

Smits, E.P.J. (2018) Surgical navigation technology for placement of patient-specific osseointegration implants and locking screws in patients with short femoral stumps.

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Abstract:Patients with lower limb amputation often experience discomfort from their prosthetic leg. A suitable alternative to a socket prosthesis is an osseointegrated prosthesis. To ensure implant stability, it is supported with a locking screw placed through the top of the implant into the femoral head. Intraoperatively, 2D fluoroscopy is used. The surgeon needs to determine the correct drilling position on the cortex of the femur to place the locking screw, which is time-consuming and leads to considerable radiation doses. The main goal of this thesis is to develop a prototype of optical navigation software for placement of femoral implants and locking screws. The software is built in Unity, using an optical tracking camera. Different visualizations are designed and feedback is provided by changing the colour of virtual objects. A preclinical test with 18 users is conducted to determine which visualization guides the user most efficiently. No significant differences between visualizations were found. Secondly, a proof of concept for guided excavation of the femur is performed. SNT is able to provide a real-time 3D visualization and give feedback on reaching the planned position. More research is needed to quantify how much the radiation dose and surgical time could be decreased.
Item Type:Essay (Master)
Clients:
Radboudumc, Nijmegen, The Netherlands
Faculty:TNW: Science and Technology
Subject:44 medicine
Programme:Technical Medicine MSc (60033)
Link to this item:http://purl.utwente.nl/essays/76969
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