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Design of a Patient-Specific Knee Osteotomy Plate : a workflow for in-house design of a patient-specific fixation device in malalignment surgery with 3D-technology in patients for whom off the shelf solutions do not fit.

Miessen, L.L. (2023) Design of a Patient-Specific Knee Osteotomy Plate : a workflow for in-house design of a patient-specific fixation device in malalignment surgery with 3D-technology in patients for whom off the shelf solutions do not fit.

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Abstract:Fixation with a generic plate after an osteotomy can be challenging in patients with rare bone deformities. Patients suffer from soft tissue irritation, procedures have longer operation times and mechanical safety may not be assured. This study aimed to develop a workflow for in-house design of a patient-specific plate in malalignment surgery with 3D technology in patients for whom off the shelf solutions do not fit, and to evaluate the mechanical safety and feasibility. Design requirements and a design workflow were based on literature, and measurements in generic plates. Based on a simplified finite element analysis, a first estimation was made of the required thickness of the plates to ensure mechanical safety, varying from 2.9 to 5.9 mm. The virtual validation demonstrated that most of the design requirements were met, except for the 2 mm limit for the plate-bone gap for 1 out of 5 patients. The workflow could be feasible when the benefits outweigh the additional costs. Further research is recommended to conduct a more comprehensive cost-benefit analysis, and to determine the optimal balance between plate-bone fitting and the complexity of the plate shape.
Item Type:Essay (Master)
Clients:
UMC Utrecht, Utrecht, Nederland
Faculty:TNW: Science and Technology
Subject:44 medicine
Programme:Technical Medicine MSc (60033)
Link to this item:https://purl.utwente.nl/essays/97180
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