Topology-optimized patient-specific osteosynthesis plates
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Authors
Author (Corporation)
Publication date
02.09.2022
Typ of student thesis
Course of study
Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
Current Directions in Biomedical Engineering
Special issue
DOI of the original publication
Link
Series
Series number
Volume
8
Issue / Number
2
Pages / Duration
177-180
Patent number
Publisher / Publishing institution
De Gruyter
Place of publication / Event location
De Gruyter
Edition
Version
Programming language
Assignee
Practice partner / Client
Abstract
Patient-specific osteosynthesis plates can be used to reduce complications related to bone fracture treatment, such as infection, malocclusion and fatigue fractures of plates and screws. However, the implant design process is tedious. We propose a semi-automatic workflow to computationally design patient-specific titanium osteosynthesis plates for mandibular angle fractures. In this process, the plate stiffness is maximized while the mass is reduced. Two plate designs with different numbers of screw holes (implant #1 with four holes, implant #2 with eight holes) were generated with identical topology optimization settings and compared in a finite element model simulating various biomechanical masticatory loads. Differences in von Mises stresses in the implants and screws were observed. The load case of clenching the jaw on the opposite side of the fracture showed the highest stress distribution in implant #1 and higher peak stresses in implant #2. Stress concentrations were observed in sharp corners of the implant and could be reduced using local stress-based topology optimization. We conclude that the design process is an effective method to generate patientspecific implants.
Keywords
Implant design, Omputational modeling, Computational design, Finite element analysis, Topology optimization, 3D printing, Additive manufacturing
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ISBN
ISSN
2364-5504
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Gold
License
Citation
Maintz, M., Seiler, D., Thieringer, F. M., & de Wild, M. (2022). Topology-optimized patient-specific osteosynthesis plates. Current Directions in Biomedical Engineering, 8(2), 177–180. https://doi.org/10.1515/cdbme-2022-1046