Can we safely deform a plate to fit every bone? Population-based fit assessment and finite element deformation of a distal tibial plate

Harith, Hazreen, Schmutz, Beat, Malekani, Javad, Schuetz, Michael A., & Yarlagadda, Prasad K. (2016) Can we safely deform a plate to fit every bone? Population-based fit assessment and finite element deformation of a distal tibial plate. Medical Engineering and Physics, 38(3), pp. 280-285.

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Anatomically precontoured plates are commonly used to treat periarticular fractures. A well-fitting plate can be used as a tool for anatomical reduction of the fractured bone. Recent studies highlighted that some plates fit poorly for many patients due to considerable shape variations between bones of the same anatomical site. While it is impossible to design one shape that fits all, it is also burdensome for the manufacturers and hospitals to produce, store and manage multiple plate shapes without the certainty of utilization by a patient population.

In this study, we investigated the number of shapes required for maximum fit within a given dataset, and if they could be obtained by manually deforming the original plate. A distal medial tibial plate was automatically positioned on 45 individual tibiae, and the optimal deformation was determined iteratively using finite element analysis simulation. Within the studied dataset, we found that: (i) 89% fit could be achieved with four shapes, (ii) 100% fit was impossible through mechanical deformation, and (iii) the deformations required to obtain the four plate shapes were safe for the stainless steel plate for further clinical use. The proposed framework is easily transferable to other orthopaedic plates.

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ID Code: 91578
Item Type: Journal Article
Refereed: Yes
Keywords: Tibia, Implant, Fracture, Bending, Deformation, 3D, Fit assessment, FEA
DOI: 10.1016/j.medengphy.2015.11.012
ISSN: 1350-4533
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 IPEM
Deposited On: 05 Jan 2016 00:22
Last Modified: 30 May 2016 02:52

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