Computer assisted evaluation of plate osteosynthesis of diaphyseal femur fracture considering interfragmentary movement: a finite element study
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Claudia Wittkowske
, Stefan Raith
Abstract
A semi-automated workflow for evaluation of diaphyseal fracture treatment of the femur has been developed and implemented. The aim was to investigate the influence of locking compression plating with diverse fracture-specific screw configurations on interfragmentary movements (IFMs) with the use of finite element (FE) analysis. Computed tomography (CT) data of a 22-year-old non-osteoporotic female were used for patient specific modeling of the inhomogeneous material properties of bone. Hounsfield units (HU) were exported and assigned to elements of a FE mesh and converted to mechanical properties such as the Young’s modulus followed by a linear FE analysis performed in a semi-automated fashion. IFM on the near and far cortex was evaluated. A positive correlation between bridging length and IFM was observed. Optimal healing conditions with IFMs between 0.5 mm and 1 mm were found in a constellation with a medium bridging length of 80 mm with three unoccupied screw holes around the fracture gap. Usage of monocortical screws instead of bicortical ones had negligible influence on the evaluated parameters when modeling non-osteoporotic bone. Minimal user input, automation of the procedure and an efficient computation time ensured quick delivery of results which will be essential in a future clinical application.
Acknowledgments
The authors thank Prof. Dr. Oliver Lieleg for his valuable comments as well as Jalil Jalalil, Michael Schimmelpfennig and Alexander Nolte for providing assistance through different stages of the project. We would also like to thank the manufacturer DePuy Synthes for providing the CAD data of the locking compression plate. We also thank Prof. Stoeckle and Prof. Rummeny for their support and providing the infrastructure for this work. This work was supported by the Central Innovation Program SME (Zentrales Innovationsprogramm Mittelstand – ZIM) by the German Ministry for Economic Affairs (grant number: KF2061602AK2).
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©2017 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Review
- Bone plates for osteosynthesis – a systematic review of test methods and parameters for biomechanical testing
- Research articles
- Computer assisted evaluation of plate osteosynthesis of diaphyseal femur fracture considering interfragmentary movement: a finite element study
- Larger screw diameter may not guarantee greater pullout strength for headless screws – a biomechanical study
- Design considerations for patient-specific surgical templates for total hip arthroplasty with respect to acetabular cartilage
- Migration measurement of the cemented Lubinus SP II hip stem – a 10-year follow-up using radiostereometric analysis
- Shear stress and von Mises stress distributions in the periphery of an embedded acetabular cup implant during impingement
- Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention
- Extraordinary biological properties of a new calcium hydroxyapatite/poly(lactide-co-glycolide)-based scaffold confirmed by in vivo investigation
- Feasibility study of using a Microsoft Kinect for virtual coaching of wheelchair transfer techniques
- Accuracy of leg alignment measurements from antero-posterior radiographs
- Holoentropy enabled-decision tree for automatic classification of diabetic retinopathy using retinal fundus images
- Pattern recognition of enrichment levels of SELEX-based candidate aptamers for human C-reactive protein
- Source localization of S-cone and L/M-cone driven signals using silent substitution flash stimulation
Articles in the same Issue
- Frontmatter
- Review
- Bone plates for osteosynthesis – a systematic review of test methods and parameters for biomechanical testing
- Research articles
- Computer assisted evaluation of plate osteosynthesis of diaphyseal femur fracture considering interfragmentary movement: a finite element study
- Larger screw diameter may not guarantee greater pullout strength for headless screws – a biomechanical study
- Design considerations for patient-specific surgical templates for total hip arthroplasty with respect to acetabular cartilage
- Migration measurement of the cemented Lubinus SP II hip stem – a 10-year follow-up using radiostereometric analysis
- Shear stress and von Mises stress distributions in the periphery of an embedded acetabular cup implant during impingement
- Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention
- Extraordinary biological properties of a new calcium hydroxyapatite/poly(lactide-co-glycolide)-based scaffold confirmed by in vivo investigation
- Feasibility study of using a Microsoft Kinect for virtual coaching of wheelchair transfer techniques
- Accuracy of leg alignment measurements from antero-posterior radiographs
- Holoentropy enabled-decision tree for automatic classification of diabetic retinopathy using retinal fundus images
- Pattern recognition of enrichment levels of SELEX-based candidate aptamers for human C-reactive protein
- Source localization of S-cone and L/M-cone driven signals using silent substitution flash stimulation