bryant roberts supervisors: karen reynolds, egon perilli
TRANSCRIPT
![Page 1: Bryant Roberts Supervisors: Karen Reynolds, Egon Perilli](https://reader036.vdocuments.mx/reader036/viewer/2022081512/56649eb35503460f94bba571/html5/thumbnails/1.jpg)
Developing a method for determining strain in trabecular
bone for validation of an FE model
Bryant RobertsSupervisors: Karen Reynolds, Egon Perilli
![Page 2: Bryant Roberts Supervisors: Karen Reynolds, Egon Perilli](https://reader036.vdocuments.mx/reader036/viewer/2022081512/56649eb35503460f94bba571/html5/thumbnails/2.jpg)
Background- Epidemiology of osteoporosis and fracture fixation
- What are the complications?- Flinders University Research
- How am I going to contribute?
Methods- What is strain mapping? Why is it important?- What has been done previously?- How will I accomplish my task?
Timeline- Develop strain mapping software for N specimens- How will I validate my software
Presentation Outline
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Characterised by low bone mass and micro-architectural deterioration
More common in elderly women
Leading to enhanced bone fragility and a consequent increase in fracture risk
10% ↓ hip bone mass results in 2.5x greater risk of hip fracture (Klotzbuecher et al. 2000)
Osteoporosis
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In Australia- Over 40 admissions to hospital daily- 16,518 incidences in 2006-07
Fracture sites- 96% neck of femur or intertrochanteric
(Dixon & Crisp, 2010)
Osteoporotic Hip Fracture
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Most common surgical procedure- fixation of the fractured bone (metal
plates or screws)
Osteoporotic Hip Fracture
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Low bone density results in inadequate bone-screw interface
This can lend itself to loosening of the fixation device
Implant Complications
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Developing a computer-based model to increase understanding of failure mechanisms during screw insertion into trabecular bone.
Flinders University Research
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FE models calculate strain as function of bone loading, architecture and assumed tissue material properties.
Trabecular bone structure - in order of µm∴ unfeasible to measure strain directly
AimUtilise strain mapping techniques currently reported within the literature.
Validating strain in FE models
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Strain MappingHead Contact
Failure
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Utilise software (ITK, MATLAB) to generate displacement and corresponding strain fields by application of methods defined in the literature.
If required, refine current programs for image registration
Proposal
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Thank youQuestions?