ArticleBiomechanics and modeling in mechanobiology2017
Trabecular deformations during screw pull-out: a micro-CT study of lapine bone.
Article in Biomechanics and modeling in mechanobiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 35 citations in OpenAlex.
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- Digital volume correlation for the characterization of musculoskeletal tissues: Current challenges and future developments.Frontiers in bioengineering and biotechnology · 2022Review
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- Heterogeneous Strain Distribution in the Subchondral Bone of Human Osteoarthritic Femoral Heads, Measured with Digital Volume Correlation.Materials (Basel, Switzerland) · 2020Article
- Measurement of Internal Implantation Strains in Analogue Bone Using DVC.Materials (Basel, Switzerland) · 2020Article
- Bone Damage Evolution Around Integrated Metal Screws Using X-Ray Tomography -Frontiers in bioengineering and biotechnology · 2020Article
- Investigating the Mechanical Characteristics of Bone-Metal Implant Interface UsingFrontiers in bioengineering and biotechnology · 2018Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The mechanical fixation of endosseous implants, such as screws, in trabecular bone is challenging because of the complex porous microstructure. Development of new screw designs to improve fracture fixation, especially in high-porosity osteoporotic bone, requires a profound understanding of how the structural system implant/trabeculae interacts when it is subjected to mechanical load. In this study, pull-out tests of screw implants were performed. Screws were first inserted into the trabecular bone of rabbit femurs and then pulled out from the bone inside a computational tomography scanner. The tests were interrupted at certain load steps to acquire 3D images. The images were then analysed with a digital volume correlation technique to estimate deformation and strain fields inside the bone during the tests. The results indicate that the highest shear strains are concentrated between the inner and outer thread diameter, whereas compressive strains are found at larger distances from the screw. Tensile strains were somewhat smaller. Strain concentrations and the location of trabecular failures provide experimental information that could be used in the development of new screw designs and/or to validate numerical simulations.
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