Abstract
The dynamic characteristic of bone is its ability to remodel itself through mechanobiological responses. Bone regeneration is triggered by mechanical cues from physiological activities that generate structural strain and cause bone marrow movement. This phenomenon is crucial for bone scaffold when implanted in the cancellous bone as host tissue. Often, the fluid movement of bone scaffold and cancellous bone is studied separately, which does not represent the actual environment once implanted. In the present study, the fluid flow analysis properties of bone scaffold integrated into the cancellous bone at different skeletal sites are investigated. Three types of porous bone scaffolds categorized based on pore size configurations: 1 mm, 0.8 mm and hybrid (0.8 mm interlaced with 0.5 mm) were used. Three different skeletal sites of femoral bone were selected: neck, lateral condyle and medial condyle. Computational fluid dynamics was utilized to analyze the fluid flow properties of bone scaffold integrated cancellous bone. The results of this study reveal that the localization and maximum value of shear stress in an independent bone scaffold are significantly different compared to the bone scaffold integrated with cancellous bone by about 160% to 448% percentage difference. Low shear stress and high permeability were found across models that have higher Tb.Sp (trabecular separation). Specimen C and femoral lateral condyle showed the highest permeability in their respective category.
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Acknowledgements
This work was funded by the Ministry of Higher Education, Malaysia under the Fundamental Research Grant Scheme (FRGS/1/2018/TK03/UTM/02/8). The authors would like to thank the Research Management Centre (RMC), Universiti Teknologi Malaysia (UTM) for managing the project and the Center for Information and Communication Technology (CICT), Universiti Teknologi Malaysia (UTM) for supporting and providing high-performance computing facilities and services.
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Funding is provided by Ministry of Higher Education, Malaysia (Grant No. FRGS/1/2018/TK03/UTM/02/8).
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Noordin, M.A., Kori, M.I., Abdul Wahab, A.H. et al. Fluid Flow Analysis of Integrated Porous Bone Scaffold and Cancellous Bone at Different Skeletal Sites: In Silico Study. Transp Porous Med 145, 271–290 (2022). https://doi.org/10.1007/s11242-022-01849-6
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DOI: https://doi.org/10.1007/s11242-022-01849-6