Computational fluid dynamics simulation from microCT stacks of commercial biomaterials usable for bone grafting

Micron : the International Research and Review Journal for Microscopy
Daniel ChappardBernard Guillaume

Abstract

Granules of calcium/phosphate biomaterials are used to fill small bone defects in oral and maxilla-facial surgery. Granules of natural (e.g., trabecular bone, coral) or synthetic biomaterials are provided by industry. Small granules can also form of putty. The 3D geometry of granules creates a macroporosity allowing invasion of vascular and bone cells when pores are larger than 300 μm. We analyzed the 3D-porosity of 11 different stacks of biomaterials: Osteopure®, CopiOs®, Bio-Oss®, TCP Dental HP®, KeraOs®, TCH®, Biocoral®, EthOss® and Nanostim®. For each granular biomaterial, two sizes of granules were analyzed: small and large. Microcomputed tomography (microCT) determined porosity and microarchitectural characteristics of the biomaterials stacks. Computational fluid dynamics (CFD), a simulation method, was used on the stacks of microCT images. Stacks of small granules had a much lower permeation and fluid velocity than large granules and the hydraulic tortuosity was increased. Significant correlations were observed between microarchitecture parameters (porosity, mean pore diameter and specific surface) and fluid dynamic parameters. The two putties were associated with low (or absence of) porosity and permeation study revealed...Continue Reading

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Citations

Dec 21, 2020·Micron : the International Research and Review Journal for Microscopy·Yuchuan LiuYuxin Zhang
Mar 22, 2021·Morphologie : Bulletin De L'Association Des Anatomistes·L Rony, D Chappard

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