Equivalent loads from the life-cycle of acetabular cages in relation to bone-graft transformation

卷:236

Article

关键词: TRABECULAR BONE;    DYNAMIC LOADS;    RECONSTRUCTION;    VALIDATION;    SIMULATION;    ADAPTATION;    ALGORITHM;    DENSITY;    MODEL;   

DOI  :  10.1016/j.cmpb.2023.107564

来源: SCIE

【 摘 要 】

Background and Objectives: Bone grafts placed behind acetabular cages change their structure in re-sponse to mechanical stimuli. The full consideration of lifestyle loads is extremely resource-intensive, so a method using substitutive loads was proposed to reduce the calculation cost. The aim of the study is to present and prove this method.Methods: By means of mechanical equations and using the force vectors from the literature which have the same initial point and their relative frequency, while applying a linear model, the average strain energy density distribution for all load cases can be calculated, compiling a matrix from the external loads. From the elements of this matrix, three substitutive load vectors can be calculated, which can be proven to produce the same strain energy density distribution by averaging their effects. The feasibility of using this to model the transformation of bone grafts placed behind acetabular cages is demonstrated with a finite element model, along with a reference calculation.Results: The substitutive load vectors could be calculated in closed form and the simulations showed that they produced a similar density distribution to the reference model with a numerical calculation error range. Accordingly, the density distribution calculated from bone graft transformation is almost the same. Conclusions: In addition to the aforementioned linearity and the same initial point limitations, the ap-plied method is able to produce the substitutive load vectors with which the calculation of the strain energy density distribution and the bone graft's new density distributions can be carried out faster.(c) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

【 授权许可】

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