Microcomputed tomography and microfinite element modeling for evaluating polymer scaffolds architecture and their mechanical properties

Angel Alberich-Bayarri, David Moratal, Jorge L. Escobar Ivirico, José C. Rodríguez Hernández, Ana Vallés-Lluch, Luis Martí-Bonmatí, Jorge Más Estellés, Joao F. Mano, Manuel Monleón Pradas, José L. Gómez Ribelles, Manuel Salmerón-Sánchez

研究成果: ジャーナルへの寄稿学術誌査読

29 被引用数 (Scopus)

抄録

Detailed knowledge of the porous architecture of synthetic scaffolds for tissue engineering, their mechanical properties, and their interrelationship was obtained in a nondestructive manner. Image analysis of microcomputed tomography (μCT) sections of different scaffolds was done. The three-dimensional (3D) reconstruction of the scaffold allows one to quantify scaffold porosity, including pore size, pore distribution, and struts' thickness. The porous morphology and porosity as calculated from μCT by image analysis agrees with that obtained experimentally by scanning electron microscopy and physically measured porosity, respectively. Furthermore, the mechanical properties of the scaffold were evaluated by making use of finite element modeling (FEM) in which the compression stress-strain test is simulated on the 3D structure reconstructed from the μCT sections. Elastic modulus as calculated from FEM is in agreement with those obtained from the stress-strain experimental test. The method was applied on qualitatively different porous structures (interconnected channels and spheres) with different chemical compositions (that lead to different elastic modulus of the base material) suitable for tissue regeneration. The elastic properties of the constructs are explained on the basis of the FEM model that supports the main mechanical conclusion of the experimental results: the elastic modulus does not depend on the geometric characteristics of the pore (pore size, interconnection throat size) but only on the total porosity of the scaffold.

本文言語英語
ページ(範囲)191-202
ページ数12
ジャーナルJournal of Biomedical Materials Research - Part B Applied Biomaterials
91
1
DOI
出版ステータス出版済み - 10月 1 2009
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 生体材料
  • 生体医工学

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