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Micro-Mechanical Characterization of Lung Tissue Using Atomic Force Microscopy
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Nondestructive mechanical characterization of developing biological tissues using inflation testing.

P J A Oomen1, M A J van Kelle1, C W J Oomens2

  • 1Department of Biomedical Engineering, Eindhoven University of Technology, 5600MB Eindhoven, Netherlands; Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600MB Eindhoven, Netherlands.

Journal of the Mechanical Behavior of Biomedical Materials
|July 16, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a new, non-destructive method to measure the mechanical properties of biological tissues during tissue culture. This technique helps understand how tissues maintain mechanical homeostasis as they grow and remodel.

Keywords:
Growth and remodelingInverse analysisMechanical characterizationSoft tissuesUltrasound

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Biomechanics

Background:

  • Biological soft tissues exhibit growth and remodeling to maintain mechanical homeostasis.
  • The specific mechanical factors governing this homeostasis are not fully understood.

Purpose of the Study:

  • To develop and validate a non-destructive method for estimating mechanical properties of biological tissues during tissue culture.
  • To enable monitoring of mechanical property evolution during tissue growth and remodeling.

Main Methods:

  • A non-destructive mechanical testing approach using an inflation test within a bioreactor.
  • Ultrasound for non-destructive measurement of tissue displacement and thickness.
  • A two-step inverse finite element analysis for material parameter estimation.

Main Results:

  • The two-step inverse method demonstrated accuracy and efficiency in virtual experiments.
  • Feasibility shown using polydimethylsiloxane (PDMS) samples, yielding results comparable to tensile testing.
  • Successfully applied to estimate material properties of tissue-engineered constructs.

Conclusions:

  • The developed method allows for non-destructive monitoring of mechanical property changes in cultured tissues.
  • This facilitates the identification of key mechanical constituents contributing to tissue homeostasis.
  • Enables better understanding and control of tissue growth and remodeling processes.