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Related Experiment Video

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Digital Planimetry for Assessing Wound Closure Kinetics in a Mouse Model
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A morphoelastic model for dermal wound closure.

L G Bowden1, H M Byrne2, P K Maini2

  • 1Wolfson Centre for Mathematical Biology, Mathematical Institute, University of Oxford, Andrew Wiles Building, Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, UK. bowden@maths.ox.ac.uk.

Biomechanics and Modeling in Mechanobiology
|August 13, 2015
PubMed
Summary
This summary is machine-generated.

This study models skin wound healing using finite elasticity, revealing how residual stress, tissue growth, and contraction drive the healing process and long-term remodeling. The model simulates healing phases and predicts outcomes for rewounding and pressure treatments.

Keywords:
ContractionDermisFinite elasticityVolumetric growthWound healing

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Area of Science:

  • Biomechanics
  • Dermal tissue mechanics
  • Wound healing modeling

Background:

  • Skin wound healing involves complex mechanical processes including residual stress, growth, and contraction.
  • Finite elasticity provides a framework to model large deformations and stresses in biological tissues.

Purpose of the Study:

  • To develop a computational model for skin wound healing based on finite elasticity.
  • To investigate the roles of residual stress, mechanosensitive growth, and contraction in dermal wound closure.
  • To simulate and predict the effects of rewounding and pressure treatments on wound healing.

Main Methods:

  • Modeling dermal tissue as a hyperelastic cylinder undergoing symmetric deformations.
  • Incorporating an evolution law for mechanosensitive growth based on residual tension.
  • Defining a phenomenological law for wound contraction driven by radial pressure.
  • Analyzing the distinct phases of wound healing: recoil, active healing, and remodeling.

Main Results:

  • The model accurately reproduces the three observed phases of wound healing: initial recoil, contraction/growth-driven healing, and eventual slowing.
  • Residual stress in the skin significantly influences initial wound recoil.
  • The model predicts a steady-state growth profile for remodeled tissue.
  • Simulations demonstrate the model's capability to predict outcomes of rewounding experiments and pressure applications.

Conclusions:

  • Finite elasticity offers a robust framework for understanding the mechanical regulation of wound healing.
  • Residual stress and mechanosensitive growth are critical factors in dermal wound closure and remodeling.
  • The developed model serves as a valuable tool for predicting healing outcomes and evaluating therapeutic interventions.