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Related Experiment Videos

Relationship between tissue ingrowth and mesh contraction.

Rodrigo Gonzalez1, Kim Fugate, David McClusky

  • 1Department of Surgery, Emory Endosurgery Unit and Hernia Institute, Emory University School of Medicine, 1364 Clifton Road NE, Atlanta, Georgia 30322, USA.

World Journal of Surgery
|June 25, 2005
PubMed
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Polyester (PE) mesh showed less contraction than polypropylene (PP) mesh after implantation in swine. Stronger tissue ingrowth into the mesh correlated with reduced mesh shrinkage, potentially preventing hernia recurrence.

Area of Science:

  • Biomaterials Science
  • Surgical Innovation
  • Tissue Engineering

Background:

  • Mesh contraction is a known complication after surgical implantation, potentially linked to inadequate tissue ingrowth and hernia recurrence.
  • Previous studies suggest varying tissue integration characteristics among different mesh materials.
  • Understanding mesh contraction is crucial for improving hernia repair outcomes.

Purpose of the Study:

  • To compare the tissue ingrowth and contraction of large polyester (PE) and heavyweight polypropylene (PP) meshes in a swine model.
  • To investigate the relationship between tissue ingrowth, mesh size, and mesh contraction.
  • To evaluate the impact of mesh material on post-implantation shrinkage.

Main Methods:

  • Eight PE and eight PP meshes (10x10 cm²) were implanted onto the abdominal fascia of swine.

Related Experiment Videos

  • Mesh contraction was assessed three months post-surgery by measuring remaining mesh area.
  • Tissue ingrowth was quantified using a tensiometer to measure detachment force; histological analysis evaluated inflammatory and fibroblastic responses.

    • Main Results:

    • Polyester (PE) meshes maintained a significantly larger area (87 cm²) compared to polypropylene (PP) meshes (67 cm²) post-implantation (p=0.006).
    • Tissue ingrowth force showed a trend towards being higher for PE meshes (194 N) than PP meshes (159 N), though not statistically significant.
    • A significant positive correlation was found between tissue ingrowth force and the final mesh size (p=0.03), indicating better tissue integration reduces contraction.

    Conclusions:

    • Polyester (PE) mesh demonstrates less contraction compared to polypropylene (PP) mesh following abdominal fascia implantation.
    • Enhanced tissue ingrowth is a key factor in minimizing mesh contraction and shrinkage.
    • These findings suggest that optimizing mesh integration can mitigate mesh contraction, potentially improving long-term hernia repair efficacy.