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Related Concept Videos

Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
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For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
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Polyester vs polypropylene, do mesh materials matter? A meta-analysis and systematic review.

Crystal Totten1, Patrice Becker2, Mathilde Lourd2

  • 1Division of General Surgery, Department of Surgery, University of Kentucky, College of Medicine, Lexington, KY 40536-0298, USA.

Medical Devices (Auckland, N.Z.)
|October 2, 2019
PubMed
Summary

Polypropylene (PP) and polyester (PET) mesh show similar outcomes for ventral hernia repair, with no significant differences in recurrence or infection rates. Laparoscopic repair is linked to lower infection rates than open repair, regardless of mesh type.

Keywords:
infectionpolyesterpolypropylenerecurrenceventral hernia

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Area of Science:

  • Surgical Innovation
  • Biomaterials in Surgery
  • Hernia Repair Techniques

Background:

  • Ventral hernia repair outcomes with polypropylene (PP) and polyester (PET) mesh remain debated.
  • Monofilament PP mesh may be preferred over multifilament PET mesh in contaminated fields due to lower extraction rates.

Purpose of the Study:

  • To systematically review and meta-analyze clinical outcomes of ventral hernia repair using PP versus PET mesh.
  • To compare recurrence, infection, and complication rates between PP and PET mesh in ventral hernia repair.

Main Methods:

  • Comprehensive literature search conducted via Ovid platform.
  • Included studies focused on ventral hernia repair with PP or PET mesh, with at least one-year follow-up.
  • Random effects meta-analysis used to pool event rates and confidence intervals for outcomes like recurrence and infection.

Main Results:

  • Analysis of 97 studies involving 10,022 patients.
  • Similar hernia recurrence rates for PET (4.8%) and PP (4.7%) mesh.
  • Similar mesh infection rates for PET (5.0%) and PP (3.5%) mesh.
  • Laparoscopic repair demonstrated significantly lower infection rates (1.6%) compared to open repair (5.2%).

Conclusions:

  • Mesh material (PP vs. PET) does not appear to influence recurrence or infection rates in ventral hernia repair.
  • Both PP and PET mesh are safe options for ventral hernia repair.
  • Laparoscopic ventral hernia repair is associated with reduced infection rates compared to open repair, irrespective of the mesh type used.