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A Novel Coated Suture Displays Antimicrobial Activity Without Compromising Structural Properties.

Umer Daood1, Muhammad Sharjeel Ilyas2, Mariam Ashraf3

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Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons
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New quaternary ammonium silane (QAS) coatings on surgical sutures provide significant antibacterial properties. These antimicrobial sutures maintain structural integrity and mechanical strength, showing promise for wound infection prevention.

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Area of Science:

  • Biomaterials Science
  • Surgical Innovation
  • Antimicrobial Technology

Background:

  • Sutures are crucial for wound closure.
  • Preventing suture contamination is vital for reducing surgical site infections.
  • Antimicrobial coatings offer a promising strategy to enhance suture safety.

Purpose of the Study:

  • To coat surgical sutures with a novel quaternary ammonium silane (QAS) antimicrobial compound.
  • To evaluate the impact of two application temperatures on suture properties.
  • To assess structural, physical, mechanical, and biological characteristics of QAS-coated sutures.

Main Methods:

  • Sutures were coated with QAS (0.5% and 1.0% wt/vol) via dip coating.
  • Coated and uncoated sutures were tested at 25°C and 40°C.
  • Evaluated structural (FTIR), dimensional (SEM), mechanical (tensile strength), and biological (bacterial viability, macrophage polarization) properties.

Main Results:

  • FTIR confirmed QAS presence; 1% QAS at 40°C increased diameter and weight.
  • 0.5% QAS-coated sutures exhibited superior antibacterial activity and mechanical strength.
  • QAS coating significantly modulated macrophage M1/M2 polarization markers (IL-6, IL-10, CD80+, CD163+).

Conclusions:

  • QAS coating effectively imparts antibacterial properties to surgical sutures.
  • The antimicrobial coating does not compromise essential physical and mechanical suture characteristics.
  • QAS-coated sutures represent a potential advancement in preventing wound contamination and infections.