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Related Concept Videos

Sutures of the Skull01:22

Sutures of the Skull

The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
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Elastin is Responsible for Tissue Elasticity

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Related Experiment Video

Updated: Jun 4, 2026

A Novel Arthroscopic Medial Knot-Tying Suture-Bridge Repair with Rip-Stop Technique for Rotator Cuff Tears
06:41

A Novel Arthroscopic Medial Knot-Tying Suture-Bridge Repair with Rip-Stop Technique for Rotator Cuff Tears

Published on: January 13, 2026

Knot integrity as a function of suture expiration.

Tyler M Muffly1, Pilar Baquero, Aaron J Bonham

  • 1Center of Urogynecology and Reconstructive Pelvic Surgery, Obstetrics, Gynecology and Women's Health Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA.

Journal of Surgical Education
|February 5, 2011
PubMed
Summary

Expired sutures, particularly chromic and polydioxanone, showed reduced tensile strength compared to non-expired materials. However, overall knot integrity remained largely unaffected in laboratory testing, with no sutures untying.

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Using Q Suture to Enhance Resistance to Gap Formation and Tensile Strength of Repaired Flexor Tendons
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Published on: June 3, 2020

Related Experiment Videos

Last Updated: Jun 4, 2026

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A Novel Tenorrhaphy Suture Technique with Tissue Engineered Collagen Graft to Repair Large Tendon Defects

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Using Q Suture to Enhance Resistance to Gap Formation and Tensile Strength of Repaired Flexor Tendons
10:32

Using Q Suture to Enhance Resistance to Gap Formation and Tensile Strength of Repaired Flexor Tendons

Published on: June 3, 2020

Area of Science:

  • Surgical Materials Science
  • Biomaterials Engineering
  • Wound Closure Technology

Background:

  • Suture material expiration dates are critical for ensuring surgical safety and efficacy.
  • Degradation of suture materials over time can potentially compromise their mechanical properties.
  • Understanding the impact of prolonged expiration on suture integrity is essential for clinical practice.

Purpose of the Study:

  • To evaluate the tensile strength of expired versus non-expired suture materials.
  • To compare the knot integrity of various suture types after exceeding their expiration dates.
  • To determine if prolonged expiration significantly affects the mechanical performance of surgical sutures.

Main Methods:

  • Knots were tied using five different suture materials (chromic catgut, polyglactin 910, polydioxanone, silk, coated polyester), both expired (mean 10.5 years past date) and non-expired.
  • Sutures were soaked and tested for tensile strength using a tensiometer until breakage or untying.
  • A minimum of 30 knots per group was required for statistical significance.

Main Results:

  • Overall, no significant difference in mean tensile strength was found between expired (77.5 ± 31.7 N) and non-expired sutures (81.9 ± 30.2 N).
  • Expired chromic catgut and polydioxanone sutures demonstrated significantly lower tensile strength compared to their non-expired counterparts (p=0.002 and p=0.001).
  • All tested sutures broke at the knot, and none untied, regardless of expiration status.

Conclusions:

  • Expired chromic catgut and polydioxanone sutures exhibit reduced tensile strength under laboratory conditions.
  • While specific materials show degradation, overall knot integrity and failure mode (breaking at knot) were consistent between expired and non-expired sutures.
  • These findings suggest careful consideration of specific suture material types when using expired products.