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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.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
Euler's Formula to Columns with Other End Conditions01:15

Euler's Formula to Columns with Other End Conditions

Euler's formula is very important in the field of structural engineering, providing a foundation for understanding the critical loading conditions of pin-ended columns. This formula links the modulus of elasticity, the moment of inertia of the cross-section, and the column's length, offering a precise calculation of the critical load at which a column is prone to buckling.

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Related Experiment Video

Updated: Jun 17, 2026

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

Suture end length as a function of knot integrity.

Tyler M Muffly1, Christopher Cook, Jennifer Distasio

  • 1Department of Obstetrics and Gynecology, Cleveland Clinic Foundation, 9500 Euclid Avenue,Cleveland, OH 44195, USA. mufflyt@ccf.org

Journal of Surgical Education
|December 17, 2009
PubMed
Summary
This summary is machine-generated.

Suture knot security is crucial. Leaving 0 mm suture ends significantly increases knot untying risk, especially with polyglactin 910 sutures, impacting surgical safety.

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A Training and Testing System for Performing Vascular Reconstruction In Vitro
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Last Updated: Jun 17, 2026

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

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A Training and Testing System for Performing Vascular Reconstruction In Vitro
09:52

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Published on: October 26, 2019

Area of Science:

  • Surgical Materials Science
  • Biomedical Engineering
  • Wound Closure Technology

Background:

  • Suture security is critical for successful wound healing and preventing complications.
  • The impact of suture end length on knot integrity is not fully understood.
  • Commonly used sutures like polyglactin 910, silk, and polydioxanone have varying physical properties.

Purpose of the Study:

  • To determine the tensile forces at failure for three common suture types when suture ends are cut to different lengths.
  • To evaluate the relationship between suture end length and knot security.
  • To compare the failure modes (untying vs. breaking) of different suture materials.

Main Methods:

  • Knots were created using U.S. Pharmacopeia Size 0-0 polyglactin 910, silk, and polydioxanone sutures.
  • Suture ends were randomly cut to lengths of 0 mm, 3 mm, and 10 mm.
  • Knot strength was assessed using a tensiometer, recording failure points (untying or breaking).

Main Results:

  • A total of 178 knots were tested. Shorter suture end lengths (0 mm) significantly increased the likelihood of knots untying (OR = 21.2).
  • Polyglactin 910 sutures exhibited the highest odds of untying (OR = 33.7).
  • Silk sutures failed at significantly lower tensions compared to polydioxanone and polyglactin 910 sutures.

Conclusions:

  • Suture knots with 0 mm end lengths are substantially more prone to untying than those with 3 mm or 10 mm ends.
  • While polyglactin 910 was most likely to untie, its failure tension exceeded the breaking point of silk.
  • Optimizing suture end length is essential for enhancing knot security and surgical outcomes.