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Related Concept Videos

Steel Fastening Techniques01:17

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Suture anchor materials, eyelets, and designs: update 2008.

F Alan Barber1, Morley A Herbert, R Cole Beavis

  • 1Plano Orthopedic and Sports Medicine Center, Plano, Texas 75093, USA.

Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association
|July 29, 2008
PubMed
Summary

Newer suture anchors demonstrate significantly improved strength and failure modes compared to older designs. Understanding anchor performance is crucial to prevent intra-articular loose bodies and ensure patient safety.

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Area of Science:

  • Orthopedic biomechanics
  • Biomaterials science
  • Surgical device engineering

Background:

  • Suture anchors are critical for soft tissue reattachment in orthopedic surgery.
  • Evaluating the mechanical properties of novel suture anchors is essential for clinical application.

Purpose of the Study:

  • To assess the single pull load to failure strength and failure modes of recently introduced suture anchors.
  • To compare the biomechanical performance of various suture anchor designs.

Main Methods:

  • Tested suture anchors in porcine bone models (cortical and cancellous).
  • Utilized an Instron machine to apply tensile loads at a controlled rate until failure.
  • Recorded mean failure loads and identified failure modes (pullout, eyelet cutout, suture failure).

Main Results:

  • Significant variation in load to failure strengths among tested anchors.
  • The SwiveLock C anchor exhibited the highest mean failure load (712 N).
  • Pullout and eyelet failure were predominant failure modes for several anchor types.

Conclusions:

  • Modern suture anchors offer substantially enhanced load to failure strengths.
  • Innovations include high-strength sutures, advanced materials (PEEK, Biocryl Rapide), improved eyelet designs, and knotless constructs.
  • Anchors failing by pullout at low loads pose a risk for intra-articular loose body formation.