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Related Experiment Videos

Bone cement improves suture anchor fixation.

Nicholas J Giori1, David H Sohn, Faisal M Mirza

  • 1Rehabilitation Research and Development Center, VA Palo Alto Health Care System, Palo Alto, CA, USA. ngiori@stanford.edu

Clinical Orthopaedics and Related Research
|May 17, 2006
PubMed
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Augmenting suture anchors with polymethylmethacrylate cement significantly improves fixation strength. This technique enhances anchor stability in bone, reducing pull-out failure risk in both new and stripped anchor holes.

Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Biomechanics

Background:

  • Suture anchor fixation failure is a risk in orthopedic procedures.
  • Anchor pull-out from bone can compromise surgical outcomes.
  • Novel methods to enhance suture anchor stability are needed.

Purpose of the Study:

  • To evaluate the efficacy of polymethylmethacrylate (PMMA) cement in augmenting suture anchor fixation.
  • To determine if PMMA can improve fixation in stripped anchor holes.
  • To compare the mechanical performance of augmented versus non-augmented anchors.

Main Methods:

  • Six matched cadaveric proximal humeri were used for biomechanical testing.
  • Suture anchors were tested with and without PMMA augmentation.

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  • Cyclic loading to failure was performed on all specimens.
  • PMMA was applied to unstripped holes before anchor placement and to stripped holes after initial failure.

    • Main Results:

    • PMMA augmentation increased cycles to failure by 34% and failure load by 71% in unstripped anchors.
    • PMMA augmentation of stripped anchors increased cycles to failure by 31% and failure load by 111% compared to unstripped, uncemented anchors.
    • No significant difference in fixation strength was observed between cemented stripped and cemented unstripped anchors.

    Conclusions:

    • Polymethylmethacrylate cement effectively augments suture anchor fixation in the proximal humerus.
    • PMMA improves fixation strength, reducing pull-out failure risk.
    • This technique is beneficial for both intact and stripped anchor holes, enhancing overall implant stability.