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Related Experiment Videos

A transverse loading system applied to a modified Harrington instrumentation.

G W Armstrong, S H Connock

    Clinical Orthopaedics and Related Research
    |May 1, 1975
    PubMed
    Summary

    This study introduces a modified Harrington Instrumentation with a transverse loading system to improve spinal deformity correction. This novel approach enhances spinal stability and correction for flexible curves without significant rotation.

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    Spine·1993

    Area of Science:

    • Orthopedic Surgery
    • Spinal Deformity Correction
    • Biomechanical Engineering

    Background:

    • Standard Harrington Instrumentation effectively corrects spinal deformities.
    • Further correction is achievable by applying lateral forces during distraction.
    • Existing methods may have limitations in achieving optimal correction for certain spinal deformities.

    Purpose of the Study:

    • To modify Harrington Instrumentation by incorporating a transverse loading system.
    • To evaluate the efficacy of this modified system in achieving additional correction of spinal deformities.
    • To assess the impact of transverse loading on spinal stability and rotation.

    Main Methods:

    • Modification of standard Harrington Instrumentation to include a transverse loading system.

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  • Application of transverse load near the plane of hook bearing points (below rod axis).
  • Evaluation using photogrammetry to assess spinal rotation post-application.

    • Main Results:

    • The transverse loading system successfully produced additional correction of spinal deformity.
    • This method reduced the distance from the curve apex to the midline, enhancing spinal stability.
    • Photogrammetry confirmed no significant spinal rotation occurred after transverse load application.
    • The system demonstrated success in 10 patients, particularly for flexible curves with minimal kyphosis.

    Conclusions:

    • Modified Harrington Instrumentation with transverse loading offers enhanced correction and stability for spinal deformities.
    • This technique is particularly beneficial for flexible spinal curves with limited kyphosis.
    • The method is safe, showing no significant induced rotation, and has shown promising clinical success.