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Interspinous process segmental spinal instrumentation.

D Drummond, J Guadagni, J S Keene

    Journal of Pediatric Orthopedics
    |August 1, 1984
    PubMed
    Summary
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    Interspinous segmental spinal instrumentation (ISSI) using a novel button-wire implant enhances spinous process fixation strength. This spinal instrumentation method shows promising results in laboratory tests and early clinical applications for scoliosis.

    Area of Science:

    • Spinal Surgery
    • Orthopedic Biomechanics
    • Medical Device Engineering

    Background:

    • Spinal instrumentation is crucial for treating spinal deformities and instability.
    • Existing methods for spinous process fixation have limitations in strength and stress distribution.
    • The need for robust and reliable interspinous fixation techniques is well-established.

    Purpose of the Study:

    • To describe a novel interspinous segmental spinal instrumentation (ISSI) technique.
    • To report laboratory testing results evaluating the biomechanical properties of the ISSI implant.
    • To present early clinical outcomes of ISSI in various spinal applications.

    Main Methods:

    • A button-wire implant design for ISSI is detailed.
    • Laboratory tension tests were conducted to assess pullout strength and stress-relieving capabilities.

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  • Biomechanical testing on a scoliosis simulator evaluated the instrumented spine's resistance to failure under compressive loads.

    • Main Results:

    • The ISSI button-wire implant demonstrated a 47% improvement in pullout strength compared to simple wire fixation.
    • The interspinous instrumented spine exhibited favorable resistance to high compressive loads in simulator tests.
    • Early clinical use across diverse indications yielded encouraging outcomes.

    Conclusions:

    • ISSI with the button-wire implant offers enhanced fixation strength and stress relief.
    • The technique provides robust biomechanical support, comparable to other spinal systems.
    • ISSI is a preferred surgical option for idiopathic and congenital scoliosis based on early clinical data.