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Braces do not reduce loads on internal spinal fixation devices.

A Rohlmann1, G Bergmann, F Graichen

  • 1Orthopaedic Hospital of the Free University of Berlin, Germany.

Clinical Biomechanics (Bristol, Avon)
|January 5, 2000
PubMed
Summary
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Spinal braces and harnesses did not reduce internal fixation device loads in patients. In fact, wearing a brace or harness sometimes increased implant loads, suggesting limited benefit after lumbar spine stabilization.

Area of Science:

  • Spinal biomechanics
  • Orthopedic implant technology
  • Spinal fusion outcomes

Background:

  • Limited data exists on the efficacy of braces or harnesses in reducing spinal implant loads.
  • Understanding external support effects is crucial for optimizing post-operative care and implant longevity.

Purpose of the Study:

  • To evaluate the impact of specific braces and harnesses on the loads experienced by internal spinal fixation devices.
  • To investigate whether external supports can alleviate stress on spinal implants.

Main Methods:

  • In vivo measurement of implant loads using telemeterized internal spinal fixators in six patients.
  • Assessment of loads during various activities (sitting, standing, walking, bending, leg lifting) with and without a Boston overlap brace, reclination brace, or lumbotrain harness.

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Main Results:

  • No significant load reduction was observed on the spinal fixation devices with any of the tested braces or harnesses.
  • In several instances, wearing a brace or harness led to an increase in fixator loads.
  • The tested external supports did not demonstrate a beneficial effect on implant load management.

Conclusions:

  • Bracing or harnessing appears unhelpful for patients undergoing mono- or bisegmental stabilization of the lumbar spine.
  • The findings suggest that external supports may not provide the intended load-reducing benefits for these specific spinal procedures.