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[Postoperative, appositional ossifications after lumbar laminectomy].

A W Baltzer1, R Krämer, M M el-Sharkawi

  • 1Orthopädische Klinik, Heinrich-Heine-Universität Düsseldorf.

Zentralblatt Fur Chirurgie
|December 28, 1999
PubMed
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Post-laminectomy appositional ossification is common. Simultaneous lumbar fusion with laminectomy reduces ossification, suggesting fusion should be considered for spinal stenosis surgery.

Area of Science:

  • Spinal surgery
  • Orthopedic research
  • Radiographic analysis

Background:

  • Post-laminectomy complications like hypermobility and ossification impact long-term outcomes.
  • Understanding factors influencing post-laminectomy ossification is crucial for improving surgical results.

Purpose of the Study:

  • To investigate the relationship between segmental instability and appositional ossification after laminectomy.
  • To identify factors influencing the degree of new bone formation following lumbar laminectomy.

Main Methods:

  • Radiographic evaluation of 55 patients post-laminectomy for lumbar spinal stenosis.
  • Assessment of appositional ossification and segmental instability (translation, angulation).
  • Correlation analysis with simultaneous fusion, number of segments, age, and sex.

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Main Results:

  • Appositional ossification was observed in 94% of patients post-laminectomy.
  • Simultaneous fusion significantly reduced appositional ossification compared to laminectomy alone.
  • Segmental instability, number of segments, age, and sex did not correlate with ossification extent.

Conclusions:

  • Postoperative appositional ossification is a frequent finding after laminectomy.
  • Lumbar fusion correlates with reduced ossification, but instability does not.
  • Consideration of simultaneous lumbar fusion is recommended in spinal stenosis surgery planning.