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Instrumentation Failure After Posterior Vertebral Column Resection in Adult Spinal Deformity.

Hai Wang1, Jianwei Guo, Shengru Wang

  • 1Department of Orthopaedic Surgery, Peking Union Medical College Hospital (PUMCH), Beijing, People's Republic of China.

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Summary
This summary is machine-generated.

Instrumentation failure after posterior vertebral column resection (pVCR) for adult spinal deformity (ASD) is linked to higher BMI, certain comorbidities like achondroplasia, and anterior column defects. Titanium mesh cages (TMCs) are safe but require monitoring for subsidence.

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Area of Science:

  • Spine surgery
  • Orthopedic surgery
  • Adult spinal deformity correction

Background:

  • Posterior vertebral column resection (pVCR) is a complex procedure for adult spinal deformity (ASD).
  • Instrumentation failure is a known complication, yet specific data on pVCR is limited.
  • The safety and efficacy of titanium mesh cages (TMCs) in preventing failure after pVCR require further investigation.

Observation:

  • A retrospective study analyzed 35 adult spinal deformity patients undergoing pVCR.
  • The study assessed the incidence of instrumentation failure, including rod breakage and TMC subsidence.
  • Potential risk factors and outcomes associated with TMC use were evaluated.

Findings:

  • The overall incidence of instrumentation failure was 14.3%, with rod breakage occurring at an average of 6.8 months post-surgery.
  • Risk factors for failure included higher BMI (>27), achondroplasia, and significant anterior column defects (ACD >20 mm).
  • TMC subsidence (≥5 mm) was identified as a specific risk factor in patients receiving TMCs.

Implications:

  • TMCs can be safely used for reconstruction after pVCR in ASD patients.
  • Minimizing anterior column defect height and considering autologous bone grafts or satellite rods for high-risk patients are recommended.
  • Close monitoring for TMC subsidence is crucial, with frequent follow-ups indicated if subsidence reaches ≥5 mm.