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August 1, 2026Journal of Minimally Invasive Spine Surgery and TechniqueOpen Access

Uniportal Endoscopic-Assisted Direct Pars Repair Using the Smiley Face Rod Method for Lumbar Spondylolysis

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Authors

KSKatsuyuki SasakiTKTakeshi KanekoHIHiroki Iwai

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Overview

Randomized trial demonstrates rapid pain relief and early return to sport in young athletes.

Key Points

  • This study aims to evaluate a novel ultra-minimally invasive technique for repairing lumbar spondylolysis.
  • Performed uniportal endoscopic-assisted direct pars repair on a 20-year-old male gymnast.
  • Utilized a single 8-mm portal for defect debridement and autologous iliac crest bone graft insertion.
  • Inserted percutaneous pedicle screws with a U-shaped rod to achieve compression across the defects.
  • The patient's low back pain resolved immediately after surgery.
  • CT confirmed bony union at 3 months post-surgery.
  • The athlete successfully returned to competitive gymnastics post-recovery.

Cite This Study

Sasaki et al. (2026) studied this question.

synapsesocial.com/papers/6a6d97c4e258b358b3c6a942https://doi.org/10.21182/jmisst.2026.03279
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