Comparative study of 1-year clinical and radiological outcomes using robot-assisted pedicle screw fixation and freehand technique in posterior lumbar interbody fusion: A prospective, randomized controlled trial

Ho Joong Kim, Kyoung Tak Kang, Heoung Jae Chun, Ji Sup Hwang, Bong Soon Chang, Choon Ki Lee, Jin S. Yeom

Research output: Contribution to journalArticle

4 Citations (Scopus)


Background: The purpose of this study was to compare the clinical outcome of surgery using robot-assisted posterior interbody fusion with that using freehand posterior interbody fusion in patients with degenerative spinal disease. Methods: 78 participants with degenerative spinal disease were randomly allocated (1:1) to the minimally invasive (MIS), posterior lumbar interbody fusion (Robot-PLIF) or conventional, freehand, open-approach, posterior lumbar interbody fusion (Freehand-PLIF). Results: The baseline-adjusted scores on the Oswestry Disability Index (ODI) in both groups at 1 year after surgery were not different (P = 0.688). However, the decrease in disc height at the proximal adjacent segment was significantly less in the Robot-PLIF group than in the Freehand-PLIF group (P = 0.039). Conclusion: One-year surgical outcomes including Visual Analog Scale, ODI and Short Form-36 did not differ between the two groups. The disc height in the proximal adjacent segment was significantly less decreased in the Robot-PLIF group than in the Freehand-PLIF group.

Original languageEnglish
JournalInternational Journal of Medical Robotics and Computer Assisted Surgery
Publication statusAccepted/In press - 2018 Jan 1
Externally publishedYes



  • Degenerative spinal disease
  • Freehand technique
  • Oswestry Disability Index
  • Robot-assisted pedicle screw fixation

ASJC Scopus subject areas

  • Surgery
  • Biophysics
  • Computer Science Applications

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