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Background & Aim: The purpose of this study was to evaluate and compare the pain of patients with spondylolisthesis who had undergone either of the surgery techniques: posterolateral fusion (PLF) or posterior lumbar interbody fusion (PLIF). Methods & Materials/Patients: In a prospective observational study, 102 surgical candidates with low grade degenerative and isthmic spondylolisthesis were enrolled from 2012 to 2014. The observed patients were into two groups: PLF and PLIF. Assessing of pain has been done by a questionnaire using Visual Analogue Scale (VAS) scores. The questionnaire was completed by all patients before surgery, the day after surgery, after six months and after one year. Results: There were no statistically significant differences in terms of age and sex distribution, type of spondylolisthesis and pre-operation pain between groups (p>0.05). Comparison of the mean VAS scores of two groups over the whole study period showed a significant statistical difference (p-value 0.05), but the difference of mean VAS scores between groups 6 months after surgery was statistically significant (p<0.05). Analyzing the course of VAS scores over the study period showed a descending pattern for either of the groups (p<0.0001). Conclusion: Both surgical fusion techniques (PLF & PLIF) showed to be effective in treating low grade degenerative and isthmic spondylolisthesis, but PLIF was related to better outcome with respect to pain control.

Curb the Pain of Spondylolisthesis; Comparing Posterolateral Fusion with Posterior Lumbar Interbody Fusion