Efficacy and Safety of Oblique Lumbar Interbody Fusion Versus Transforaminal Lumbar Interbody Fusion for Degenerative Lumbar Spondylolisthesis: A Systematic Review and Meta-Analysis

We critically evaluated the efficacy and safety of oblique lumbar interbody fusion (OLIF) versus transforaminal lumbar interbody fusion (TLIF) for degenerative lumbar spondylolisthesis (DLS). PubMed, Embase, Cochrane Library, the Web of Science Core Collection, Chinese Biomedical Literature, China National Knowledge Infrastructure, Wanfang Digital Periodicals, and Chinese Science and Technology Periodicals were searched from their inception to February 2021. Randomized controlled trials and retrospective or prospective cohort studies (CSs) comparing OLIF and TLIF for DLS were included. A meta-analysis was conducted, if possible. Ten studies were included in the statistical analysis. The pooled results of the CSs showed no statistically significant differences ( P > 0.05) in pain relief at 3 or 6 months of follow-up and functional improvement at 1 or 3 months of follow-up in DLS patients between those who had undergone OLIF versus TLIF. The pooled results of the CSs showed that OLIF could significantly improve the degree of lumbar lordosis , foraminal height, and disc height and decrease the intraoperative blood loss, postoperative drainage volume, operative duration, bed rest time, and hospital length of stay ( P < 0.05) compared with TLIF. The incidence of adverse events was not significantly different statistically between OLIF and TLIF. The results from the present study suggest that pain relief and functional improvement were not significantly different between OLIF and TLIF. Nevertheless, the use of OLIF might improve radiological outcomes and reduce intraoperative blood loss, postoperative drainage volume, operative duration, bed rest duration, and hospital length of stay compared with TLIF. Additional high-quality randomized controlled trials are still required to confirm these findings.