Effects of posterior pedicle screw internal fixation on early Cage subsidence after oblique lateral lumbar interbody fusion

Jie LI; Yilei Chen; Kaifeng Gan; Binhui Chen; Minzhe Zheng; Lingxiao Pan; Junhui Liu; Shuwu Fan; Fengdong Zhao

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Effects of posterior pedicle screw internal fixation on early Cage subsidence after oblique lateral lumbar interbody fusion

VernacularTitle:后路固定对OLIF术后早期融合器沉降的影响
Author: Jie LI ¹ ; Yilei CHEN ^{2
,

3} ; Kaifeng GAN ¹ ; Binhui CHEN ¹ ; Minzhe ZHENG ¹ ; Lingxiao PAN ¹ ; Junhui LIU ^{2
,

3} ; Shuwu FAN ^{2
,

3} ; Fengdong ZHAO ^{2
,

3}
Author Information

1. Department of Orthopedic Surgery, Ningbo Medical Center Li Huili Hospital, Ningbo 315000
2. Department of Orthopedic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine
3. Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province, Hangzhou 310016, China
Publication Type:Journal Article
Keywords: pedicle screw; oblique posterolateral lumbar interbody fusion （OLIF）; Cage subsidence
From: Journal of Xi'an Jiaotong University(Medical Sciences) 2022;43(1):111-116
CountryChina
Language:Chinese
Abstract: 【Objective】 To investigate the effects of one-stage additional posterior pedicle screws （PPS） internal fixation on early Cage subsidence after oblique lateral interbody fusion （OLIF）. 【Methods】 We made a retrospective analysis of 118 patients with lumbar degenerative diseases treated with OLIF at the Department of Orthopedics， Sir Run Run Shaw Hospital， School of Medicine， Zhejiang University， from January 2016 to December 2019. We divided the patients into OLIF stand-alone group （58 ones） and OLIF with PPS fixation group （60 ones） according to the surgical procedure. All the patients had preoperative frontal and lateral radiographs of the lumbar spine， and CT and MR scans were performed. The clinical outcomes and reoperation rates of the two groups were compared at immediate postoperative follow-up and at 1， 3， 6 and 12 months. X-ray and CT examinations were performed to assess Cage subsidence in both groups at each postoperative follow-up. 【Results】 There was no statistical difference between the two groups in baseline data and surgical segmentation. Of the 118 patients with 141 discs who underwent OLIF surgery， 58 patients with 68 discs received OLIF stand-alone surgery and 60 ones with 73 discs received OLIF with PPS fixation. There were no significant differences in intraoperative bleeding， complications， or postoperative clinical outcomes between the two groups （P>0.05）， and the Cage subsidence rate was 22.4% in OLIF stand-alone group and 5% in OLIF with PPS fixation group， with significant difference between the two groups （P<0.01）. 【Conclusion】 Both OLIF stand-alone and OLIF additional PPS fixation can achieve good early clinical outcomes， and first-stage additional PPS fixation can significantly reduce the occurrence of Cage subsidence in the early postoperative period after OLIF.