Chinese Journal of Tissue Engineering Research ›› 2021, Vol. 25 ›› Issue (30): 4891-4899.doi: 10.12307/2021.279

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Effects and safety of fenestrated and conventional pedicle screw combined with cement-augmentation in osteoporotic vertebral fixation: a meta-analysis

Guo Haiwei1, Xie Jiahao1, Lin Yanping2, Wang Yufeng3, Yang Qingqi4   

  1. 1The Second Affiliated Medical College of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China; 2The Third Affiliated Medical College of Guangzhou University of Chinese Medicine, Guangzhou 510006, Guangdong Province, China; 3Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510120, Guangdong Province, China; 4Guangzhou Medical University, Guangzhou 511436, Guangdong Province, China
  • Received:2021-01-21 Revised:2021-01-23 Accepted:2021-02-18 Online:2021-10-28 Published:2021-07-29
  • Contact: Wang Yufeng, MD, Master’s supervisor, Associate chief physician, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510120, Guangdong Province, China
  • About author:Guo Haiwei, Master candidate, Physician, The Second Affiliated Medical College of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Supported by:
    Research Project for Practice Development of National TCM Clinical Research Bases, No. JDZX2015081 (WYF)

Abstract: OBJECTIVE: Cement-augmentation fenestrated pedicle screws have been widely used in spinal internal fixation surgery combined with osteoporosis in recent years, which can significantly improve the fixation strength and stability, but compared with conventional methods, whether it has more advantages is still inconclusive. To compare the difference in repair effect between the fenestrated and conventional pedicle screw combined with cement-augmentation in osteoporotic vertebrae fixation.
METHODS: Studies compared the fenestrated pedicle screw and the conventional pedicle screw combined with cement-augmentation in osteoporotic vertebrae fixation were retrieved from the electronic database of PubMed, EMbase, Cochrane Library, CNKI, Wanfang and SinoMed. Two reviewers independently extracted the data and assessed the quality of the relevant articles which were screened strictly according to the inclusion and exclusion criteria. The quality evaluation of studies included was carried out according to the Cochrane collaboration’s tool for randomized controlled trials or Newcastle-Ottawa Scale for retrospective cohort studies. Meta-analysis was conducted by using RevMan 5.3 software to compare the clinical efficacy, radiological results and complications of the two methods. 
RESULTS: (1) Totally 12 articles were eventually included into this meta-analysis, involving 6 randomized controlled studies and 6 retrospective cohort studies, totaling 823 patients with 408 cases in the fenestrated pedicle screw group and 415 cases in the conventional pedicle screw group. (2) Meta-analysis results showed there was no statistical significance in operation time, inpatient time, postoperative visual analogue scale score, JOA score, ODI score, Cobb angle, deformation index of vertebrae, and fusion rate between the two groups (P > 0.05). Compared with the conventional pedicle screw group, the fenestrated pedicle screw group had less intraoperative blood loss (MD=-10.66, 95%CI:-18.63 to -2.68, P=0.009), less loss of anterior vertebral height (MD=-0.62, 95%CI:
-0.89 to -0.35), P < 0.000 01) and lower incidence of complications (RR=0.44, 95%CI:0.32-0.60, P < 0.000 01), including bone cement leakage (RR=0.59, 95%CI:0.40-0.88, P=0.009) and screw loosening (RR=0.29, 95%CI:0.13-0.61, P=0.001). 
CONCLUSION: The existing clinical evidence shows that compared with conventional pedicle screw combined with cement-augmentation, the fenestrated pedicle screw combined with cement-augmentation can reduce intraoperative blood loss, maintain vertebral height and significantly reduce the incidence of complications such as bone cement leakage and screw loosening in osteoporotic vertebral fixation.

Key words: pedicle screw, internal fixation, cement-augmentation, bone cement leakage, osteoporosis, screw loosening, complications, meta-analysis

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