Evidence map›Paper›PMID 34615516›Full record

ArticleBMC musculoskeletal disorders2021

Effects of different pedicle screw insertion depths on sagittal balance of lumbar degenerative spondylolisthesis, a retrospective comparative study.

Quan Zhou, Jun-Xin Zhang, Yi-Fei Zheng, Yun Teng, Hui-Lin Yang, Hao Liu, Tao Liu

Abstract read
In one paragraph

Article in BMC musculoskeletal disorders, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
  4. Risk factors for pedicle screw loosening: a comprehensive review.Journal of orthopaedic surgery and research · 2025
    Review
  5. Review
  6. Article
  7. Radiographic and surgery-related predictive factors for increased segmental lumbar lordosis following lumbar fusion surgery in patients with degenerative lumbar spondylolisthesis.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2024
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

7 authors.

Quan Zhou *Department of Orthopaedics, The First Affiliated Hospital of Soochow University, 899 Pinghai Road, Suzhou, 215006, China.
Jun-Xin Zhang *Department of Orthopaedics, The First Affiliated Hospital of Soochow University, 899 Pinghai Road, Suzhou, 215006, China.
Yi-Fei Zheng *The Affiliated Suzhou Science & Technology Town Hospital of Nanjing Medical University, No. 1, Lijiang Road, Suzhou, 215006, Jiangsu, China.
Yun TengDepartment of Orthopaedics, The First Affiliated Hospital of Soochow University, 899 Pinghai Road, Suzhou, 215006, China.
Hui-Lin YangDepartment of Orthopaedics, The First Affiliated Hospital of Soochow University, 899 Pinghai Road, Suzhou, 215006, China.
Hao LiuDepartment of Orthopaedics, The First Affiliated Hospital of Soochow University, 899 Pinghai Road, Suzhou, 215006, China. liuhaodoctor@163.com.
Tao LiuDepartment of Orthopaedics, The First Affiliated Hospital of Soochow University, 899 Pinghai Road, Suzhou, 215006, China. liutao821108@163.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFew reports to date have evaluated the effects of different pedicle screw insertion depths on sagittal balance and prognosis after posterior lumbar interbody and fusion (PLIF) in patients with lumbar degenerative spondylolisthesis (LDS).

methodsA total of 88 patients with single-level PLIF for LDS from January 2018 to December 2019 were enrolled. Long screw group (Group L): 52 patients underwent long pedicle screw fixation (the leading edge of the screw exceeded 80% of the anteroposterior diameter of vertebral body). Short screw group (Group S): 36 patients underwent short pedicle screw fixation (the leading edge of the screw was less than 60% of the anteroposterior diameter of vertebral body). Local deformity parameters of spondylolisthesis including slip degree (SD) and segment lordosis (SL), spino-pelvic sagittal plane parameters including pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS) and lumbar lordosis (LL), Oswestry Disability Index (ODI), and Visual Analog Scale (VAS) for back pain of both groups were compared. Postoperative complications, including vertebral fusion rate and screw loosening rate, were recorded.

resultsExcept that PI in Group S at the final follow-up was not statistically different from the preoperative value (P > 0.05), other parameters were significantly improved compared with preoperative values one month after surgery and at the final follow-up (P < 0.05). There was no significant difference in parameters between Group L and Group S before and one month after surgery (P > 0.05). At the final follow-up, SD, SL, LL, PT and PI-LL differed significantly between the two groups (P < 0.05). Compared with the preoperative results, ODI and VAS in both groups decreased significantly one month after surgery and at the final follow-up (P < 0.05). Significant differences of ODI and VAS were found between the two groups at the final follow-up (P < 0.05). Postoperative complications were not statistically significant between the two groups (P > 0.05).

conclusionsPLIF can significantly improve the prognosis of patients with LDS. In terms of outcomes with an average follow-up time of 2 years, the deeper the screw depth is within the safe range, the better the spino-pelvic sagittal balance may be restored and the better the quality of life may be.

Indexed as

Pedicle ScrewsSpondylolisthesisHumansQuality of LifeRetrospective StudiesDegenerative disease of the spineInsertion depthLumbar spondylolisthesisPosterior lumbar interbody and fusionSagittal balanceSpino-pelvic parameters

Identifiers

PMID34615516
PMCPMC8493756

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.