Evidence map›Paper›PMID 31068193›Full record

ArticleJournal of orthopaedic surgery and research2019

Biomechanical comparison of posterior intermediate screw fixation techniques with hybrid monoaxial and polyaxial pedicle screws in the treatment of thoracolumbar burst fracture: a finite element study.

Huan Liu, Hongwei Wang, Jun Liu, Changqing Li, Yue Zhou, Liangbi Xiang

Open access · goldAbstract readComparative Study
PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of orthopaedic surgery and research, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
1.3field-weighted citation impact, top 20% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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

8 citing papers in PubMed, 1 synthesis or guideline pooled it, 14 citations in OpenAlex.

  1. Posterior-only versus combined anterior-posterior approaches for thoracolumbar burst fractures: a meta-analysis.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Huan LiuDepartment of Orthopedics, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, 646000, China.
Hongwei WangDepartment of Orthopedics, General Hospital of Northern Theater Command of Chinese PLA, Shenyang, 110016, Liaoning, China. cplawhw@163.com.ORCID http://orcid.org/0000-0002-2367-3465
Jun LiuDepartment of Orthopedics, General Hospital of Northern Theater Command of Chinese PLA, Shenyang, 110016, Liaoning, China.
Changqing LiDepartment of Orthopedics, Xinqiao Hospital, The Third Military Medical University, Chongqing, 400037, China.
Yue ZhouDepartment of Orthopedics, Xinqiao Hospital, The Third Military Medical University, Chongqing, 400037, China.
Liangbi XiangDepartment of Orthopedics, General Hospital of Northern Theater Command of Chinese PLA, Shenyang, 110016, Liaoning, China.
Army Medical University · CNGeneral Hospital of Shenyang Military Region · CNShenyang Institute of Automation · CNSouthwest Medical University · CN

Funding

Doctoral Start-up Foundation of Liaoning Province 201601389National Natural Science Foundation of China 11602063the Open Project Program of the State Key Lab of CAD&CG A1718the Open Project Program of the State Key Laboratory of Trauma, Burn and Combined Injury SKLKF201705the State Key Laboratory of Materials Processing and Die & Mould Technology P2018-011the State Key Laboratory of Robotics 2017-O01
6 · The paper itself

Abstract

backgroundTo compare the biomechanical characteristics of different posterior intermediate screw fixation techniques (ISFTs) with hybrid monoaxial pedicle screws (Mps) and polyaxial pedicle screws (Pps) used in thoracolumbar burst fractures.

methodsFixation techniques are compared with regard to the von Mises stress (VMS) of the instrumentations and intradiscal pressures (IDPs) of the adjacent segments by finite element method (FEM).

resultsThe redistributed ROM of the fixation models with Pps fixed at the lowest segment was twice of the other fixation models in flexion and extension. The largest value of maximal VMS of a pedicle screw was located at the lowest pedicle screws when Mps are fixed at the lowest segment. The largest value of maximal VMS of the rods was decreased when more Pps are fixed at the models. Maximal IDPs of the upper adjacent segments were all larger than those of the lower adjacent segments. The maximal IDPs of the fixation model with MPs fixed at the lowest segment were larger than the other fixation models in flexion and extension.

conclusionsPolyaxial pedicle screws could be placed at the upper or the median segment for the facilitated efficient application of the connecting rod. We should focus on the adjacent segmental degeneration especially the upper adjacent segment in the fixation model with Mps fixed at the lowest segment.

Indexed as

Finite Element AnalysisPedicle ScrewsAdultBiomechanical PhenomenaFracture Fixation, InternalHumansImaging, Three-DimensionalLumbar VertebraeMaleSpinal FracturesThoracic VertebraeTreatment OutcomeBiomechanicsHybridMonoaxial pedicle screwPolyaxial pedicle screwThoracolumbar fracture

Identifiers

PMID31068193
PMCPMC6505109
OpenAlexW2947363391

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

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.