Evidence map›Paper›PMID 31179643›Full record

ArticleOrthopaedic surgery2019

Technical Note: Pedicle Cement Augmentation with Proximal Screw Toggle and Loosening.

Wen Jie Choy, William R Walsh, Kevin Phan, Ralph J Mobbs

Open access · goldAbstract readCase Reports
In one paragraph

Article in Orthopaedic surgery, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.5field-weighted citation impact, top 18% 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

11 citing papers in PubMed, 14 citations in OpenAlex.

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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

4 authors at 1 institution in 1 country.

Wen Jie ChoyNeuroSpine Surgery Research Group (NSURG), Sydney, New South Wales, Australia.ORCID https://orcid.org/0000-0001-8929-8170
William R WalshSurgical & Orthopaedic Research Laboratory, Prince of Wales Clinical School, University of New South Wales, Sydney, Randwick, New South Wales, Australia.
Kevin PhanNeuroSpine Surgery Research Group (NSURG), Sydney, New South Wales, Australia.ORCID https://orcid.org/0000-0002-5940-3555
Ralph J MobbsNeuroSpine Surgery Research Group (NSURG), Sydney, New South Wales, Australia.
UNSW Sydney · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCement augmentation is a technique used to increase the stability and purchase of pedicle screws in poor quality bone. Various methods can be applied for cement delivery, such as cement injection before screw placement and the use of fenestrated screws. However, potential problems can arise with the use of cement augmentation. CASE PRESENTATION: A 66-year-old man with a lower trunk deformity, severe kyphosis, and sagittal imbalance following fusion (L

conclusionSingle-level cement augmentation of pedicle screw in a posterior construct and distal tip cement augmentation of the screw results in a fixed pivot point. Micromotion in cranio-caudal loading during flexion and extension may result in screw toggling with the single-level cement-augmented tip as a fulcrum. This may cause screw loosening, which can lead to pullout and loss of construct stability. The halo around the screw suggests bone loss and/or a fibrous tissue interface, which further complicates revision surgery. Stress shielding and polymethylmethacrylate cement present additional difficulties. The findings of this technical note question the risks and benefits of cement-augmented fenestrated pedicle screw fixation for spinal fusion. Although incidences of such cases are uncommon, surgeons should perform this technique with caution. Accurate restoration of lumbar lordosis during index procedures is important to minimize the risk of construct failure.

Indexed as

Bone CementsPedicle ScrewsAgedHumansMaleProsthesis FailureSpinal FusionBone CementsCement augmentationFenestrated pedicle screwsLumbar spinePeri-screw haloScrew looseningScrew toggling

Identifiers

PMID31179643
PMCPMC6595100
OpenAlexW2949115405

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.