Evidence map›Paper›PMID 30472820›Full record

ArticleAsian spine journal2019

Stand-Alone Cervical Cages in 2-Level Anterior Interbody Fusion in Cervical Spondylotic Myelopathy: Results from a Minimum 2-Year Follow-up.

Eugene Pak-Lin Ng, Andrew Siu-Leung Yip, Keith Hay-Man Wan, Michael Siu-Hei Tse, Kam-Kwong Wong, Tik-Koon Kwok, Wing-Cheung Wong

Open access · diamondAbstract read
In one paragraph

Article in Asian spine journal, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 23% 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, 1 synthesis or guideline pooled it, 12 citations in OpenAlex.

  1. Factors influencing cage subsidence in anterior cervical corpectomy and discectomy: a systematic review.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 · 2023
    Pooled it
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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

7 authors at 1 institution in 1 country.

Eugene Pak-Lin NgDepartment of Orthopaedics and Traumatology, Kwong Wah Hospital, Hong Kong.
Andrew Siu-Leung YipDepartment of Orthopaedics and Traumatology, Kwong Wah Hospital, Hong Kong.
Keith Hay-Man WanDepartment of Orthopaedics and Traumatology, Kwong Wah Hospital, Hong Kong.
Michael Siu-Hei TseDepartment of Orthopaedics and Traumatology, Kwong Wah Hospital, Hong Kong.
Kam-Kwong WongDepartment of Orthopaedics and Traumatology, Kwong Wah Hospital, Hong Kong.
Tik-Koon KwokDepartment of Orthopaedics and Traumatology, Kwong Wah Hospital, Hong Kong.
Wing-Cheung WongDepartment of Orthopaedics and Traumatology, Kwong Wah Hospital, Hong Kong.
Kwong Wah Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

STUDY

designA retrospective review of patients who underwent 2-level anterior cervical discectomy and fusion (ACDF) with standalone polyetheretherketone (PEEK) cages for cervical spondylotic myelopathy (CSM). PURPOSE: To evaluate the efficacy of stand-alone PEEK cage in 2-level cervical interbody fusion for CSM. OVERVIEW OF LITERATURE: ACDF is a standard surgical procedure to treat degenerative disc disease. However, the use of additional anterior plating for 2-level ACDF remains controversial.

methodsWe reviewed outcomes of patients who underwent 2-level ACDF with stand-alone PEEK cages for CSM over a 7-year period (2007-2015) in a regional hospital. Japanese Orthopaedic Association (JOA) score, fusion rate, subsidence rate, cage migration, and cervical alignment by the C2-7 angle as well as the local segmental angle (LSA) of the cervical spine were assessed.

resultsIn total, 31 patients (mean age, 59 years; range, 36-87 years) underwent 2-level ACDF with a cage-only construct procedure between 2007 and 2015. The minimum follow-up was 24 months; mean follow-up was 51 months. C3-5 fusion was performed in 45%, C4-6 fusion in 32%, and C5-7 fusion in 23%. Mean JOA score improved from 10.1±2.2 to 13.9±2.1 (p<0.01) at the 24-month follow-up. Fusion was achieved in all patients. Subsidence occurred in 22.5% of the cages but was not associated with differences in JOA scores, age, sex, or levels fused. Lordosis of the C2-7 angle and LSA increased after surgery, which were maintained for up to 1 year but subsequently disappeared after 2 years, yet the difference was not statistically significant. No cage migration was noted; two patients developed adjacent segment disease requiring posterior laminoplasty 3 years after ACDF.

conclusionsThe use of a stand-alone PEEK cage in a 2-level cervical interbody fusion achieves satisfactory improvements in both clinical outcomes and fusion.

Indexed as

Anterior cervical discectomy and fusionCervical spondylotic myelopathyStand-alone cageTwo level fusion

Identifiers

PMID30472820
PMCPMC6454285
OpenAlexW2902312378

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

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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.