Evidence map›Paper›PMID 32521948›Full record

ArticleAsian spine journal2021

Comparative Effectiveness of Laterally Placed Expandable versus Static Interbody Spacers: A 1-Year Follow-Up Radiographic and Clinical Outcomes Study.

Yan Michael Li, Richard Francis Frisch, Zheng Huang, James Edward Towner, Yan Icy Li, Amber Lynn Edsall, Charles Ledonio

Open access · diamondAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Asian spine journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
1.0field-weighted citation impact, top 24% 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

7 citing papers in PubMed, 11 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

7 authors at 5 institutions in 2 countries.

Yan Michael LiDepartment of Neurosurgery and Oncology, Medical Center, School of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Richard Francis FrischSoutheastern Spine Institute, Mt. Pleasant, SC, USA.
Zheng HuangDepartment of Orthopaedics, Guanghua Hospital, Shanghai, China.
James Edward TownerDepartment of Neurosurgery and Oncology, Medical Center, School of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Yan Icy LiDepartment of Neurosurgery and Oncology, Medical Center, School of Medicine and Dentistry, University of Rochester, Rochester, NY, USA.
Amber Lynn EdsallMusculoskeletal Education and Research Center (MERC), A Division of Globus Medical, Inc., Audubon, PA, USA.
Charles LedonioMusculoskeletal Education and Research Center (MERC), A Division of Globus Medical, Inc., Audubon, PA, USA.
University of Rochester Medical Center · USGlobus Medical (United States) · USNational Audubon Society · USShanghai Guanghua Hospital of Integrated Traditional Chinese and Western Medicine · CNSoutheastern Spine Center & Research Institute · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

STUDY

designRetrospective chart review. PURPOSE: This study compared the clinical and radiographic outcomes of patients treated with expandable and static interbody spacers following minimally invasive lateral lumbar interbody fusion (MIS-LLIF) with 12-month follow-up. OVERVIEW OF LITERATURE: A common surgical option for the treatment of degenerative disk disease (DDD) is MIS-LLIF using static or expandable spacers to restore disk height (DH), neuroforaminal height (NH), and segmental lordosis. Static spacers may require excessive trialing and aggressive impaction, potentially leading to endplate disruption and subsidence. Expandable spacers allow for in situ expansion to help address complications associated with static spacers.

methodsThis is an Institutional Review Board-exempt review of 69 patients (static, n=32; expandable, n=37) diagnosed with DDD who underwent MIS-LLIF at 1-2 contiguous level(s) using static or expandable spacers. Radiographic and clinical outcomes were collected and compared at pre- and postoperative time points up to 12 months.

resultsThe expandable group had a significantly higher mean change in Visual Analog Scale (VAS) scores at 6 weeks, 6 months, and 12 months vs. static (∆VAS at 12 months: expandable, 6.7±1.3; static, 5.1±2.6). Mean improvement of Oswestry Disability Index (ODI) scores at 3, 6, and 12 months were significantly better for the expandable group vs. static (∆ODI at 12 months: expandable, 63.2±13.2; static, 29.8±23.4). Mean DH and NH significantly increased at final follow-up for both groups, with no significant difference in DH improvement between groups. The expandable mean NH improvement at 6 weeks and 6 months was significantly greater vs. static. Segmental lordosis significantly improved in the expandable group at all time intervals vs static. Subsidence rate at 12 months was significantly lower in the expandable group (1/46, 2.2%) vs. static (12/37, 32.4%).

conclusionsExpandable spacers resulted in a significantly lower subsidence rate, improve segmental lordosis, and VAS and ODI outcomes at 12 months vs. static.

Indexed as

Lmplants and prosthesesMinimally invasive surgical proceduresSpinal fusions

Identifiers

PMID32521948
PMCPMC7904492
OpenAlexW3033859768

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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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.