Evidence map›Paper›PMID 33022166›Full record

ArticleNeurospine2020

The Effect of Rod Pattern, Outrigger, and Multiple Screw-Rod Constructs for Surgical Stabilization of the 3-Column Destabilized Cervical Spine - A Biomechanical Analysis and Introduction of a Novel Technique.

Sebastian Hartmann, Claudius Thomé, Anto Abramovic, Sara Lener, Werner Schmoelz, Juliane Koller, Heiko Koller

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

Article in Neurospine, 2020. 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 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

7 citing papers in PubMed, 10 citations in OpenAlex.

  1. Article
  2. Article
  3. Posterior cervical spinal fusion in the pediatric population using modern adult instrumentation - clinical outcome and safety.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2023
    Article
  4. Article
  5. Article
  6. Article
  7. Article
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 3 institutions in 2 countries.

Sebastian HartmannDepartment of Neurosurgery, Medical University of Innsbruck, Innsbruck, Austria.
Claudius ThoméDepartment of Neurosurgery, Medical University of Innsbruck, Innsbruck, Austria.
Anto AbramovicDepartment of Neurosurgery, Medical University of Innsbruck, Innsbruck, Austria.
Sara LenerDepartment of Neurosurgery, Medical University of Innsbruck, Innsbruck, Austria.
Werner SchmoelzDepartment of Trauma Surgery, Medical University of Innsbruck, Innsbruck, Austria.
Juliane KollerDepartment of Orthopedic Surgery, Schoen Clinic Vogtareuth, Vogtareuth, Germany.
Heiko KollerDepartment of Neurosurgery, Rechts der Isar, Technische Universität München, Germany.
Innsbruck Medical University · ATSchön Klinik Vogtareuth · DETUM Klinikum · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveAnterior-only reconstructions for cervical multilevel corpectomies are prone to fail under continuous mechanical loading. This study sought to define the mechanical characteristics of different constructs in reducing a range of motion (ROM) of the 3-column destabilized cervical spine, including posterior cobalt-chromium (CoCr)-rods, outrigger-rods (OGR), and a novel triple rod construct using lamina screws (6S3R). The clinical implications of biomechanical findings are discussed in depth from the perspective of the challenges surgeons face cervical deformity correction.

methodsThree-column deficient cervical spinal models were produced based on reconstructed computed tomography scans. The corpectomy defect between C3 and C7 end-level vertebrae was restored with anterior titanium (Ti) mesh-cage. The ROM was evaluated in a customized 6-degree of freedom spine tester. Tests were performed with different rod materials (Ti vs. CoCr), varying diameter rods (3.5 mm vs. 4.0 mm), with and without anterior plating, and using different construct patterns: bilateral rod fixation (standard-group), OGR-group, and 6S3R-Group. Construct stability was expressed in changes and differences of ROM (°).

resultsThe largest reduction of ROM was noticed in the 6S3R-group compared to the standard- and the OGR-group. All differences observed were emphasized with an increasing number of corpectomy levels and if anterior plating was not added. For all simulated 1-, 2-, and 3-level corpectomy constructs, the OGR-group revealed decreased ROM for all motion directions compared to the standard-group. An increase of construct stiffness was also recorded for increased rod diameter (4.0 mm) and stiffer rod material (CoCr), though these effects lacked behind the more advanced construct pattern.

conclusionA novel reconstructive technique, the 6S3R-construct, was shown to outperform all other constructs and might resemble a new standard of reference for advanced posterior fixation.

Indexed as

Biomechanical studyCervical spineConstruct testingInstrumentation patternsMultilevel constructsThree-column instability

Identifiers

PMID33022166
PMCPMC7538352
OpenAlexW3088796766

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.