Evidence map›Paper›PMID 25103951›Full record

ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2014

Posterior-only correction of Scheuermann kyphosis using pedicle screws: economical optimization through screw density reduction.

Eyal Behrbalk, Ofir Uri, Ruth M Parks, Michael Paul Grevitt, Marcus Rickert, Bronek Maximilian Boszczyk

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In one paragraph

Article in 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, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

16 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Evaluation of screw density in Lenke type 1 adolescent idiopathic scoliosis: are low and high-density constructs truly comparable?European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2025
    Article
  4. Review
  5. Article
  6. A Novel Surgical Indication for Scheuermann's Kyphosis.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2024
    Article
  7. Observational
  8. Observational
  9. Article
  10. Article
  11. Posterior-only versus combined anterior/posterior fusion in Scheuermann disease: a large retrospective study.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 · 2018
    Article
  12. Article
  13. Article
  14. Article
  15. Does surgery for Scheuermann kyphosis influence sagittal spinopelvic parameters?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 · 2015
    Article
  16. 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

6 authors.

Eyal BehrbalkThe Centre for Spinal Studies and Surgery, Queen's Medical Centre, Nottingham, UK, eyalbehrbalk@yahoo.com.
Ofir Uri
Ruth M Parks
Michael Paul Grevitt
Marcus Rickert
Bronek Maximilian Boszczyk

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionPosterior-only approach using pedicle screws' fixation has emerged as the preferred surgical technique for Scheuermann kyphosis (SK) correction. Insertion of multiple pedicle screws while increasing stability increases also the risk of complications related to screw malpositioning and surgical cost. The optimal screw density required in surgical correction of SK remains unclear. This study compares the safety and efficacy of low screw density (LSD) versus high screw density (HSD) technique used in posterior-only correction of SK.

methodsTwenty-one patients underwent surgical correction of SK between 2007 and 2011 and were reviewed after a mean of 29 months. HSD technique (i.e., 100 % of available pedicles, averaged 25.2 ± 4 screws) was used in 10 cases and LSD technique (i.e., 54-69 % of available pedicles in a pre-determined pattern, averaged 16.8 ± 1.3 screws; p < 0.001) was used in 11 cases. Kyphosis correction was assessed by comparing thoracic kyphosis, lumbar lordosis and sagittal balance on preoperative and postoperative radiographs. Cost saving analysis was performed for each group.

resultsPreoperative thoracic kyphosis, lumbar lordosis and sagittal balance were similar for both groups. The average postoperative kyphosis correction was similar in both HSD and LSD groups (29° ± 9° vs. 34° ± 6°, respectively; p = 0.14). Complication occurred in four patients (19 %) in the HSD group and in two patients (9 %) in the LSD group (p = 0.56). Three patients required re-operation. Compared to HSD using LSD saves 4,200 pounds sterling per patient in hardware and 88,200 pounds sterling for the entire cohort.

conclusionLSD technique is as safe and effective as HSD technique in posterior-only correction of SK. Implant-related cost could be reduced by 32 %.

Indexed as

AdolescentAdultChildCost SavingsFemaleFollow-Up StudiesHumansLumbar VertebraeMaleOutcome Assessment, Health CarePedicle ScrewsPostoperative ComplicationsRadiographyReoperationRetrospective StudiesScheuermann Disease

Identifiers

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Read underepoch 390

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.