Evidence map›Paper›PMID 34022860›Full record

ArticleBMC musculoskeletal disorders2021

Immersion in Raloxifene does not significantly improve bone toughness or screw pull-out strength in multiple in vitro models.

Michael R Eby, Danielle M Cristino, Matthew Counihan, Kendall M Masada, Jaimo Ahn, Michael W Hast

Open access · goldAbstract read
In one paragraph

Article in BMC musculoskeletal disorders, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
0.5field-weighted citation impact, top 36% 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

2 citing papers in PubMed, 4 citations in OpenAlex.

  1. Article
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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

6 authors at 2 institutions in 1 country.

Michael R EbyDepartment of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA.
Danielle M CristinoBiedermann Lab for Orthopaedic Research, University of Pennsylvania, 3450 Hamilton Walk, 373A Stemmler Hall, Philadelphia, PA, 19104, USA.
Matthew CounihanDepartment of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA.
Kendall M MasadaDepartment of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA.
Jaimo AhnDepartment of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI, USA.
Michael W HastBiedermann Lab for Orthopaedic Research, University of Pennsylvania, 3450 Hamilton Walk, 373A Stemmler Hall, Philadelphia, PA, 19104, USA. hast@pennmedicine.upenn.edu.
University of Pennsylvania · USUniversity of Michigan–Ann Arbor · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFailure of surgical fixation in orthopaedic fractures occurs at a significantly higher rate in osteoporotic patients due to weakened osteoporotic bone. A therapy to acutely improve the mechanical properties of bone during fracture repair would have profound clinical impact. A previous study has demonstrated an increase in mechanical properties of acellular cortical canine bone after immersion in raloxifene. The goal of this study was to determine if similar treatment yields the same results in cancellous fetal bovine bone and whether this translates into a difference in screw pull-out strength in human cadaveric tissue.

methodsCancellous bone from fetal bovine distal femora underwent quasi-static four-point bending tests after being immersed in either raloxifene (20 μM) or phosphate-buffered saline as a control for 7 days (n = 10). Separately, 5 matched pairs of human osteoporotic cadaveric humeral heads underwent the same procedure. Five 3.5 mm unicortical cancellous screws were then inserted at standard surgical fixation locations to a depth of 30 mm and quasi-static screw pull-out tests were performed.

resultsIn the four-point bending tests, there were no significant differences between the raloxifene and control groups for any of the mechanical properties - including stiffness (p = 0.333) and toughness (p = 0.546). In the screw pull-out tests, the raloxifene soaked samples and control samples had pullout strengths of 122 ± 74.3 N and 89.5 ± 63.8 N, respectively.

conclusionsResults from this study indicate that cancellous fetal bovine samples did not demonstrate an increase in toughness with raloxifene treatment, which is in contrast to previously published data that studied canine cortical bone. In vivo experiments are likely required to determine whether raloxifene will improve implant fixation.

Indexed as

ImmersionRaloxifene HydrochlorideAnimalsBiomechanical PhenomenaBone ScrewsCadaverCattleDogsHumansMaterials TestingRaloxifene HydrochlorideBiomechanicsCadavericFracture repairProximal humerusRaloxifene

Identifiers

PMID34022860
PMCPMC8141119
OpenAlexW3165376183

What OpenQuestion holds

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LicenceCC BY
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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.