Evidence map›Paper›PMID 25891012›Full record

ArticleThe Laryngoscope2015

Biomechanical evaluation of human and porcine auricular cartilage.

David A Zopf, Colleen L Flanagan, Hassan B Nasser, Anna G Mitsak, Farhan S Huq, Vishnu Rajendran, Glenn E Green, Scott J Hollister

Open access · greenAbstract read
In one paragraph

Article in The Laryngoscope, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
4.4field-weighted citation impact, top 6% 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

23 citing papers in PubMed, 52 citations in OpenAlex.

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  20. [Mechanical study of polyurethane elastomer and Medpor as the material of artificial auricular scaffold].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2019
    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

8 authors at 1 institution in 1 country.

David A ZopfDepartment of Otolaryngology-Head and Neck Surgery, Division of Pediatric Otolaryngology, University of Michigan Medical School, Ann Arbor, Michigan.
Colleen L FlanaganDepartment of Biomedical Engineering, Department of Mechanical Engineering and Department of Surgery, University of Michigan, Ann Arbor, Michigan, U.S.A.
Hassan B NasserDepartment of Otolaryngology-Head and Neck Surgery, Division of Pediatric Otolaryngology, University of Michigan Medical School, Ann Arbor, Michigan.
Anna G MitsakDepartment of Biomedical Engineering, Department of Mechanical Engineering and Department of Surgery, University of Michigan, Ann Arbor, Michigan, U.S.A.
Farhan S HuqDepartment of Otolaryngology-Head and Neck Surgery, Division of Pediatric Otolaryngology, University of Michigan Medical School, Ann Arbor, Michigan.
Vishnu RajendranDepartment of Biomedical Engineering, Department of Mechanical Engineering and Department of Surgery, University of Michigan, Ann Arbor, Michigan, U.S.A.
Glenn E GreenDepartment of Otolaryngology-Head and Neck Surgery, Division of Pediatric Otolaryngology, University of Michigan Medical School, Ann Arbor, Michigan.
Scott J HollisterDepartment of Biomedical Engineering, Department of Mechanical Engineering and Department of Surgery, University of Michigan, Ann Arbor, Michigan, U.S.A.
University of Michigan–Ann Arbor · US

Funding

MICHIGAN INSTITUTE FOR CLINICAL AND HEALTH RESEARCH (MICHR) (UL1): (BPCA)UL1RR024986 · NCRR · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI SHANLEY, THOMAS P. · 2007 to 2011
$51.2M
Michigan Institute for Clinical and Health Research (MCHR)UL1TR000433 · NCATS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI MASHOUR, GEORGE ALEXANDER · 2012 to 2016
$49.9M
Advanced Research Training in OtolaryngologyT32DC005356 · NIDCD · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI CORFAS, GABRIEL · 2002 to 2021
$3.5M
NCATS NIH HHS UL1 TR000433NCRR NIH HHS UL1 RR024986NIDCD NIH HHS T32 DC005356
6 · The paper itself

Abstract

objectives/hypothesisThe mechanical properties of normal auricular cartilage provide a benchmark against which to characterize changes in auricular structure/function due to genetic defects creating phenotypic abnormalities in collagen subtypes. Such properties also provide inputs/targets for auricular reconstruction scaffold design. Several studies report the biomechanical properties for septal, costal, and articular cartilage. However, analogous data for auricular cartilage are lacking. Therefore, our aim in this study was to characterize both whole-ear and auricular cartilage mechanics by mechanically testing specimens and fitting the results to nonlinear constitutive models. STUDY

designMechanical testing of whole ears and auricular cartilage punch biopsies.

methodsWhole human cadaveric ear and auricular cartilage punch biopsies from both porcine and human cartilage were subjected to whole-ear helix-down compression and quasistatic unconfined compression tests. Common hyperelastic constitutive laws (widely used to characterize soft tissue mechanics) were evaluated for their ability to represent the stress-strain behavior of auricular cartilage.

resultsLoad displacement curves for whole ear testing exhibited compliant linear behavior until after significant displacement where nonlinear stiffening occurred. All five commonly used two-term hyperelastic soft tissue constitutive models successfully fit both human and porcine nonlinear elastic behavior (mean R(2) fit >0.95).

conclusionsAuricular cartilage exhibits nonlinear strain-stiffening elastic behavior that is similar to other soft tissues in the body. The whole ear exhibits compliant behavior with strain stiffening at high displacement. The constants from the hyperelastic model fits provide quantitative baselines for both human and porcine (a commonly used animal model for auricular tissue engineering) auricular mechanics. LEVEL OF EVIDENCE: NA

Indexed as

AgedAged, 80 and overAnimalsBiomechanical PhenomenaBiopsyCadaverEar CartilageFemaleHumansMaleMiddle AgedReference ValuesSwineAuricular cartilageauricular tissue engineeringbiomechanicscartilage computational modelingnonlinear elasticity

Identifiers

PMID25891012
PMCPMC4512857
OpenAlexW1895492708

What OpenQuestion holds

Textmetadata
LicenceTDM
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.