Evidence map›Paper›PMID 26720757›Full record

ArticleJAMA facial plastic surgery

A Finite Element Model to Simulate Formation of the Inverted-V Deformity.

Tjoson Tjoa, Cyrus T Manuel, Ryan P Leary, Rani Harb, Dmitriy E Protsenko, Brian J F Wong

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

Article in JAMA facial plastic surgery. 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
2.1field-weighted citation impact, top 13% 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, 14 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

6 authors at 3 institutions in 1 country.

Tjoson TjoaDepartment of Otolaryngology, Massachusetts Eye & Ear Infirmary, Boston.
Cyrus T ManuelBeckman Laser Institute, University of California, Irvine.
Ryan P LearyBeckman Laser Institute, University of California, Irvine.
Rani HarbBeckman Laser Institute, University of California, Irvine.
Dmitriy E ProtsenkoBeckman Laser Institute, University of California, Irvine.
Brian J F WongBeckman Laser Institute, University of California, Irvine3Department of Otolaryngology, University of California, Irvine.
Beckman Laser Institute and Medical Clinic · USMassachusetts Eye and Ear Infirmary · USUniversity of California, Irvine · US

Funding

University of California Health Participation in the National COVID Cohort Collaborative (N3C)UL1TR001414 · NCATS · UNIVERSITY OF CALIFORNIA-IRVINE · PI COOPER, DAN M, VILAIN, ERIC J. · 2015 to 2023
$35.1M
Institute for Clinical and Translational ScienceUL1TR000153 · NCATS · UNIVERSITY OF CALIFORNIA-IRVINE · PI COOPER, DAN M · 2012 to 2015
$12.1M
Electromechanical reshaping of tissueR21DE019026 · NIDCR · UNIVERSITY OF CALIFORNIA-IRVINE · PI WONG, BRIAN · 2009 to 2010
$419k
NCATS NIH HHS UL1TR000153NCATS NIH HHS UL1 TR001414NIDCR NIH HHS R21 DE019026NIDCR NIH HHS R21DE019026-01A2
6 · The paper itself

Abstract

importanceComputational modeling can be used to mimic the forces acting on the nasal framework that lead to the inverted-V deformity (IVD) after surgery and potentially determine long-range outcomes.

objectiveTo demonstrate the use of the finite element method (FEM) to predict the formation of the IVD after separation of the upper lateral cartilages (ULCs) from the nasal septum. DESIGN, SETTING, AND

participantsA computer model of a nose was derived from human computed tomographic data. The septum and upper and lower lateral cartilages were designed to fit within the soft-tissue envelope using computer-aided design software. Mechanical properties were obtained from the literature. The 3 simulations created included (1) partial fusion of the ULCs to the septum, (2) separation of the ULCs from the septum, and (3) a fully connected model to serve as a control. Forces caused by wound healing were prescribed at the junction of the disarticulated ULCs and septum. Using FEM software, equilibrium stress and strain were calculated. Displacement of the soft tissue along the nasal dorsum was measured and evaluated for evidence of morphologic change consistent with the IVD. MAIN OUTCOME AND MEASURES: Morphologic changes on the computer models in response to each simulation.

resultsWhen a posteroinferior force vector was applied along the nasal dorsum, the areas of highest stress were along the medial edge of the ULCs and at the junction of the ULCs and the nasal bones. With full detachment of ULCs and the dorsal septum, the characteristic IVD was observed. Both separation FEMs produced a peak depression of 0.3 mm along the nasal dorsum. CONCLUSIONS AND RELEVANCE: The FEM can be used to simulate the long-term structural complications of a surgical maneuver in rhinoplasty, such as the IVD. When applied to other rhinoplasty maneuvers, the use of FEMs may be useful to simulate the long-term outcomes, particularly when long-term clinical results are not available. In the future, use of FEMs may simulate rhinoplasty results beyond simply morphing the outer contours of the nose and allow estimation of potentially long-term clinical outcomes that may not be readily apparent. LEVEL OF EVIDENCE: NA.

Indexed as

Computer SimulationFinite Element AnalysisModels, AnatomicBiomechanical PhenomenaComputer-Aided DesignHumansNasal CartilagesNasal SeptumPostoperative ComplicationsRhinoplastyTomography, X-Ray Computed

Identifiers

PMID26720757
PMCPMC5828020
OpenAlexW2206172760

What OpenQuestion holds

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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.