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Finite element analysis animated simulation of velopharyngeal closure.
Cleft Palate Craniofac J. 2012 Jan; 49(1):44-50.CP

Abstract

OBJECTIVE

To use finite element analysis animated simulations to investigate factors affecting velopharyngeal closure.

DESIGN

A coronal section multicomponent finite element analysis model of a human soft palate was created in Simulia Abaqus 6.5-1 from high resolution MRI images of a single adult female subject, interpreted by reference to published anatomic dissections. Tissues were assigned hyperelastic property coefficients for neo-Hookean behavior, with gravity at 9.8 ms(-2) in the y-axis. Vector forces based on estimations in previous publications were applied throughout levator veli palatini and palatopharyngeus muscles, using a nonlinear analysis algorithm, to produce animated simulations of velopharyngeal space closure. Variation of levator veli palatini angle from 60° to 49°, the contribution of palatopharyngeus muscle, and the effect of submucous cleft were investigated for their effects on velopharyngeal closure.

RESULTS

The animated simulations showed anthropomorphic behavior and supported the previously suggested effects of the levator veli palatini angle, with reduced effectiveness of velopharyngeal closure as levator veli palatini angle decreases. Palatopharyngeus action reduced the efficiency of closure for a levator veli palatini angle of 60°, and a submucous cleft reduced this for both our normal subject and for a levator veli palatini angle of 60°, but both palatopharyngeus action and a submucous cleft enhanced closure for a levator veli palatini angle of 49°.

CONCLUSIONS

This study advances soft palate finite element analysis to a real-subject-based multicomponent hyperelastic model that demonstrates anthropomorphic behavior. Animated simulations using the model demonstrate the possible effects of levator veli palatini angle, a submucous cleft, and the contribution of the palatopharyngeus.

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Authors+Show Affiliations

Srodon PD
Vascular Clinical Academic Unit, St. Bartholomew's and The Royal London Hospitals, London, United Kingdom. paul.srodon@bartsandthelondon.nhs.uk
Miquel ME
No affiliation info available
Birch MJ
No affiliation info available

MeSH

AdultAnthropometryCadaverFemaleFinite Element AnalysisHumansMagnetic Resonance ImagingModels, AnatomicPalate, SoftPharyngeal MusclesSoftwareVelopharyngeal InsufficiencyVideo Recording

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21366493

Citation

Srodon, P D., et al. "Finite Element Analysis Animated Simulation of Velopharyngeal Closure." The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association, vol. 49, no. 1, 2012, pp. 44-50.
Srodon PD, Miquel ME, Birch MJ. Finite element analysis animated simulation of velopharyngeal closure. Cleft Palate Craniofac J. 2012;49(1):44-50.
Srodon, P. D., Miquel, M. E., & Birch, M. J. (2012). Finite element analysis animated simulation of velopharyngeal closure. The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association, 49(1), 44-50. https://doi.org/10.1597/10-131
Srodon PD, Miquel ME, Birch MJ. Finite Element Analysis Animated Simulation of Velopharyngeal Closure. Cleft Palate Craniofac J. 2012;49(1):44-50. PubMed PMID: 21366493.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Finite element analysis animated simulation of velopharyngeal closure. AU - Srodon,P D, AU - Miquel,M E, AU - Birch,M J, Y1 - 2011/03/02/ PY - 2011/3/4/entrez PY - 2011/3/4/pubmed PY - 2015/9/26/medline SP - 44 EP - 50 JF - The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association JO - Cleft Palate Craniofac J VL - 49 IS - 1 N2 - OBJECTIVE: To use finite element analysis animated simulations to investigate factors affecting velopharyngeal closure. DESIGN: A coronal section multicomponent finite element analysis model of a human soft palate was created in Simulia Abaqus 6.5-1 from high resolution MRI images of a single adult female subject, interpreted by reference to published anatomic dissections. Tissues were assigned hyperelastic property coefficients for neo-Hookean behavior, with gravity at 9.8 ms(-2) in the y-axis. Vector forces based on estimations in previous publications were applied throughout levator veli palatini and palatopharyngeus muscles, using a nonlinear analysis algorithm, to produce animated simulations of velopharyngeal space closure. Variation of levator veli palatini angle from 60° to 49°, the contribution of palatopharyngeus muscle, and the effect of submucous cleft were investigated for their effects on velopharyngeal closure. RESULTS: The animated simulations showed anthropomorphic behavior and supported the previously suggested effects of the levator veli palatini angle, with reduced effectiveness of velopharyngeal closure as levator veli palatini angle decreases. Palatopharyngeus action reduced the efficiency of closure for a levator veli palatini angle of 60°, and a submucous cleft reduced this for both our normal subject and for a levator veli palatini angle of 60°, but both palatopharyngeus action and a submucous cleft enhanced closure for a levator veli palatini angle of 49°. CONCLUSIONS: This study advances soft palate finite element analysis to a real-subject-based multicomponent hyperelastic model that demonstrates anthropomorphic behavior. Animated simulations using the model demonstrate the possible effects of levator veli palatini angle, a submucous cleft, and the contribution of the palatopharyngeus. SN - 1545-1569 UR - https://www.unboundmedicine.com/medline/citation/21366493/Finite_element_analysis_animated_simulation_of_velopharyngeal_closure_ L2 - https://journals.sagepub.com/doi/10.1597/10-131?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -