Viscoelasticity of human oral mucosa: implications for masticatory biomechanics.
Identifieur interne : 003F27 ( Main/Exploration ); précédent : 003F26; suivant : 003F28Viscoelasticity of human oral mucosa: implications for masticatory biomechanics.
Auteurs : A. Sawada [Japon] ; N. Wakabayashi ; M. Ona ; T. SuzukiSource :
- Journal of dental research [ 1544-0591 ] ; 2011.
Descripteurs français
- KwdFr :
- Adulte d'âge moyen, Analyse des éléments finis, Analyse du stress dentaire (), Contrainte mécanique, Facteurs temps, Force occlusale, Humains, Mastication, Maxillaire (physiologie), Module d'élasticité, Modèles biologiques, Modèles linéaires, Muqueuse de la bouche (physiologie), Mâchoire édentée (physiopathologie), Phénomènes biomécaniques, Prothèse dentaire complète supérieure (effets indésirables), Prothèse dentaire partielle amovible (effets indésirables), Résistance à la compression, Sujet âgé, Viscosité.
- MESH :
- effets indésirables : Prothèse dentaire complète supérieure, Prothèse dentaire partielle amovible.
- physiologie : Maxillaire, Muqueuse de la bouche.
- physiopathologie : Mâchoire édentée.
- Adulte d'âge moyen, Analyse des éléments finis, Analyse du stress dentaire, Contrainte mécanique, Facteurs temps, Force occlusale, Humains, Mastication, Module d'élasticité, Modèles biologiques, Modèles linéaires, Phénomènes biomécaniques, Résistance à la compression, Sujet âgé, Viscosité.
English descriptors
- KwdEn :
- Aged, Biomechanical Phenomena, Bite Force, Compressive Strength, Dental Stress Analysis (methods), Denture, Complete, Upper (adverse effects), Denture, Partial, Removable (adverse effects), Elastic Modulus, Finite Element Analysis, Humans, Jaw, Edentulous (physiopathology), Linear Models, Mastication, Maxilla (physiology), Middle Aged, Models, Biological, Mouth Mucosa (physiology), Stress, Mechanical, Time Factors, Viscosity.
- MESH :
- adverse effects : Denture, Complete, Upper, Denture, Partial, Removable.
- methods : Dental Stress Analysis.
- physiology : Maxilla, Mouth Mucosa.
- physiopathology : Jaw, Edentulous.
- Aged, Biomechanical Phenomena, Bite Force, Compressive Strength, Elastic Modulus, Finite Element Analysis, Humans, Linear Models, Mastication, Middle Aged, Models, Biological, Stress, Mechanical, Time Factors, Viscosity.
Abstract
The dynamic behavior of oral soft tissues supporting removable prostheses is not well understood. We hypothesized that the stress and strain of the mucosa exhibited time-dependent behavior under masticatory loadings. Displacement of the mucosa on the maxillary residual ridge was measured in vivo by means of a magnetic actuator/sensor under vertical loading in partially edentulous individuals. Subject-specific finite element models of homogeneous bone and mucosa were constructed based on computed tomography images. A mean initial elastic modulus of 8.0 × 10(-5) GPa and relaxation time of 494 sec were obtained from the curve adaptation of the finite element output to the in vivo time-displacement relationship. Delayed increase of the maximum compressive strain on the surface of the mucosa was observed under sustained load, while the maximum strain inside the mucosa was relatively low and uninfluenced by the duration of the load. The compressive stress showed a slight decrease with sustained load, due to stress relaxation of the mucosa. On simulation of cyclic load, the increment of the maximum strain and the evidence of residual strain were revealed after each loading. The results support our hypothesis, and suggest that sustained and repetitive loads accumulate as surface strain on the mucosa.
DOI: 10.1177/0022034510396881
PubMed: 21321067
Affiliations:
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Sawada</name><affiliation wicri:level="4"><nlm:affiliation>Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University, Iwate, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Department of Removable Prosthodontics, School of Dentistry, Iwate Medical University, Iwate</wicri:regionArea><orgName type="university">Université de médecine d'Iwate</orgName><placeName><settlement type="city">Morioka</settlement><region type="prefecture">Préfecture d'Iwate</region></placeName></affiliation></author><author><name sortKey="Wakabayashi, N" sort="Wakabayashi, N" uniqKey="Wakabayashi N" first="N" last="Wakabayashi">N. Wakabayashi</name></author><author><name sortKey="Ona, M" sort="Ona, M" uniqKey="Ona M" first="M" last="Ona">M. Ona</name></author><author><name sortKey="Suzuki, T" sort="Suzuki, T" uniqKey="Suzuki T" first="T" last="Suzuki">T. Suzuki</name></author></analytic><series><title level="j">Journal of dental research</title><idno type="eISSN">1544-0591</idno><imprint><date when="2011" type="published">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aged</term><term>Biomechanical Phenomena</term><term>Bite Force</term><term>Compressive Strength</term><term>Dental Stress Analysis (methods)</term><term>Denture, Complete, Upper (adverse effects)</term><term>Denture, Partial, Removable (adverse effects)</term><term>Elastic Modulus</term><term>Finite Element Analysis</term><term>Humans</term><term>Jaw, Edentulous (physiopathology)</term><term>Linear Models</term><term>Mastication</term><term>Maxilla (physiology)</term><term>Middle Aged</term><term>Models, Biological</term><term>Mouth Mucosa (physiology)</term><term>Stress, Mechanical</term><term>Time Factors</term><term>Viscosity</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adulte d'âge moyen</term><term>Analyse des éléments finis</term><term>Analyse du stress dentaire ()</term><term>Contrainte mécanique</term><term>Facteurs temps</term><term>Force occlusale</term><term>Humains</term><term>Mastication</term><term>Maxillaire (physiologie)</term><term>Module d'élasticité</term><term>Modèles biologiques</term><term>Modèles linéaires</term><term>Muqueuse de la bouche (physiologie)</term><term>Mâchoire édentée (physiopathologie)</term><term>Phénomènes biomécaniques</term><term>Prothèse dentaire complète supérieure (effets indésirables)</term><term>Prothèse dentaire partielle amovible (effets indésirables)</term><term>Résistance à la compression</term><term>Sujet âgé</term><term>Viscosité</term></keywords><keywords scheme="MESH" qualifier="adverse effects" xml:lang="en"><term>Denture, Complete, Upper</term><term>Denture, Partial, Removable</term></keywords><keywords scheme="MESH" qualifier="effets indésirables" xml:lang="fr"><term>Prothèse dentaire complète supérieure</term><term>Prothèse dentaire partielle amovible</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Dental Stress Analysis</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Maxillaire</term><term>Muqueuse de la bouche</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Maxilla</term><term>Mouth Mucosa</term></keywords><keywords scheme="MESH" qualifier="physiopathologie" xml:lang="fr"><term>Mâchoire édentée</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Jaw, Edentulous</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Aged</term><term>Biomechanical Phenomena</term><term>Bite Force</term><term>Compressive Strength</term><term>Elastic Modulus</term><term>Finite Element Analysis</term><term>Humans</term><term>Linear Models</term><term>Mastication</term><term>Middle Aged</term><term>Models, Biological</term><term>Stress, Mechanical</term><term>Time Factors</term><term>Viscosity</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adulte d'âge moyen</term><term>Analyse des éléments finis</term><term>Analyse du stress dentaire</term><term>Contrainte mécanique</term><term>Facteurs temps</term><term>Force occlusale</term><term>Humains</term><term>Mastication</term><term>Module d'élasticité</term><term>Modèles biologiques</term><term>Modèles linéaires</term><term>Phénomènes biomécaniques</term><term>Résistance à la compression</term><term>Sujet âgé</term><term>Viscosité</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The dynamic behavior of oral soft tissues supporting removable prostheses is not well understood. We hypothesized that the stress and strain of the mucosa exhibited time-dependent behavior under masticatory loadings. Displacement of the mucosa on the maxillary residual ridge was measured in vivo by means of a magnetic actuator/sensor under vertical loading in partially edentulous individuals. Subject-specific finite element models of homogeneous bone and mucosa were constructed based on computed tomography images. A mean initial elastic modulus of 8.0 × 10(-5) GPa and relaxation time of 494 sec were obtained from the curve adaptation of the finite element output to the in vivo time-displacement relationship. Delayed increase of the maximum compressive strain on the surface of the mucosa was observed under sustained load, while the maximum strain inside the mucosa was relatively low and uninfluenced by the duration of the load. The compressive stress showed a slight decrease with sustained load, due to stress relaxation of the mucosa. On simulation of cyclic load, the increment of the maximum strain and the evidence of residual strain were revealed after each loading. The results support our hypothesis, and suggest that sustained and repetitive loads accumulate as surface strain on the mucosa.</div></front></TEI><affiliations><list><country><li>Japon</li></country><region><li>Préfecture d'Iwate</li></region><settlement><li>Morioka</li></settlement><orgName><li>Université de médecine d'Iwate</li></orgName></list><tree><noCountry><name sortKey="Ona, M" sort="Ona, M" uniqKey="Ona M" first="M" last="Ona">M. Ona</name><name sortKey="Suzuki, T" sort="Suzuki, T" uniqKey="Suzuki T" first="T" last="Suzuki">T. Suzuki</name><name sortKey="Wakabayashi, N" sort="Wakabayashi, N" uniqKey="Wakabayashi N" first="N" last="Wakabayashi">N. Wakabayashi</name></noCountry><country name="Japon"><region name="Préfecture d'Iwate"><name sortKey="Sawada, A" sort="Sawada, A" uniqKey="Sawada A" first="A" last="Sawada">A. Sawada</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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