Comparison of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible--a computed tomography-based three-dimensional finite element analysis.
Identifieur interne : 000198 ( Ncbi/Curation ); précédent : 000197; suivant : 000199Comparison of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible--a computed tomography-based three-dimensional finite element analysis.
Auteurs : V A R. Barão [Brésil] ; J A Delben ; J. Lima ; T. Cabral ; W G AssunçãoSource :
- Journal of biomechanics [ 1873-2380 ] ; 2013.
Descripteurs français
- KwdFr :
- MESH :
- imagerie diagnostique : Mandibule.
- physiopathologie : Mandibule.
- Adulte d'âge moyen, Conception de prothèse dentaire, Contrainte mécanique, Humains, Implants dentaires, Mâle, Overdenture, Radiographie.
English descriptors
- KwdEn :
- MESH :
- chemical : Dental Implants.
- diagnostic imaging : Mandible.
- physiopathology : Mandible.
- Dental Prosthesis Design, Denture, Overlay, Humans, Male, Middle Aged, Radiography, Stress, Mechanical.
Abstract
A finite element analysis was used to compare the effect of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible. Four models of an human mandible were constructed. In the OR (O'ring) group, the mandible was restored with an overdenture retained by four unsplinted implants with O'ring attachment; in the BC (bar-clip) -C and BC groups, the mandibles were restored with overdentures retained by four splinted implants with bar-clip anchor associated or not with two distally placed cantilevers, respectively; in the FD (fixed denture) group, the mandible was restored with a fixed full-arch four-implant-supported prosthesis. Models were supported by the masticatory muscles and temporomandibular joints. A 100-N oblique load was applied on the left first molar. Von Mises (σvM), maximum (σmax) and minimum (σmin) principal stresses (in MPa) analyses were obtained. BC-C group exhibited the highest stress values (σvM=398.8, σmax=580.5 and σmin=-455.2) while FD group showed the lowest one (σvM=128.9, σmax=185.9 and σmin=-172.1). Within overdenture groups, the use of unsplinted implants reduced the stress level in the implant/prosthetic components (59.4% for σvM, 66.2% for σmax and 57.7% for σmin versus BC-C group) and supporting tissues (maximum stress reduction of 72% and 79.5% for σmax, and 15.7% and 85.7% for σmin on the cortical and trabecular bones, respectively). Cortical bone exhibited greater stress concentration than the trabecular bone for all groups. The use of fixed implant dentures and removable dentures retained by unsplinted implants to rehabilitate edentulous mandible reduced the stresses in the periimplant bone tissue, mucosa and implant/prosthetic components.
DOI: 10.1016/j.jbiomech.2013.02.008
PubMed: 23518207
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Barão</name><affiliation wicri:level="3"><nlm:affiliation>Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista (UNESP), Sao Paulo, Brazil.</nlm:affiliation><country xml:lang="fr">Brésil</country><wicri:regionArea>Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista (UNESP), Sao Paulo</wicri:regionArea><placeName><settlement type="city">São Paulo</settlement><region type="state">État de São Paulo</region></placeName></affiliation></author><author><name sortKey="Delben, J A" sort="Delben, J A" uniqKey="Delben J" first="J A" last="Delben">J A Delben</name></author><author><name sortKey="Lima, J" sort="Lima, J" uniqKey="Lima J" first="J" last="Lima">J. Lima</name></author><author><name sortKey="Cabral, T" sort="Cabral, T" uniqKey="Cabral T" first="T" last="Cabral">T. Cabral</name></author><author><name sortKey="Assuncao, W G" sort="Assuncao, W G" uniqKey="Assuncao W" first="W G" last="Assunção">W G Assunção</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2013">2013</date><idno type="RBID">pubmed:23518207</idno><idno type="pmid">23518207</idno><idno type="doi">10.1016/j.jbiomech.2013.02.008</idno><idno type="wicri:Area/PubMed/Corpus">000279</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000279</idno><idno type="wicri:Area/PubMed/Curation">000279</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000279</idno><idno type="wicri:Area/PubMed/Checkpoint">000279</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">000279</idno><idno type="wicri:Area/Ncbi/Merge">000198</idno><idno type="wicri:Area/Ncbi/Curation">000198</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Comparison of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible--a computed tomography-based three-dimensional finite element analysis.</title><author><name sortKey="Barao, V A R" sort="Barao, V A R" uniqKey="Barao V" first="V A R" last="Barão">V A R. Barão</name><affiliation wicri:level="3"><nlm:affiliation>Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista (UNESP), Sao Paulo, Brazil.</nlm:affiliation><country xml:lang="fr">Brésil</country><wicri:regionArea>Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista (UNESP), Sao Paulo</wicri:regionArea><placeName><settlement type="city">São Paulo</settlement><region type="state">État de São Paulo</region></placeName></affiliation></author><author><name sortKey="Delben, J A" sort="Delben, J A" uniqKey="Delben J" first="J A" last="Delben">J A Delben</name></author><author><name sortKey="Lima, J" sort="Lima, J" uniqKey="Lima J" first="J" last="Lima">J. Lima</name></author><author><name sortKey="Cabral, T" sort="Cabral, T" uniqKey="Cabral T" first="T" last="Cabral">T. Cabral</name></author><author><name sortKey="Assuncao, W G" sort="Assuncao, W G" uniqKey="Assuncao W" first="W G" last="Assunção">W G Assunção</name></author></analytic><series><title level="j">Journal of biomechanics</title><idno type="eISSN">1873-2380</idno><imprint><date when="2013" type="published">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Dental Implants</term><term>Dental Prosthesis Design</term><term>Denture, Overlay</term><term>Humans</term><term>Male</term><term>Mandible (diagnostic imaging)</term><term>Mandible (physiopathology)</term><term>Middle Aged</term><term>Radiography</term><term>Stress, Mechanical</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adulte d'âge moyen</term><term>Conception de prothèse dentaire</term><term>Contrainte mécanique</term><term>Humains</term><term>Implants dentaires</term><term>Mandibule (imagerie diagnostique)</term><term>Mandibule (physiopathologie)</term><term>Mâle</term><term>Overdenture</term><term>Radiographie</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Dental Implants</term></keywords><keywords scheme="MESH" qualifier="diagnostic imaging" xml:lang="en"><term>Mandible</term></keywords><keywords scheme="MESH" qualifier="imagerie diagnostique" xml:lang="fr"><term>Mandibule</term></keywords><keywords scheme="MESH" qualifier="physiopathologie" xml:lang="fr"><term>Mandibule</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Mandible</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Dental Prosthesis Design</term><term>Denture, Overlay</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Radiography</term><term>Stress, Mechanical</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adulte d'âge moyen</term><term>Conception de prothèse dentaire</term><term>Contrainte mécanique</term><term>Humains</term><term>Implants dentaires</term><term>Mâle</term><term>Overdenture</term><term>Radiographie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A finite element analysis was used to compare the effect of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible. Four models of an human mandible were constructed. In the OR (O'ring) group, the mandible was restored with an overdenture retained by four unsplinted implants with O'ring attachment; in the BC (bar-clip) -C and BC groups, the mandibles were restored with overdentures retained by four splinted implants with bar-clip anchor associated or not with two distally placed cantilevers, respectively; in the FD (fixed denture) group, the mandible was restored with a fixed full-arch four-implant-supported prosthesis. Models were supported by the masticatory muscles and temporomandibular joints. A 100-N oblique load was applied on the left first molar. Von Mises (σvM), maximum (σmax) and minimum (σmin) principal stresses (in MPa) analyses were obtained. BC-C group exhibited the highest stress values (σvM=398.8, σmax=580.5 and σmin=-455.2) while FD group showed the lowest one (σvM=128.9, σmax=185.9 and σmin=-172.1). Within overdenture groups, the use of unsplinted implants reduced the stress level in the implant/prosthetic components (59.4% for σvM, 66.2% for σmax and 57.7% for σmin versus BC-C group) and supporting tissues (maximum stress reduction of 72% and 79.5% for σmax, and 15.7% and 85.7% for σmin on the cortical and trabecular bones, respectively). Cortical bone exhibited greater stress concentration than the trabecular bone for all groups. The use of fixed implant dentures and removable dentures retained by unsplinted implants to rehabilitate edentulous mandible reduced the stresses in the periimplant bone tissue, mucosa and implant/prosthetic components.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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