Análise fotoelástica da distribuição de tensões peri-implantares em overdenture mandibular retida por implante unitário com diferentes tipos de conexão

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dc.contributor.advisor1Leles, Cláudio Rodrigues
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/6740286066154410por
dc.creatorNascimento, João Francisco Machado do
dc.creator.Latteshttp://lattes.cnpq.br/0058867283070284por
dc.date.accessioned2014-09-02T11:26:28Z
dc.date.issued2013-08-14
dc.description.abstractFor patients poorly adapted to conventional dentures, the single-implant mandibular overdenture has been proposed as a simplified alternative for the two-implant treatment, together with the use of immediate loading of the implant. The aim of this in vitro study was to compare the photoelastic characteristics of stress transfer to the implant in a single-implant mandibular overdenture using different types of attachments. A photoelastic model of an edentulous mandible with a resilient edentulous ridge and a unique implant located at the symphyseal region was obtained to reproduce a single implant-retained mandibular overdenture. Six 2.0 mm height attachments were selected and inserted in the same photoelastic model in a random order. A universal material testing machine was used to induce axial vertical loads of 70 N applied in the central incisor and in the central region of the first right molar without contact on the contralateral side. The photoelastic analysis was performed using a polariscope integrated into the testing machine. Standard separate views were photographed and evaluated visually for stress-induced fringes, to comparatively rank the different attachment systems. All attachments showed a similar tension distribution concentrated in the apical third, and the highest stress concentration at the apical level. There was a low stress concentration at the coronal third of the implant, with no discernible stress in the first threads of the implants, except for Dalla Bona which showed low stress at the coronal part of the implant (one fringe). No identifiable fringes were observed when the load was applied in the molar region, which resulted from the low amount of stress transmitted by the implant for all attachments. It was concluded that the load transferred to a single mandibular implant is low and within the limits of functional loading, irrespective of the type of retention system.eng
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dc.description.provenanceMade available in DSpace on 2014-09-02T11:26:28Z (GMT). No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Dissertação Joao Francisco Machado do Nascimento.pdf: 721039 bytes, checksum: 2a145e907cf0cfc7e15f26459ae30aff (MD5) Previous issue date: 2013-08-14eng
dc.description.resumoImplantes osseointegrados vêm sendo utilizados com sucesso para restaurar a função e a estética de pacientes desdentados totais e parciais. No entanto há necessidade de tornar o tratamento de pessoas com necessidade de overdenture retida com implante menos oneroso e mais eficiente. O objetivo deste trabalho foi verificar pela técnica fotoelástica (Qualitativa) as tensões geradas ao redor do implante pela aplicação de carga sobre overdenture mandibular retida por um implante unitário na sínfise da mandibular. Foi confeccionado um modelo de resina fotoelástica Araldite, reproduzido de uma mandibular anatômica, onde foi fixado na região sínfise um implante 3.75x11mm (Titamax Ti Cortical, Neodent, Curitiba, Brasil). Com um modelo foi confeccionada uma prótese total e gingival artificial. Todos os pilares foram posicionados sobre o implante e apertado com 10 Ncm, a fêmea foi capturada de forma direta à prótese, com a réplica da mucosa em posição. Todos foram sucessivamente capturados e levados ‘à máquina de ensaio universal. Com uma carga axial de 70 Ncm na fossa central do 46 e incisal do 41. Foram fotografados em um polariscópio as franjas resultantes das tensões. Foram feitas análises qualitativa dos resultados das tensões sobre o attachment. De acordo com os resultados obtidos pode-se concluir que a carga transferida para o implante, é baixo, independente do sistema de retenção.por
dc.description.sponsorshipConselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPqpor
dc.formatapplication/pdf*
dc.identifier.citationNASCIMENTO, João Francisco Machado do. Análise fotoelástica da distribuição de tensões peri-implantares em overdenture mandibular retida por implante unitário com diferentes tipos de conexão. 2013. 54 f. Dissertação(Mestrado em Ciências da Saúde (FM)) - Universidade Federal de Goiás, Goiânia, 2013.por
dc.identifier.urihttp://repositorio.bc.ufg.br/tede/handle/tde/2980
dc.languageporpor
dc.publisherUniversidade Federal de Goiáspor
dc.publisher.countryBrasilpor
dc.publisher.departmentFaculdade de Medicina - FM (RG)por
dc.publisher.initialsUFGpor
dc.publisher.programPrograma de Pós-graduação em Ciências da Saúde (FM)por
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dc.rightsAcesso abertopor
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectEdentulismopor
dc.subjectsobredentadura mandibularpor
dc.subjectanálise fotoelásticapor
dc.subjectEdentulismeng
dc.subjectmandibular overdentureeng
dc.subjectphotoelastic stress analysiseng
dc.subject.cnpqCIENCIAS DA SAUDE::ODONTOLOGIApor
dc.thumbnail.urlhttp://repositorio.bc.ufg.br/tede/retrieve/6937/Disserta%c3%a7%c3%a3o%20Joao%20Francisco%20Machado%20do%20Nascimento.pdf.jpg*
dc.titleAnálise fotoelástica da distribuição de tensões peri-implantares em overdenture mandibular retida por implante unitário com diferentes tipos de conexãopor
dc.title.alternativePhotoelastic stress distribution produced by different retention systems for a single-implant mandibular overdentureeng
dc.typeDissertaçãopor

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