Prótese protocolo com barra pré-fabricada: comportamento ósseo variando o tipo de osso e a configuração horizontal do arco mandibular no MEF-3D
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Data
2008-08-21
Autores
Almeida, Erika Oliveira de [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A barra pré-fabricada é uma opção de tratamento vantajosa por minimizar o tempo de confecção da prótese implantossuportada do tipo protocolo de carga imediata com níveis de adaptação e passividade previsíveis. No entanto, para a sua aplicação, o arco do paciente deve adaptar-se anatomicamente ao formato da barra pré-fabricada, e a qualidade óssea deve ser compatível com a indicação da carga imediata. Além disso, a literatura não apresenta dados numéricos sobre a influência de diferentes formatos horizontais do arco mandibular na distribuição das tensões no osso, assim como não é homogênea a definição do critério de análise a ser utilizado quando materiais frágeis, como o osso, são estudados utilizando o método dos elementos finitos. Devido a isso, foi realizada uma revisão da literatura com o objetivo de relacionar as propriedades dos materiais estudados com o critério de análise adotado. Para isto, foram levantados 2061 artigos através do indexador Medline database, durante os anos de 2004 a 2008. Observou-se que tanto o critério das tensões de von Mises como a máxima tensão principal foram utilizados para o estudo dos materiais considerados frágeis ou não. Para o estudo da influência de diferentes formatos horizontais do arco mandibular e diferentes tipos de osso na distribuição das tensões no osso cortical e medular na simulação de uma prótese fixa implantossuportada do tipo protocolo mandibular confeccionada através do sistema pré-fabricado Neopronto (Neodent, Implante Osseointegrável), quatro modelos (M) representativos...
Prefabricated bar is a profitable treatment option for minimizing the preparation time of fixed protocol-type prosthesis in immediate load with adaptation levels and predictable passivity. Nevertheless, in order to be applied, the patient's arch must be anatomically adapted to the format of the prefabricated bar, and bone quality must be compatible to immediate load indication. However, literature does not show any numerical data about the influence of different horizontal formats of the mandibular arch on bone stress distribution, as well as it is not homogeneous which analysis criterion is to be used when friable materials, such as the bone, are studied by making use of the finite element method. Due to this, a literature review was elaborated with the purpose to relate the materials' properties through the adopted analysis criterion. Therefore, 2061 articles were raised through the Medline Database Indexer from 2004 to 2008. It was noticed that not only Von Mises's equivalent stress criterion but also maximum principal stress were used for the study of materials considered as friable or not. For the study of the influence of different horizontal formats of mandibular archs and different types of bone in stress distribution on the cortical and medular bone in simulating a fixed implant-supported protocol-type mandibular prosthesis prepared through the Neopronto prefabricated system (Neodent, Osseointegratable Implant), four representative models (M) of a totally endentulate mandibular arch restored by the Neopronto prefabricated system (Neodent, Osseointegratable Implant) over four interforaminal implants were prepared through the SolidWorks 2007 program with a bone range (I to IV) (M.I - M.II - M.III - M.IV), considering the horizontal dimension as of regular size... (Complete abstract click electronic access below)
Prefabricated bar is a profitable treatment option for minimizing the preparation time of fixed protocol-type prosthesis in immediate load with adaptation levels and predictable passivity. Nevertheless, in order to be applied, the patient's arch must be anatomically adapted to the format of the prefabricated bar, and bone quality must be compatible to immediate load indication. However, literature does not show any numerical data about the influence of different horizontal formats of the mandibular arch on bone stress distribution, as well as it is not homogeneous which analysis criterion is to be used when friable materials, such as the bone, are studied by making use of the finite element method. Due to this, a literature review was elaborated with the purpose to relate the materials' properties through the adopted analysis criterion. Therefore, 2061 articles were raised through the Medline Database Indexer from 2004 to 2008. It was noticed that not only Von Mises's equivalent stress criterion but also maximum principal stress were used for the study of materials considered as friable or not. For the study of the influence of different horizontal formats of mandibular archs and different types of bone in stress distribution on the cortical and medular bone in simulating a fixed implant-supported protocol-type mandibular prosthesis prepared through the Neopronto prefabricated system (Neodent, Osseointegratable Implant), four representative models (M) of a totally endentulate mandibular arch restored by the Neopronto prefabricated system (Neodent, Osseointegratable Implant) over four interforaminal implants were prepared through the SolidWorks 2007 program with a bone range (I to IV) (M.I - M.II - M.III - M.IV), considering the horizontal dimension as of regular size... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Método dos elementos finitos, Biomecânica, Análise de elemento finito, Osseointegração, Finite element analysis, Biomechanics, Bone and bones, Osseointegration
Como citar
ALMEIDA, Erika Oliveira de. Prótese protocolo com barra pré-fabricada: comportamento ósseo variando o tipo de osso e a configuração horizontal do arco mandibular no MEF-3D. 2008. 115 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Odontologia de Araçatuba, 2008.