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PPG_31491 | 344.54 KB | Adobe PDF |
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Advisor(s)
Abstract(s)
As resinas compostas fotoativadas sofrem uma contração volumétrica que resulta na sua passagem do estado viscoso para um estado sólido, contração essa que gera tensão entre as paredes cavitárias e o material restaurador. Para minimizar a ocorrência desta situação, e visando um maior sucesso clínico, existem alguns procedimentos que devem ser do conhecimento do Médico Dentista.
Pretende-se, com esta dissertação, explorar a temática da contração de polimerização das resinas compostas, atualizando o conceito, bem como enumerar os fatores e consequências associados e, ainda, abordar os procedimentos clínicos que visam a sua redução. Para isso, foi realizada uma revisão de literatura nas bases de dados PubMed/Medline, B-On e Scielo.
Apesar da abundância de estudos recentes disponíveis, destaca-se a necessidade da realização de novas pesquisas que visem uma maior elucidação sobre o tema, nomeadamente, em relação à associação dos diversos fatores envolvidos e, ainda, no desenvolvimento de novos materiais restauradores.
Photoactivated composite resins, while undergoing a change in physical state from viscous to solid, go through a volumetric contraction, which additionally generates stress between cavity walls and the restoring material. In order to minimize this phenomenon and for the purpose of achieving the best clinical outcome, there are some procedures that should be well known by the dental professionals. This dissertation aims to understand composite resins’ polymerization shrinkage, providing a concept update and exploring the several factors and consequences related to it, as well as the clinical procedures that enable its reduction. A literature review was performed on the PubMed/Medline, B-On and Scielo databases. Despite the abundance of available recent studies, it proves necessary to carry out further research aimed at elucidating the subject, namely in regard to the association of the various factors involved and, also, in the development of new restorative materials.
Photoactivated composite resins, while undergoing a change in physical state from viscous to solid, go through a volumetric contraction, which additionally generates stress between cavity walls and the restoring material. In order to minimize this phenomenon and for the purpose of achieving the best clinical outcome, there are some procedures that should be well known by the dental professionals. This dissertation aims to understand composite resins’ polymerization shrinkage, providing a concept update and exploring the several factors and consequences related to it, as well as the clinical procedures that enable its reduction. A literature review was performed on the PubMed/Medline, B-On and Scielo databases. Despite the abundance of available recent studies, it proves necessary to carry out further research aimed at elucidating the subject, namely in regard to the association of the various factors involved and, also, in the development of new restorative materials.
Description
Keywords
Contração de polimerização Resinas compostas fotoativadas Fase pré-gel Fator C Técnicas incrementais Tensões de contração de polimerização Polymerization shrinkage Photoactivated composite resins Pre-gel phase C Factor Incremental techniques Polymerization shrinkage stress