Revista de Odontologia da UNESP
https://revodontolunesp.com.br/article/588017dd7f8c9d0a098b494c
Revista de Odontologia da UNESP
Review Article

Degradação das interfaces resina-dentina: uma revisão da literatura

Degradation of resin-dentin interfaces: a literature review

Reis, A.F.; Cassoni, A.; Kirihata, M.; Sapata, A.S.P.; Atuí, R.A.F.L.; Pereira, P.N.R.; Giannini, M.

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Resumo

Restaurações adesivas vêm sendo amplamente utilizadas em diversos procedimentos odontológicos na atualidade. Diversas pesquisas demonstram uma união satisfatória dos materiais resinosos à dentina, principalmente logo após sua aplicação. No entanto, a efetividade dos procedimentos restauradores adesivos promovida por diferentes protocolos de aplicação tem sido questionada com relação à durabilidade da união ao substrato dentinário. A degradação da união, atribuída principalmente à hidrólise dos componentes resinosos e à digestão enzimática dos constituintes da interface, tem se mostrado mais severa para alguns sistemas adesivos do que para outros. O objetivo desta revisão de literatura foi abordar os possíveis mecanismos de degradação das interfaces resina-dentina obtidas com os diferentes protocolos de aplicação disponíveis atualmente. Foram analisadas as diferentes metodologias para estudar o comportamento das interfaces ao longo do tempo. Os estudos das propriedades físico-mecânicas das interfaces e da nanoinfiltração têm se mostrado ferramentas importantes para estimar a longevidade dos adesivos no meio oral. Os trabalhos mostram que a nanoinfiltração ocorre com diferentes severidades, mas praticamente em todos os adesivos. A maioria dos materiais mostra-se eficiente logo após a sua aplicação; no entanto, o comportamento da união ao longo do tempo ante a presença de água varia consideravelmente. Os adesivos autocondicionantes de passo único são os mais susceptíveis à degradação após armazenagem em água. De acordo com os trabalhos revistos, concluiu-se que a degradação da união está relacionada à hidrofilia dos materiais.

Palavras-chave

Adesivos dentinários, degradação, dentina

Abstract

Adhesive restorations have been increasingly used in many dental procedures in the latest years. Several studies have demonstrated an effective bonding to dentin, especially immediately after application. However, the effectiveness of adhesive restorative procedures has been questioned with regard to the durability of the bond to dentin substrate. Degradation of bonds has been attributed to hydrolysis of resinous components or to enzymatic digestion of the resin-dentin interface, and has been shown to occur in different rates for different adhesive systems. The aim of this literature review was to examine the possible degradation mechanisms of resin-dentin interfaces obtained with currently available adhesive systems of different application protocols. Different methods for studying resin-dentin interfaces behavior over time were examined. The studies of interfaces physicomechanical properties and nanoleakage patterns have been proven to be important tools for predicting the long-term behavior of adhesive systems in the oral environment. The studies have demonstrated that no adhesive system is able of totally preventing nanoleakage. Most adhesives proved to be effective right after application; however, the behavior of bonded interfaces after long-term water-storage varies considerably. Single-step self-etching adhesives are the most susceptible to degradation after storage in water. Based on the studies analyzed it can be concluded that degradation of bonds is related to the hydrophilicity of the materials.

Keywords

Dentin bonding agents, degradation, dentin

References

 


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