Revista de Odontologia da UNESP
https://revodontolunesp.com.br/article/doi/10.1590/1807-2577.06819
Revista de Odontologia da UNESP
Original Article

Influência do método de limpeza da zircônia na adesão da prótese após a contaminação com saliva

Influence of the zirconia cleaning method on prosthesis adhesion after saliva contamination

Katya Guerra Nassif Farah BLANC; Deyse Tavares de CARVALHO; Carlos Nelson ELIAS

http://dx.doi.org/10.1590/1807-2577.06819 Rev. odontol. UNESP, vol.48, e20190068, 2019
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Resumo

Resumo: Introdução: A contaminação das restaurações de zircônia com saliva antes da cimentação influencia na resistência da adesão face à afinidade com os íons da saliva.

Objetivo: Analisar os métodos de limpeza da zircônia na adesão à dentina após a contaminação com saliva.

Material e método: Oitenta amostras de zircônia com dimensão 4×11×3 mm foram cortadas de blocos pré-sinterizados (3Y-TZP, In-Ceram - VITA) e sinterizadas. Após a sinterização, as amostras foram jateadas com partículas de óxido de alumínio, lavadas em água destilada e divididas em dois grupos com base no tipo de cimento de adesão: RelyX U200 Clicker® (grupo R) ou Multilink N® (grupo M). As amostras foram divididas em quatro subgrupos (n=10) de acordo com os métodos de limpeza e com o tipo de cimento: RG1 e MGI (sem contaminação com saliva); RG2 e MG2 (sem contaminação e limpeza com Ivoclean®); RG3 e MG3 (com contaminação e limpeza com água); RG4 e MG4 (com contaminação e limpeza com Ivoclean®). Após a cimentação, as amostras foram armazenadas em água por 10 dias. A resistência da adesão foi determinada pelo teste de cisalhamento.

Resultado: Os resultados mostraram que a maior e a menor resistência foram do Grupo RG2 e MG2, respectivamente. Entre as amostras cimentadas com RelyXTM, somente o grupo RG4 apresentou diferença na resistência da adesão (p=0,018) em relação aos demais subgrupos. Entre os grupos cimentados com Multilink N®, não houve diferença estatística (p>0,05) na resistência.

Conclusão: Os resultados mostraram que o agente de limpeza Ivoclean® não foi efetivo na descontaminação e não influenciou na resistência ao cisalhamento.

Palavras-chave

Adesão da zicônia, contaminação com saliva, cisalhamento

Abstract

Abstract: Introduction: An important clinical factor related to the adhesion of ceramic restorations is the contamination with saliva before cementation. The zirconia has strong affinity with the ions present in the saliva which can interfere in the cementation adhesion.

Objective: to evaluate the influence of the zirconia cleaning methods on the dentin adhesion system after contamination with saliva.

Material and method: Eight zirconia samples (4x11x3 mm) were cut from pre-sintered (3Y-TZP, In-Ceram-VITA®) zirconia blocks, sintered and sandblasted with alumina particles. After sintering the samples were washed in distilled water on the ultrasound and randomly divided into two groups based on the type of adhesion cement RelyX U200 Clicker® (group R) or Multilink N® (group M). Before cementation the samples were divided into four subgroups (n = 10) according to the cleaning and cementation methods: RG1 and MGI (without contamination with saliva); RG2 and MG2 (without contamination and cleaning with Ivoclean®); RG3 and MG3 (with contamination and cleaning with H2O); RG4 and MG4 (with contamination and cleaning with Ivoclean®). After cementation, the samples were stored in water (37 °C for 10 days). The adhesion strength was determined by the shear strength test.

Result: The results showed that the highest and lowest resistance were from the RG2 and MG2 subgroups, respectively. Among the samples cemented with RelyX® only the RG4 subgroup presented a difference in adhesion resistance (p = 0.018) in relation to the other subgroups. Among the subgroups cemented with Multilink N®, there was no statistical difference (p> 0.05) in shear strength.

Conclusion: Based on the results it was possible to conclude that the commercial cleaning agent Ivoclean® was not effective in the decontamination and did not influence the shear strength.
 

Keywords

Adhesion of zirconia, contamination with saliva, shear strength

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