Influência de tratamento dentinário com EDTA sobre a resistência de união de sistemas adesivos autocondicionantes

• Autor(a) principal: Lorenzetti, Camila Cruz
• Data de Publicação: 2019
• Outros Autores: Pereira, Marcela Caroline Da Silva, Kuga, Milton Carlos, Saad, José Roberto Cury, Campos, Edson Alves De
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/1807-2577.00719; http://hdl.handle.net/11449/183867
• topic: Dentin; adhesive; EDTA; Dentina; adesivo; EDTA

AbstractIntroductionSelf-etching adhesives have simplified adhesive technique and decreased the postoperative sensitivity. When applied on dentin, it acts on the smear layer, but it is still a challenge in the effectiveness of this removal. A substance used as a pre-treatment for the removal of the smear layer is disodium ethylenediaminetetraacetic acid (EDTA).ObjectiveTo evaluate the effects of EDTA in association with self-etching adhesive systems on micro-shear bond strength.Material and methodThe occlusal surfaces of 72 extracted human third molars were sectioned to expose a flat dentin surface. The prepared teeth were divided into: dentin without pre-treatment; dentin treated with 0.1M EDTA; dentin treated with 0.5M EDTA. Each group received treatment of 3 self-etching adhesive systems: Single Bond Universal (SBU), AdheSE (AdheSE), and Clearfil SE Bond (CSEB). The adhesive area was delimited and positioned a transparent matrix for insertion with Z250XT composite resin followed by polymerization for 40 seconds. After 24h of storage, the teeth were submitted to the micro-shear test. The data were analyzed statistically using the Two-Way ANOVA and Bonferroni tests, considering a level of significance of 5%.ResultThere was no statistically significant difference in bond strength between dentin pre-treatments (p = 0.8353), but showed a significant difference between CSEB and AdheSE adhesives (p <0.05), showing similarity between CSEB and SBU, and between SBU and AdheSE.ConclusionDentin pretreatment with EDTA solution did not affect bond strength with any of the self-etching adhesive systems used.