Effect of 2 years water aging on bond strength stability of adhesive systems to artificial caries-affected primary dentin

Autor(es)

Tedesco, Tamara Kerber ^[1] ; Teixeira Alves, Fabiana Bucholdz ^[2] ; Lenzi, Tathiane Larissa ^[1] ; Bissoto Calvo, Ana Flavia ^[1] ; Reis, Alessandra ^[3] ; Loguercio, Alessandro Dourado ^[3] ; Raggio, Daniela Procida

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Orthodont & Pediat Dent, Sao Paulo - Brazil

^[2] Univ Estadual Ponta Grossa, Dept Orthodont & Pediat Dent, Ponta Grossa, PR - Brazil

^[3] Univ Estadual Ponta Grossa, Dept Dent, Ponta Grossa, PR - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES; v. 54, p. 172-176, OCT 2014.
• Citações Web of Science: 3

Resumo

Purpose: To evaluate the effect of 2 years of water aging on microtensile bond strength (mu TBS) of an etch-and-rinse and a self-etch adhesive system to sound (S) and artificial caries-affected primary dentin (CAD). Methods: Occlusal cavities were prepared in 24 primary molars. Half of the specimens were submitted to a pH-cycling model to simulate artificial caries-affected dentin. Teeth were randomly restored either with two-step etch-and-rinse adhesive Adper Single Bond 2 (SB) or two-step self-etch system Adper SE Plus (SE). After 24 h of storage, the teeth were sectioned into two halves. One half was sectioned into sticks (0.8 mm(2)) to be tested immediately under mu TBS testing. The same procedure was performed in the other half after storage in distilled water for 2 years (2 y). Data were analyzed by three-way repeated measures ANOVA and Tukey tests (alpha=0.05). Results: The mu TBS values of both adhesive systems significantly decreased after 2 years aging (SB: S - 38.4%, CAD - 23.9%; SE: S - 17.1%, CAD - 15.7%) (p < 0.001). SE showed lower mu TBS values compared with SB, regardless of storage period (p < 0.001). Higher mu TBS were detected in sound dentin, regardless of adhesive (p < 0.001). Conclusion: The degradation of the resin-dentin bonds occurred after 2 years of water aging, regardless of the substrate condition or type of adhesive. However, the etch-and-rinse adhesive system is preferable due to the highest mu TBS in both periods. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 12/11846-5 - Efeito de diferentes modelos de envelhecimento na resistência de união em dentina decídua hígida e cariada
• Beneficiário: Ana Flávia Bissoto Calvo
• Modalidade de apoio: Bolsas no Brasil - Doutorado