Bonding of Simplified Adhesive Systems to Caries-affected Dentin of Primary Teeth

Author(s)

Teixeira Alves, Fabiana Bucholdz ^[1] ; Lenzi, Tathiane Larissa ^[2] ; Reis, Alessandra ^[3] ; Loguercio, Alessandro D. ^[3] ; Carvalho, Thiago Saads ^[2] ; Raggio, Daniela Procida ^[2]

Affiliation

^[1] Univ Estadual Ponta Grossa, Dept Pediat Dent, Ponta Grossa - Brazil

^[2] Univ Sao Paulo, Dept Pediat Dent, Sch Dent, BR-05508000 Sao Paulo - Brazil

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

• Document type: Journal article
• Source: Journal of Adhesive Dentistry; v. 15, n. 5, p. 439-445, 2013.
• Web of Science Citations: 12

Abstract

Purpose: To evaluate the bonding of simplified adhesive systems to sound and caries-affected dentin of primary teeth with microtensile (mu TBS) and nanoleakage (NL) tests. Materials and Methods: Occlusal cavities were prepared in 36 sound second primary molars. Half of the specimens were submitted to pH cycling to simulate caries-affected dentin. Teeth were randomly restored with one of three materials: the etch-and-rinse adhesive system Adper Single Bond 2 (SB), the two-step self-etching adhesive system Adper SE Plus (SE), and the one-step self-etching adhesive system Adper Easy One (EASY). After storage for 24 h, specimens with cross-sectional areas of 0.8 mm(2) were prepared for microtensile testing (1 mm/min). One stick from each tooth was immersed in silver nitrate solution (24 h) and allowed to develop for 8 h in order to score the nanoleakage with SEM. The fracture pattern was evaluated using a stereomicroscope (400X). The mu TBS means were analyzed by two-way ANOVA and Tukey's post-hoc test. For NL, the Kruskal-Wallis and Mann-Whitney tests were used (alpha < 0.05). Results: SB (35.5 +/- 3.5) showed the highest mu TBS value to sound dentin, followed by EASY (26.3 +/- 1.9) and SE (18.2 +/- 6.5) (p < 0.05). No difference among materials was observed for caries-affected dentin (SB: 17.8 +/- 4.2; SE: 13.9 +/- 3.2; EASY: 14.4 +/- 4.2, p > 0.05). For all groups, adhesive/mixed fracture prevailed. Caries-affected dentin promoted silver nitrate uptake into the adhesive interface; however, with SE, the nanoleakage was more pronounced than in the other adhesive systems, even in sound dentin. Conclusion: Caries-affected dentin negatively influences the bond strength and nanoleakage of the two-step etch-and-rinse and one-step self-etching adhesive systems tested in primary teeth. (AU)

• FAPESP's process: 09/16597-0 - Substrate condition and application protocol effect of adhesive systems in primary dentin bond strength
• Grantee: Tathiane Larissa Lenzi
• Support Opportunities: Scholarships in Brazil - Doctorate