Portal de Periódicos da CAPES

Artigo Acesso aberto Produção Nacional Revisado por pares

BIBTEX RIS

Adhesive Temperature: Effects on Adhesive Properties and Resin-Dentin Bond Strength

2011; Indiana University School of Dentistry; Volume: 36; Issue: 3 Linguagem: Inglês

10.2341/10-218l

1559-2863

Alessandro Dourado Loguércio, D Salvalaggio, AE Piva, Celso Afonso Klein-Júnior, Maria de Lourdes Rodrigues Accorinte, MM Meier, RHM Grande, Alessandra Reis,

Dental Implant Techniques and Outcomes

SUMMARY Objectives To evaluate the effect of adhesive temperature on the resin-dentin bond strength (μTBS), nanoleakage (NL), adhesive layer thickness (AL), and degree of conversion (DC) of ethanol/water- (SB) and acetone-based (PB) etch-and-rinse adhesive systems. Methods The bottles of the two adhesives were kept at each temperature (5°C, 20°C, 37°C, and 50°C) for 2 hours before application to demineralized dentin surfaces of 40 molars. Specimens were prepared for μTBS testing. Bonded sticks (0.8 mm2) were tested under tension (0.5 mm/min). Three bonded sticks from each tooth were immersed in silver nitrate and analyzed by scanning electron microscopy. The DC of the adhesives was evaluated by Fourier transformed infrared spectroscopy. Results Lower μTBS was observed for PB at 50°C. For SB, the μTBS values were similar for all temperatures. DC was higher at 50°C for PB. Higher NL and thicker AL were observed for both adhesives in the 5°C and 20°C groups compared to the 37°C and 50°C groups. The higher temperatures (37°C or 50°C) reduced the number of pores within the adhesive layer of both adhesive systems. Conclusions It could be useful to use an ethanol/water-based adhesive at 37°C or 50°C and an acetone-based adhesive at 37°C to improve adhesive performance.