Effects of potassium oxalate on knoop hardness of etch-and-rinse adhesives

Operative Dentistry
S M A SilvaM Carrilho

Abstract

The objective of this study was to determine whether the hardness of etch-and-rinse adhesives may be affected by the pretreatment of acid-etched dentin with potassium oxalate desensitizer. Unerupted human third molars were cut into crown segments by removing the occlusal enamel and roots. The pulp chamber of these crown segments was connected to a syringe barrel filled with phosphate-buffered saline so that the moisture of dentin was maintained during the bonding procedures. Three etch-and-rinse adhesives-two two-step systems (Adper Single Bond 2 [SB], One-Step [OS]) and one three-step system (Adper Scotchbond Multi-Purpose [MP])-were applied to acid-etched dentin that had been treated (experimental groups) or not (control groups) with potassium oxalate (BisBlock). The Knoop hardness (KHN) of adhesives was taken at different sites of the outer surface of the adhesive-bonded dentin. The KHN of the three tested adhesives applied to acid-etched dentin treated with potassium oxalate was significantly lower than that exhibited by the respective controls (not treated with oxalate; p<0.05). Regardless of the adhesive, the treatment with potassium oxalate reduced the adhesives' KHN (p<0.05), with the OS system exhibiting the lowest KHN...Continue Reading

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Citations

Jul 8, 2014·Dental Materials Journal·Saryta ArgoloAndrea Cavalcanti
Jul 16, 2015·Clinical Oral Investigations·Nadine Luísa Guimarães AlbuquerqueSérgio Lima Santiago
Apr 13, 2017·Microscopy Research and Technique·Isabel Cristina Celerino de Moraes PortoMarcos Antônio Japiassú Resende Montes

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