Effect of Fluoride in Phosphate Buffer Solution on Bonding to Artificially Carious Enamel

Abstract

The purpose of the present study was to evaluate the effect of fluoride on resin bonding to artificially carious enamel. Specimens from demineralized human enamel sections were prepared using two commercially available adhesives (Clearfil SE Bond, Kuraray; Single Bond, 3M) and a composite resin (Clearfil AP-X, Kuraray) according to manufacturers' instructions. They were then immersed in phosphate buffered saline solution with varied fluoride concentrations at 0, 0.1, 0.5, 1, and 10 ppm. After immersion in each solution for one, three, or seven days, microshear bond strength was measured. The bond strengths of both adhesive systems to artificially carious enamel significantly increased after immersion in fluoridephosphate buffer solution. Based on the findings obtained, we thus proposed not to remove the white enamel lesions for bonding in the clinic. They might be preserved and treated using fluoride applications.

Effect of Two Microshear Test Devices on Bond Strength and Fracture Pattern in Primary Teeth

“…The fracture analysis showed a predominance of adhesive/mixed fractures in enamel and dentin, and no difference between the testing devices, corroborating the findings of previous studies (4,18). As usually observed for µSBS tests, there were few cohesive fractures (4,7,8). This may be ascribed to the fact that the load was correctly applied, leading to more consistent results than those found for µTBS test.…”

“…More recently, the microshear bond testing (µSBS) was introduced as an alternative to the µTBS test (5). However, the studies showed a lack of standardization among researchers regarding several parameters related to this test, resulting in considerable discrepancies of bonding data on the same adhesive system in different studies (6,7) or even within the same research center (7,8).…”

“…On the other hand, for the µSBS test, few studies have attempted to evaluate and standardize the variables of this test (12,13), which can also influence the results. In the same manner, most studies that evaluated the bond strength of adhesive systems using the µSBS test were performed on permanent teeth (5)(6)(7)(8). Therefore, there is little or no information about how this test applies to primary teeth (14)(15)(16).…”

Effects of experimental pastes containing surface pre-reacted glass ionomer fillers on inhibition of enamel demineralization

“…A recent study on a S-PRG containing coating material also suggested that multiple ions release from these fillers increased the resistance of enamel against demineralization 33) . It was shown that ions released from the S-PRG filler had antibacterial and pH neutralizing effects on acidic solutions [34][35][36] . In a previous study, over 250 ppm of ionized Sr was detected from a suspension of the S-PRG fillers diluted twice with water 13) .…”