Shear Bond Strength of Three Composite Resins to Fluorosed and Sound Dentine: In Vitro Study

Abstract

Introduction. This in vitro study compared the shear strength of three composite resin systems to fluorosed and normal dentin. Methods. Silorane FiltekTM P90, FiltekTMZ250 XT in combination with the adhesive system AdperTM Single bond 2, and Amelogen® Plus in association with Peak Universal Bond® were tested. Fifteen normal and 15 fluorosed dentine disks were prepared per material. The shear bond strength test was performed using a universal machine. Results. One-way ANOVA revealed significant differences in bond strength between the tested composite resins. All tested materials had significantly different adhesion at the fluorosed and the nonfluorosed interface. FiltekTM Z250 XT and Silorane had lower adhesion values to fluorosed than to normal dentin. In contrast, Amelogen® Plus presented a better average resistance at the fluorosed interface. Conclusion. Amelogen® Plus presented a better average shear bond strength on the fluorosed dentine. FiltekTMZ250 XT showed the best adhesion forces and shear bond strength with sound dentine. Further studies are needed to better understand the sealing of these systems.

Effects of dimethyl sulfoxide pretreatment on the bonding properties of fluorotic dentin of different severity: An in vitro study

“…The bond strength of SE-F was consistently lower than that of ML-F, while the bond strength of MD-F was at an intermediate level, consistent with previous studies, 22,23 suggesting that dental fluorosis is a gradual change from quantitative to qualitative. 20,22,23 Dental fluorosis, Representative scanning electron microscope images (original magnification ×50 000). A-C, Exposed collagen fibrils observed within peritubular and intertubular dentin after etch-and-rinse.…”

“…Lower bond strength and long-term bonding integrity have been shown when bonding to fluorotic dentin than to sound dentin. [20][21][22][23] Therefore, the development of additional formulations or strategies to improve the bonding efficiency of fluorotic dentin would be beneficial.…”

Bonding to Fluorosed Teeth: A Review of the Literature

“…The severity of dental fluorosis seems to influence the bond strength of different resin-based materials to fluorosed teeth. Significantly higher bond strength was found when bonding resin composite to enamel with mild fluorosis when compared to moderate or severe fluorosis [ 12 , 13 , 15 ]. The bond strength of the resin composite to dentin was also found to be negatively affected by fluorosis and inversely proportional to its severity [ 16 ].…”

“…These structural alterations can negatively impact the adhesion of various dental materials to fluorosed teeth. Many studies have demonstrated a reduced bond strength of resin-based materials to teeth with fluorosis [10][11][12][13][14][15][16]. The aim of this paper is to review the available literature to identify updates in bonding to fluorosed teeth and summarize relevant recommendations.…”

Siloranes–Suitability of a Novel Adhesive for Orthodontic Bracket Bonding

“…Marginal adaption and micropermeability are controversially discussed in the existing literature, suggesting no advantage for siloranes [12,13]. Shear bond strengths tend to be lower, both to dentin [14] and enamel [15], as well as to aged methacrylate blocks simulating the repair of older restorations [16].…”