Microleakage after Thermocycling of Three Self-Etch Adhesives under Resin-Modified Glass-Ionomer Cement Restorations

Abstract

This study was designed to evaluate microleakage that appeared on Resin-Modified Glass-Ionomer Cement (RMGIC) restorations. Sixty class V cavities (h × w × l = 2 mm × 2 mm × 3 mm) were cut on thirty extracted third molars, which were randomly allocated to three experimental groups. All the buccal cavities were pretreated with polyacrylic acid, whereas the lingual cavities were treated with three one-step Self-Etch adhesives, respectively, Xeno III (Dentsply Detrey GmbH, Konstanz, Germany), iBond exp (Heraeus Kulzer gmbH & Co. KG, Hanau, Germany), and Adper Prompt-L-Pop (3M ESPE AG, Dental products Seefeld, Germany). All cavities were completely filled with RMGIC, teeth were thermocycled for 800 cycles, and leakage was evaluated. Results were expressed as means ± standard deviations (SDs). Microleakage scores were analysed by means of generalized linear mixed models (GLMMs) assuming an ordinal logistic link function. All results were considered to be significant at the 5% critical level (P < .05). The results showed that bonding RMGIC to dentin with a Self-Etch adhesive rather than using polyacrylic acid did not influence microleakage scores (P = .091), except for one tested Self-Etch adhesive, namely, Xeno III (P < .0001). Nevertheless, our results did not show any significant difference between the three tested Self-Etch adhesive systems. In conclusion, the pretreatment of dentin with Self-Etch adhesive system, before RMGIC filling, seems to be an alternative to the conventional Dentin Conditioner for the clinicians as suggested by our results (thermocycling) and others (microtensile tests).

The effect of IDS (immediate dentin sealing) on dentin bond strength under various thermocycling periods

“…The results of the present study demonstrated that thermal cycling negatively influenced the quality of adhesive resistance, promoting the decrease in union values when the number of thermal cycles was increased. 14 38 41 42 43 44 Qualtrough et al . reported that there was a deterioration in marginal quality at the porcelain inlay/composite resin interface as a result of thermocycling.…”

&lt;sup&gt;99m&lt;/sup&gt;Tc in the evaluation of microleakage of composite resin restorations with SonicFill&lt;sup&gt;TM&lt;/sup&gt;. An &lt;i&gt;in vitro&lt;/i&gt; experimental model

“…Storage in water is the most common artificial ageing technique, as mentioned by Amaral et al and Yuasa et al [22,23] Another widely used method is thermocycling [11,23,30]. For Geerts et al thermocycling is the only in vitro test for stimulating thermal stress in teeth [32]. Thermocycling, according Helvatjoglu-Antoniades et al, simulates the introduction of hot and cold extremes in the oral cavity and shows the relationship of the linear coefficient of thermal expansion between tooth tissues and restorative materials [6].…”

Durability of bond strength of glass-ionomers to enamel

“…Guidance on testing of adhesion to tooth structure.International Organization for Standardization, 1994) [21].…”