In vitro evaluation of microleakage for different cementation materials used in prefabricated zirconia crowns

Background: Microleakage is a significant factor that leads to the failure of full-coronal restorations. Moreover, the choice of cementation material may affect microleakage. This study aimed to evaluate microleakage in prefabricated zirconia crowns (PZCs) when cemented with different luting cements. Methods: Thirty-six freshly extracted primary maxillary incisors were prepared for PZCs. The teeth were randomly divided into three groups (n = 12) to be lutation with one of two different resin-modified glass ionomer cements (Ketac Cem Plus and FujiCEM Evolve) or a self-adhesive resin cement (RelyX U200). After the cementation process, the teeth were thermocycled 6000 times at temperatures ranging from 5 ◦C to 55 ◦C with a dwell time of 15 seconds and a transfer time of 10 seconds, immersed in basic fuchsin solution and then sectioned buccolingually. Subsequently, the sections were scored based on observations made using a stereomicroscope at 30× magnification. Statistical analysis was conducted using one-way analysis of variance and the independent two-sample t-test. The significance level was set at p < 0.05. Results: The lowest microleakage score was attained by the self-adhesive resin cement group (mean 1.00). No statistically significant differences were found among the groups (p = 0.467). Moreover, no statistically significant difference was observed between the microleakage scores for the primary central and lateral teeth, regardless of the cementation material used (p = 0.314). Conclusions: According to the outcomes of this study, self-adhesive resin cements may be a promising alternative to resin-modified glass ionomer cements.

Cementation; Crown; Dental cements; Microleakage; Primary teeth; Zirconia

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