Microleakage around zirconia crown margins after ultrasonic scaling with self‐adhesive resin or resin modified glass ionomer cement

Abstract

Piezoelectric ultrasonic scaling around zirconia crowns did not impact marginal microleakage cemented with self-adhesive resin or RMGI cements.

The Effect of Ultrasonic Scaling on Microleakage Around Zirconia Crown Margins Luted With Two Resin Cements

“…This was observed also on examining the sectioned crowns, where the dye stain was more intense at the resin cement/tooth interface, which proved that group II specimens expressed higher microleakage percentage than those of group I. This was in accordance with the findings of Chang et al (28) Furthermore, when comparing the results of each group alone, there was a higher microleakage percentage after application of ultrasonic scaling especially when using the self-adhesive resin cement, though this was not significantly observed in case of self-etch adhesive resin cement group. This proves that piezoelectric ultrasonic scaling may affect and disrupt the bond formed at any restoration/tooth interface.…”

“…This was in agreement with the findings of several authors. (19,25,28) However, the values of microleakage for the self-adhesive resin cement reported in this current study, showed lower values as compared to other previous studies. (6,28) This might be due to the use of cements supplied from different companies and therefore may contribute to varying bonding to dentin.…”

“…However, several previous studies compared microleakage when using different types of cements, and reported that resin modified glass ionomer cements showed higher microleakage than resin cements. (7,19,26,28) This was attributed to the higher bond between dentin surface and the resin cement as mentioned by the authors. Furthermore, Chazine et al (10) compared the microleakage around three different all-ceramic crowns and concluded that the marginal fit and cement thickness can be considered less important than the cement bonding at the margins.…”

“…All specimens were examined under stereomicroscope (Olympus SZ-CTV, Japan) at 30x magnification for dye penetration from the external crown surface to the point where no purple dye could be seen, which was measured using an image analysis software (Analysis Starter, Soft Image System, GmbH, Germany) to assign microleakage at both buccal and lingual aspects of each section. Percentage microleakage was measured by dividing the linear distance of dye penetration in microns by the linear distance from the external margin to the axial-occlusal line angle (28) (Figures 3-6).…”

“…This was in agreement to other studies which compared a single resin cement to other types of luting cements. (6,10,11,17,26,28)…”