Submitted: 23 Feb 2020
Accepted: 23 Feb 2020
ePublished: 23 Feb 2020
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J Iran Dent Assoc. 2019;31(3): 146-153.
  Abstract View: 23

Original

Effect of Finishing and Polishing Time, Technique and Surface Coating on Microleakage of Encapsulated Restorative Resin Modified Glass Ionomer: An In Vitro Study

Fariba Ezoji, Ghazaleh Ahmadi Zenouz, Adeleh Yousefi*, Soraya Khafri
*Corresponding Author: Email: ad_yousefi@yahoo.com

Abstract

Background and Aim: This study aimed to assess the effect of finishing and polishing time, technique and surface coating on microleakage of encapsulated restorative resin modified glass ionomer (RMGI).
Materials and Methods: In this in vitro study, 40 freshly extracted human premolars were selected. Two standard class V cavities were prepared on the buccal and lingual surfaces of each tooth. The prepared teeth were randomly assigned to eight experimental groups (n=10) according to the finishing and polishing time, technique and surface coating. The samples were blindly examined for marginal microleakage using a stereomicroscope at x40 magnification. The Mann-Whitney U test was used to analyze the obtained data with the level of significance set at P<0.05.
Results: Groups with surface coating showed significantly lower microleakage than uncoated samples (P<0.001). The groups in which discs were used had lower microleakage (P<0.001). There were no statistically significant differences between the groups with delayed or immediate finishing and polishing (P>0.05). Our results showed that there were no statistically significant differences between enamel and dentinal walls with regard to marginal microleakage scores (P>0.05).
Conclusion: Immediate finishing and polishing of coated restorations with Sof-Lex discs decreases their marginal microleakage. Also, it is more effective at the gingival margin.
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