Microbial microleakage assessment of class V cavities restored with different materials and techniques: A laboratory study
Author(s):
Abstract:
Background
The aim of this study was to compare microbial microleakage of class V cavities restored with different materials and techniques using a microbial leakage assessment method.Materials And Methods
One hundred extracted, caries‑free, human maxillary premolars were randomly divided into five groups. Group 1: Resin‑modified glass ionomer (RMGI), Group 2: Closed sandwich with flowable composite nanohybrid composite, Group 3: Nanohybrid composite, Group 4: Closed sandwich with RMGI nanohybrid composite, and Group 5: Flowable composite nanohybrid composite that were co‑cured together (snow‑plow technique). A microbial penetration method utilizing Streptococcus mutans as an indicator was tested for leakage assessment. Data were analyzed and the significance level was α =0.05.Results
The log‑rank test indicated a statistically significant difference in leakage rates among the five groups (P = 0.008). MantelCox log‑rank test indicated statistically significant differences in microleakage rates between Groups 1 and 3 (P = 0.029), between Groups 2 and 5 (P = 0.005), and between Groups 3 and 5 (P = 0.002).Conclusion
With respect to the limitations of an in vitro study, our findings suggest that adding a thin layer of flowable composite or RMGI under nanohybrid composite in class V cavities did not decrease the bacterial leakage rate, whereas use of the snow‑plow technique caused an increase in the microleakage rate.Keywords:
Language:
English
Published:
Dental Research Journal, Volume:14 Issue: 5, Sep 2017
Page:
344
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