Estimation of the Gingival Microleakage of Two Composite Resins with Three Insertion Techniques for Class V Restorations (In-vitro Comparative Study)

Volume 6 , Issue 2 , December 2019 , Pages 15-21

Authors

Ubaydah F. AL-Gailani 1 ; Salam D. Alqaysi 2

1 Department of Conservative Dentistry, College of Dentistry, Hawler Medical University, Erbil, Iraq.

2 Department of Conservative Dentistry, College of Dentistry, University of Sulaimani, Sulaimani, Iraq.

DOI logo 10.17656/sdj.10092

Keywords

Abstract

Objective: Evaluating the marginal microleakage of two different composite resins with three different restorative techniques in class
V cavities with the cervical margins within the cementoenamel junction.
Methods: Sixty standardized box-shaped class V cavities of 2×2×3 mm (depth, length, width) prepared on the buccal and lingual
surfaces of 30 freshly extracted healthy human premolars. The teeth randomly divided into two equal groups: group A (Filtek™ Z250
XT) and group B (Beautifil™ II LS giomer). Then each group is subdivided into 3 equal subgroups: group Ⅰ (bulk technique-10
cavities), group Ⅱ ( split horizontal technique-10 cavities) and group Ⅲ (vertical technique-10 cavities) and filled according to the
manufacturer’s instructions. The samples were subjected to thermocycling (5°C ±2°C & 55°C ±2°C with a 30 seconds dwell time) and
immersed in 2% buffered Methylene blue solution at 37°C for 24 hours. The restorations were sectioned longitudinally in buccolingual
direction through the centers of the restoration. Then evaluated for microleakage using a stereomicroscope at 10x magnification and
scored as 0, 1, 2, and 3. Non-parametric Mann-Whitney and Kruskal-Wallis tests were used and p value ≤ 0.05 considred statistically
significant.
Results: Split increment horizontal layering technique showed statistically significant lower microleakage than vertical layering and
bulk technique. While giomer showed less microleakage than Z250 but statistically not significant.
Conclusions: The use of split horizontal technique and giomer composite offers better and less marginal microleakage in class V
restorations. 

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  • Published at1 December 2019

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