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. 2010 Jan;13(1):9-15.
doi: 10.4103/0972-0707.62633.

Effect of different placement techniques on marginal microleakage of deep class-II cavities restored with two composite resin formulations

Radhika M  1 , Girija S Sajjan, Kumaraswamy B N, Neetu Mittal
Affiliations

Effect of different placement techniques on marginal microleakage of deep class-II cavities restored with two composite resin formulations

Radhika M et al. J Conserv Dent. 2010 Jan.

Abstract

Aim: The study aims to evaluate and compare marginal microleakage in deep class II cavities restored with various techniques using different composites.

Materials and methods: Sixty freshly extracted teeth were divided into six groups of 10 teeth each. Standardized class II cavities were made and were restored using composites of different consistencies with different placement techniques. Group 1 with Microhybrid composite, Group 2 with Packable composite, Group 3 Microhybrid composite with a flowable composite liner, Group 4 Packable composite with a flowable composite liner, Group 5 Microhybrid composite with precured composite insert in second increment and Group 6 Packable composite with precured insert in second increment. Specimens then were stored in distilled water, thermocycled and immersed in 50% silver nitrate solution. These specimens were sectioned and evaluated for microleakage at the occlusal and cervical walls separately using stereomicroscope.

Results: The results demonstrated that in the occlusal wall, packable composite, showed significantly more marginal microleakage than the other groups. In the cervical wall, teeth restored with a flowable composite liner showed less marginal microleakage when compared to all other groups.

Conclusion: Based on the results of this study, the use of flowable composite as the first increment is recommended in deep class II cavities.

Keywords: Class II restorations; flowable liner; marginal microleakage; precured composite insert.

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Conflict of interest statement

Conflict of Interest: None declared.

Figures

Figure 1
Figure 1
Schematic representation of the cavity preparation dimensions, at occlusal view
Figure 2
Figure 2
Schematic representation of the cavity preparation dimensions, at proximal view
Figure 3
Figure 3
Degrees of dye penetration for marginal microleakage on the occlusal wall
Figure 4
Figure 4
Degrees of dye penetration for marginal microleakage on the cervical wall
Graph 1
Graph 1
Number of teeth showing different microleakage scores in the occlusal wall
Graph 2
Graph 2
Number of teeth showing different microleakage scores in the cervical wall
See this image and copyright information in PMC

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