Background: Till date no restorative material has the ability to completely bond to the tooth structure without forming marginal gaps. This article describes about different restorative technique in placing composite to reduce polymerization shrinkage.

Aims and objectives: : The aim of this study was to compare microleakage of class V cavities restored with two different techniques using dye penetration method. To know about better technique in placing composites that can increase the longevity of restoration by minimizing polymerization shrinkage.

Materials and methods : Thirty extracted human premolars were selected and Class V cavity was prepared and randomly divided into two groups [Group A- Snowplow technique and Group B- Control group]. Composite restoration was done using two different techniques.  All the samples were thermocycled and subjected to cyclic loading. Nail polish varnish was applied and were immersed in dye for 24 hours and were sectioned buccolingually into two halves. The sectioned teeth were examined under stereomicroscope and depth of dye penetration was analysed according scoring system. Statistical analysis using Statistical Package for Social Science (SPSS) software was done.

Results: No statistical difference was found in the microleakage Scores between Group A and Group B and between the two techniques followed for restoration. 

Conclusion: Placement of thin layer of Flowable composite under main bulk fill composite class V cavities did not decrease the microleakage rate resulting in decreased longevity of restorations. 

Keywords: Snow plow technique, Flowable composites, Microleakage, Class V restoration