Microleakage Assessment of Composite Restorations in Class V Cavities by Using Different Techniques – An In Vitro Study

Background Till date no restorative material has the capability to completely bond to the tooth structure without forming marginal gaps. This article describes about different restorative techniques in placing composite to reduce polymerization shrinkage.Aims and objectives The purpose of this study was to compare and evaluate microleakage of Class V cavities restored with two different techniques using dye penetration method and to determine better technique for placing composites which can increase the longevity of restoration by minimizing polymerization shrinkage.Methods Thirty extracted human premolar teeth were selected and Class V cavities were prepared. They were then randomly divided into two groups Group A- Snow plow technique and Group B- Control group. Composite restorations were done using two different techniques. All the samples were thermocycled and subjected to cyclic loading. Nail polish varnish was applied were immersed in dye for 24 hours and were sectioned buccolingually into two halves. The sectioned samples were subjected to stereomicroscopic investigation and depth of dye penetration was analysed according to scoring system. Statistical analysis using Statistical Package for Social Science SPSS software was done.Results No statistical variance was found in the microleakage scores between Group A and Group B and between the two techniques followed for restoration. Conclusion Placement of thin film of flowable composite under main bulk fill composite in Class V cavities did not decrease the microleakage rates resulting in decreased longevity of restorations