MARGINAL MICROLEAKAGE PROPERTIES OF ACTIVA BIOACTIVE RESTORATIVE AND NANOHYBRID COMPOSITE RESIN USING TWO DIFFERENT ADHESIVES IN NON CARIOUS CERVICAL LESIONS - AN IN VITRO STUDY.

BACKGROUND

In clinical practice, the restoration of non-carious cervical lesions is a challenge, because most of the time the cervical margin is located in cementum or dentin. This characteristic makes the cervical margin more susceptible to microleakage, causing cavosurface stains, postoperative sensitivity and also favours the incidence of carious lesions.

AIM

To compare and evaluate the microleakage in class V lesions restored with Activa Bioactive restorative and nanohybrid composite resin using two different bonding agents.

METHODOLOGY

In this study, 50 class V cavities were prepared in freshly extracted teeth. The samples were randomly divided into 5 groups (n=10), depending on the type of restorative material and bonding agent: Group 1 - Activa Bioactive (Pulpdent, USA) + No bonding, Group 2 - Activa Bioactive + Tetric N Bond (Ivoclar Vivadent, Colombia),Group 3 - Activa Bioactive + G Bond (GC Corp., Tokyo, Japan), Group 4 - Nanohybrid Composite (Ivoclar Vivadent, Colombia) + Tetric N Bond, Group 5 - Nanohybrid Composite + G Bond. The samples were restored with their respective material based on the group. After curing all the specimens were subjected to thermocycling and cyclic loading. Specimens were stained with 2% rhodamin b dye and evaluated for dye penetration.

RESULTS

Results were obtained based on Kruskal Wallis and Mann Whitney U- test.

CONCLUSION

Within the limitations of this study, none of the materials were free from microleakage. All the materials showed more microleakage at gingival margins compared to occlusal margins. Among all the groups Activa Bioactive restorative when used in combination with Tetric N Bond showed the least microleakage.