COMPARISON OF MICROLEAKAGE AND MICROSHEAR BOND STRENGTH OF A LOW SHRINKAGE COMPOSITE VERSUS METHACRYLATE BASED HYBRID COMPOSITE- AN IN VITRO STUDY

Volume : VII, Issue : VI, June - 2018

Dr. Anupreeta. A, Dr. T. Rambabu, Dr. Girija S Sajjan, Dr. V R K R R Manikya Kumar, Dr. Ravi Kumar Konagala, Dr. Mohan Rb

Purpose of the study: was to evaluate and compare, microleakage and micro–shear bond strength of low shrinkage novel composite [Silorane

FiltekTM P90] with that of conventional hyid composite FILTEKTM Z250.

Methodology: For microleakage evaluation, standardized Class V cavities on extracted premolars were randomly assigned into 2 groups (n=10);

Gruop 1= FILTEKTM P90, Gruop 2= FILTEKTM Z250. Restored specimens were thermocycled and subjected to methylene blue dye penetration

following which, they were sectioned. microleakage was evaluated steromicroscopically and data was statistically analyzed using the Mann

whitney test. For micro–shear bond strength test, flat dentinal surface of 2 test groups(n=10) specimens were restored to create microcylinders and

were then subjected to micro–shear bond strength test at cross–head speed of 0.5 mm /min. The results were statistically analysed using Unpaired t

test.

Results: Group1 exhibited significantly decreased microleakage at cemental margin, as compared to Group 2. At enamel margin, there was no

statistical significance. In terms of overall microleakage, Silorane showed statistically significant lower values. The micro–shear bond strength of

Group1, was significantly higher, compared to Group 2.

Conclusion: Silorane composite FiltekTM P90 showed decreased microleakage and higher bond strength than FiltekTM Z250.