microleakage of bulk-fill composites at two different time points

Authors

niloofar kianvash rad dept. of cosmetic and operative dentistry, dental school, semnan university of medical sciences, semnan, iran

bahar javid dept. of cosmetic and operative dentistry, faculty of dentistry, shahid sadughi university of medical sciences, yazd, iran.

narges panahandeh dental research center, research institute of dental sciences, school of dentistry, shahid beheshti university of medical sciences, tehran, iran.

amir ghasemi dept. of cosmetic and operative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran.

abstract

objectives: microleakage is the main concern in composite restorations. this study aimed to compare the microleakage of two bulk-fill and one conventional composite at two different time points. methods: class ii cavities were prepared in 60 premolar teeth and divided into six groups of 20. groups 1 and 4 were incrementally filled with grandio composite. groups 2 and 5 were filled with x-tra fil bulk-fill composite. groups 3 and 6 were filled with tetric-n-ceram bulk-fill composite in one layer. the samples were thermocycled for 5000 cycles between 25-55°c. in groups 1-3, the samples were incubated for 24 hours and then immersed in 1% methylene blue dye. groups 4-6 were incubated for three months and then immersed in dye. all samples were mesiodistally sectioned and degree of microleakage was scored under a light microscope. the data were analyzed using mann whitney and kruskal-wallis tests. results: the results showed no significant difference among groups 1-5 and 6 in terms of microleakage (p>0.05) but a significant difference was noted between groups 1 and 4 in this regard (p=0.01). the microleakage in groups 4-6 was higher than that in groups 1-3 (p=0.02). also, microleakage in gingival margins was greater than that in occlusal margins (p=0.02). conclusion: the microleakage of bulk-fill composites is comparable to that of conventional composites both at 24 hours and three months after restoration.

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Journal title:
journal of dental school, shahid beheshti university of medical sciences

جلد ۳۴، شماره ۴، صفحات ۲۲۵-۲۳۴

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