Author(s):
1. Branislava Petronijević, Medicinski fakultet Univerziteta u Novom Sadu, Serbia
2. Sebastijan Baloš, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
3. Aleksandra Maletin, Medicinski fakultet Univerziteta u Novom Sadu, Serbia
4. Ivan Šarčev, Medicinski fakultet Univerziteta u Novom Sadu, Serbia

Abstract:
Abstract: Background Flowable dental composite resin is low strength compared to conventional composite resin, due to a low amount of filler, necessary for achieving low viscosity and ease of handling. The aim of this study was to improve mechanical properties of flowable dental composite resin by adding small amount of nanoparticles, which would not compromise handling properties. Methods. A commercially available flowable dental composite resin material was mixed with 7 nm aftertreated hydrophobic fumed silica and cured by an UV lamp. Four sets of samples were made: control sample (unmodified), the sample containing 0.05%, 0.2% and 1% nanosilica. Microhardness of the samples were tested. One-way ANOVA followed by Tukey’s test with the significance value of p < 0.05 was performed to statistically analyze the obtained results. Results. It was found that 0.05% is the most effective nanosilica content. On the other hand, when 0.2% and 1% nanosilica content was tested, different results were obtained, some of the mechanical properties even dropped, while some were insignificantly improved. Conclusions. Low nanosilica addition proved more effective in improving mechanical properties compared to higher additions. Furthermore, handling properties are unaffected by nanosilica addition.

Key words:
micro hardness, nanoparticles, flowable composite resin

Thematic field:
SYMPOSIUM B - Biomaterials and nanomedicine

Date of abstract submission:
23.07.2018.

Conference:
Contemporary Materials 2018 - Savremeni Materijali