EVALUATION OF GINGIVAL MICROLEAKAGE IN CLASS II COMPOSITE RESTORATIONS: AN IN VITRO STUDY

1. Ognjenka Janković, Republic of Srpska, Bosnia and Herzegovina
2. Smiljana Paraš, Republic of Srpska, Bosnia and Herzegovina
3. Radmila Arbutina, Medicinski fakultet Banja Luka ::Save Mrkalja 14, Republic of Srpska, Bosnia and Herzegovina
4. Irena Kuzmanović Radman, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
5. Tijana Adamović, Medicinski fakultet Banja Luka, Republic of Srpska, Bosnia and Herzegovina
6. Valentina Veselinović, University of Banja Luka, Medical Faculty, Republic of Srpska, Bosnia and Herzegovina
7. Vladan Mirjanić, Medicinski fakultet, Odsjek Stomatologija, Univerzitet u Banja Luci, Republic of Srpska, Bosnia and Herzegovina


Introduction/aim of this study was to assess the microleakage of class II restorations with different flowable composites liners.
Materials and Methods: 4o extracted human premolars teeth with class II cavity preparation (80 cavities) were divided into four groups and filled as follows: 1. Vertise flow +micro hybrid composite Herculite; 2. Surefil SDR flow+ micro-hybrid composite Herculite 3. Tetric flow + micro-hybrid composite Herculite 4. control group micro-hybrid composite Herculite. Mesial cavities are polymerized with a classic but distal soft start technique of polymerization After that, the samples were immersed in a 0.5% AgNO3 solution and sectioned into the mesiodistal direction. Using a stereomicroscope (Nikon - Japan), with a magnification of 40x, gingival microleakage of cavities was examined. Data were analyzed using Fisher's and Student's tests.
Results: After using the conventional polymerization technique, all of three used flowable composites VF + Herculite, SDRF + Herculite, TF + Herculite were less gingival microleakage than control. This difference was statistically significant. After the application of the soft start technique of polymerization, only VF + Herculite and SDRF + Hercules showed a statistically significant reduction in gingival microleakage, while TF + Herculite showed a comparable control result, with no statistically significant difference. The soft start technique proved to be better than the conventional polymerization technique, but without a statistically significant difference.
Conclusion. Flowable composites in this study have reduced gingival microleakage and can be used as liners in the restoration of cavities of II class.

Ključne reči: Microleakage; class II restoration; flowable composite; polymerization.

Tematska oblast: SIMPOZIJUM B - Biomaterijali i nanomedicina

Datum: 27.05.2019.

Contemporary Materials 2019 - Savremeni Materijali


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