Naslov
Polymerization of bulk-fill composite materials with short exposure time of high light emission

Autori
Marović, Danijela ; Španović, Nika ; Par, Matej ; Crnadak, Ana ; Sekelja, Andelina ; Negovetić Mandić, Višnja ; Tarle, Zrinka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
Abstracts of the 6th International Congress of the School of Dental Medicine University of Zagreb. U. Acta stomatologica Croatica vol.54 br.2 / Klarić Sever, Eva - Zagreb, 2020, 221-221

Skup
6. međunarodni kongres Stomatološkog fakulteta Sveučilišta u Zagrebu = 6th International Congress of the School of Dental Medicine University of Zagreb

Mjesto i datum
Zagreb, Hrvatska, 28.02.2020. - 29.02.2020

Vrsta sudjelovanja
Poster

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
light-curing ; bulk-fill ; rapid-curing

Sažetak
Introduction: The composition of contemporary composite materials is changing and polymerization is shifting from classic cross-polymerization to short-chain polymerization, which opens the possibility of shortening the polymerization time with increasing light emission. The purpose of this study was to investigate the efficiency of a new generation LED curing unit with very high radiant emittance in short-time polymerization of contemporary bulk-fill composite materials. Materials and Methods: Four materials were investigated, three bulk-fills: Filtek One Bulk Fill (3M, St. Paul, USA), Tetric PowerFill (Ivoclar Vivadent, Schaan, Liechtenstein) and Tetric PowerFlow (Ivoclar Vivadent), with Tetric EvoFlow (Ivoclar Vivadent) as a reference. The materials (n=5) were polymerized for 3s with 3050 mW/cm2 (Bluephase Power- Cure, Ivoclar Vivadent). The degree of conversion (DC) was measured immediately after light curing at the surface and after 24h at surface, 1, 2, 3 and 4mm using a Raman spectrometer (Spectrum GX Perkin-Elmer, Waltham, MA, USA) with laser power 850mW and resolution 4cm-1 with 80 scans/measurement. Mean values were statistically compared using one-way ANOVA with Tukey adjustment for multiple comparisons, at an overall level of significance of 0.05. Results: All tested materials presented a significant increase in DC at the sample surface after 24h compared to DC immediately after light curing. Flowable materials achieved higher DC than sculptable. 3s curing was sufficient for adequate polymerization of Tetric PowerFlow up to 4mm (surface-70.12±2.98% and 4mm-58.23±5.87% after 24h). Tetric PowerFill at 3mm depth reached 60.80±6.74%, which was statistically similar to surface (66.66±1.21%) after 24h, but dissimilar to 4mm depth after 24h (47.77±5.26%). Filtek One demonstrated the lowest DC values at 4mm depth after 24h (29.96±6.11%). Surprisingly, the reference material Tetric EvoFlow reached very high DC values (surface- 87.86±1.21% and 4mm- 83.03±2.38% after 24h). Conclusion: Using a very high light emission for a short-time polymerization of bulk-fill composites is an innovative approach that should be used with caution for materials other than those specifically designed for such use.

Izvorni jezik
Hrvatski, engleski

Znanstvena područja
Dentalna medicina

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