Naslov
Degree of Conversion of High-viscosity Bulk-fill Composite Resins

Autori
Tarle, Z ; Attin, T ; Marović, D ; Ristić, M ; Tauböck, T.

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

Izvornik
CED IADR Abstract Book / - , 2013

Skup
CED IADR 2013

Mjesto i datum
Firenca, Italija, 04.09.2013. - 07.09.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Degree of Conversion; Bulk-fill Composite Resins

Sažetak
Objectives: To investigate the influence of light curing duration on the degree of conversion (DC) of high-viscosity bulk-fill composites (BFC) in depths up to 6 mm. Methods: Four BFCs (Tetric EvoCeram Bulk Fill-TECb, Ivoclar Vivadent ; x-tra fil- XF, Voco ; QuixFil Posterior Restorative-QF, Dentsply DeTrey ; SonicFill-SF, Kerr/KaVo), and one nano-hybrid composite (Tetric EvoCeram-TEC, Ivoclar Vivadent) were cured for 10, 20 or 30 s with Bluephase G2 (Ivoclar Vivadent, 1170 mW/cm2). DC was recorded at 5 depths: surface, 2, 4, 5 and 6 mm (n = 5). For surface measurements, samples were polymerized in direct contact with curing unit. For measurements at particular depths, uncured overlays of appropriate thickness were placed on the sample during illumination. DC was measured after 24-h-dark-storage (37°C) by using Fourier transform infrared spectroscopy. Data were analyzed by ANOVA, Tukey and Bonferroni tests. Results: With increasing bulk thickness, DC significantly decreased for TEC. TECb and SF showed a significant decrease in DC at 4 mm in case of 10 s, but not for 30 s illumination. XF and QF demonstrated an increase in DC at subsurface depths and no significant decrease for depths up to 6 mm for all curing durations. However, this was not true for XF at 5 and 6 mm for 10 s. SF showed the highest DC up to 4 mm of all materials (76.99 ± 0.92% at 4 mm/30 s). However, at 5 and 6 mm, QF and XF yielded highest DC (QF: 74.18±1.15% at 5 mm/30 s and 74.49 ± 1.24% at 6 mm/30 s ; XF: 73.98 ± 0.57% at 5 mm/30 s and 72.27 ± 1.20% at 6 mm/30 s). Conclusion: All BFCs tested can be safely used, provided that light irradiation time of more than 10 s (≥ 1000 mW/cm2) is performed.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Dentalna medicina

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