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Clinical Oral Investigations
Erschienen in: Clinical Oral Investigations 4/2017

06.07.2016 | Original Article

Curing characteristics of flowable and sculptable bulk-fill composites

verfasst von: Vesna Miletic, Pong Pongprueksa, Jan De Munck, Neil R. Brooks, Bart Van Meerbeek

Erschienen in: Clinical Oral Investigations | Ausgabe 4/2017

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Abstract

Objectives

The aim of this study was to determine and correlate the degree of conversion (DC) with Vickers hardness (VH) and translucency parameter (TP) with the depth of cure (DoC) of five bulk-fill composites.

Materials and methods

Six specimens per group, consisting of Tetric EvoCeram Bulk Fill (“TEC Bulk,” Ivoclar Vivadent), SonicFill (Kerr), SDR Smart Dentin Replacement (“SDR,” Dentsply), Xenius base (“Xenius,” StickTech; commercialized as EverX Posterior, GC), Filtek Bulk Fill flowable (“Filtek Bulk,” 3M ESPE), and Tetric EvoCeram (“TEC,” control), were prepared for DC and VH: two 2-mm-thick layers, each light-cured for 10 s; one 4-mm bulk-fill, light-cured for 10 or 20 s; and one 6-mm bulk-fill, cured for 20 s. DC was measured using a Fourier-transform infrared spectrometer, VH using a Vickers hardness tester. DoC and TP were measured using an acetone-shaking test and a spectrophotometer, respectively. Data were analyzed using ANOVA and Pearson’s correlation (α = 0.05).

Results

DC and VH ranged between 40–70 % and 30–80 VHN, respectively. TEC Bulk, Xenius, and SonicFill, bulk-filled as 4-mm-thick specimens, showed bottom-to-top hardness ratios above 80 % after 20 s curing. A positive linear correlation was found for bottom DC and VH. An average DC ratio of 0.9 corresponded to a bottom-to-top VH ratio of 0.8.

Conclusions

Sculptable bulk-fills require 20 s, whereas 10 s curing time was sufficient for flowable bulk-fills using a high-intensity LED unit.

Clinical relevance

Clinicians should be aware that longer curing times may be required for sculptable than flowable bulk-fill composites in order to achieve optimal curing characteristics.
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Metadaten
Titel
Curing characteristics of flowable and sculptable bulk-fill composites
verfasst von
Vesna Miletic
Pong Pongprueksa
Jan De Munck
Neil R. Brooks
Bart Van Meerbeek
Publikationsdatum
06.07.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
Clinical Oral Investigations / Ausgabe 4/2017
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-016-1894-0

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