Post-cure depth of cure of bulk fill dental resin-composites

Alrahlah, Ali; Silikas, Nick; Watts, David C.

doi:10.1016/j.dental.2013.10.011

Cited by 217 publications

(225 citation statements)

References 32 publications

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“…As both materials are having the same monomer system, the difference can be attributed to the different filler loading between the materials. This result strongly supports the positive correlation between the filler loading and surface micro-hardness [51][52][53]55,66].…”

Section: Discussionsupporting

confidence: 82%

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Surface and bulk properties of dental resin- composites after solvent storage

2016

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Section: Discussionsupporting

confidence: 82%

“…The deterioration of the interface between the matrix and the filler system together with the hydrophilicity of the monomer system could explain the reduced DTS values after solvents storage [15,57,60]. TEC-BF demonstrated more resistance to solvent degradation, which could be related to their enhanced photoinitiation system [51,63,66].…”

Section: Discussionmentioning

confidence: 99%

Surface and bulk properties of dental resin- composites after solvent storage

2016

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“…This finding might be explained by the fact that SF, unlike other bulk-fill resin composites, is not more translucent for blue light than conventional composite materials, due to its high filler content (84 wt%, 66 vol%) and irregularly shaped particles, which increase light scattering and thus decrease light transmittance [6]. Our results are supported by Garcia et al [51] and Garoushi et al [52], but in contrast to another study [14].…”

Section: Discussionsupporting

confidence: 76%

“…High-viscosity bulk-fill resin composites, in contrast, are indicated for use without veneering, and can thus be applied as true single-step bulk-fill materials. Nevertheless, to date, very few studies concentrated on high-viscosity bulk-fill resin composites and examined their characteristics [6,[13][14][15], and only one study [16] used Fourier transform infrared spectroscopy (FTIR) to determine the DC of two representatives of nonflowable bulk-fill materials. To the knowledge of the authors, until now, there are no studies dealing with a systematic and thorough investigation on the influence of irradiation time and composite thickness on the DC of currently available high-viscosity bulk-fill resin composites.…”

Section: Introductionmentioning

confidence: 99%

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Influence of irradiation time on subsurface degree of conversion and microhardness of high-viscosity bulk-fill resin composites

et al. 2014

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OBJECTIVES To evaluate the influence of irradiation time on degree of conversion (DC) and microhardness of high-viscosity bulk-fill resin composites in depths up to 6 mm. MATERIALS AND METHODS Four bulk-fill materials (Tetric EvoCeram Bulk Fill-TECBF; x-tra fil-XF; QuixFil-QF; SonicFill-SF) and one conventional nano-hybrid resin composite (Tetric EvoCeram-TEC) were irradiated for 10, 20, or 30 s at 1,170 mW/cm(2). DC and Knoop microhardness (KHN) were recorded after 24-h dark storage at five depths: 0.1, 2, 4, 5, and 6 mm. Data were statistically analyzed using ANOVA and Bonferroni's post-hoc test ( = 0.05). RESULTS With increasing bulk thickness, DC and KHN significantly decreased for TEC. TECBF and SF showed a significant decrease in DC and KHN at 4-mm depth after 10-s irradiation, but no decrease in DC after 30-s irradiation (p > 0.05). XF and QF demonstrated no significant DC decrease at depths up to 6 mm after irradiation of at least 20 s. At 4-mm depth, all materials tested achieved at least 80 % of their maximum DC value, irrespective of irradiation time. However, at the same depth (4 mm), only XF and QF irradiated for 30 s achieved at least 80 % of their maximum KHN value. CONCLUSIONS Regarding DC, the tested bulk-fill resin composites can be safely used up to at least 4-mm incremental thickness. However, with respect to hardness, only XF and QF achieved acceptable results at 4-mm depth with 30 s of irradiation. CLINICAL RELEVANCE Minimum irradiation times stated by the manufacturers cannot be recommended for placement of highviscosity bulk-fill materials in 4-mm increments. Conclusions: Regarding DC, the tested bulk-fill resin composites can be safely used up to at least 4-mm incremental thickness. However, with respect to hardness, only XF and QF achieved acceptable results at 4-mm depth with 30 s of irradiation.Clinical relevance: Minimum irradiation times stated by the manufacturers cannot be recommended for placement of high-viscosity bulk-fill materials in 4-mm increments.

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Polymerization efficiency of bulk‐fill dental resin composites with different curing modes

Dionysopoulos

Tolidis

Gerasimou

2016

J of Applied Polymer Sci

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The aim of this study was to investigate the effect of four different curing modes on the polymerization efficiency of eight bulk‐fill composites. Five specimens for each material were prepared for Vickers hardness measurements. The measurements were performed at 0 and 2 or 4 mm from the top of the surface of the specimens 24 h after photopolymerization. Statistical analysis was performed with one‐way analysis of variance and Tukey post hoc tests at a level of significance of a = 0.05 where a is the the level of significance. The light‐curing mode affected the microhardness in all depths, but this influence was material‐dependent (pmat < 0.001), where pmat is the probability to be affected by the material. The Vickers hardness numbers of the tested composites at 0 mm ranged from 9.32 ± 0.87 to 72.58 ± 6.52 and those of the tested composites at 4 mm ranged from 5.48 ± 0.32 to 54.34 ± 2.27. The clinician has to be aware of the technical characteristics of the materials and light‐curing units (LCUs) to use the most appropriate combination of LCU, composite material, and application technique. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43392.

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Post-cure depth of cure of bulk fill dental resin-composites

Cited by 217 publications

References 32 publications

Surface and bulk properties of dental resin- composites after solvent storage

Surface and bulk properties of dental resin- composites after solvent storage

Influence of irradiation time on subsurface degree of conversion and microhardness of high-viscosity bulk-fill resin composites

Polymerization efficiency of bulk‐fill dental resin composites with different curing modes

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