Viscoelastic properties, creep behavior and degree of conversion of bulk fill composite resins

Papadogiannis, D.; Tolidis, Kosmas; Gerasimou, Paris; Lakes, R.S.; Papadogiannis, Y.

doi:10.1016/j.dental.2015.09.022

Cited by 63 publications

(48 citation statements)

References 33 publications

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“…Samples were successfully polymerized when applied in a single 2-mm thick increment (approximately DC 70%). Since the same composite material was used for all of the samples, volume filler loading and characteristics was not an influential factor, since it has been reported in the literature that different particles can affect light scattering and restrict molecular mobility 27) . This result indicates that the filler and initiator systems of the tested composite resin produce adequate degree of conversion independent of the curing mode tested.…”

Section: Discussionmentioning

confidence: 99%

“…Polymerization of dental composites is a complex process, in which many factors such as monomer composition, initiation systems, filler technologies, type of curing unit, composite filing technique, and the cavity preparations can influence the longevity of restorations [26][27][28][29] . The control of intensity of emission of curing light units has been suggested in order to minimize the effects of shrinkage stress and increase the durability of composite restorations 30) .…”

Section: Discussionmentioning

confidence: 99%

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Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs

et al. 2018

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This study evaluated the influence of different light-curing modes on the volumetric polymerization shrinkage and degree of conversion of a composite resin at different locations using micro-computed tomography and Fourier transform infrared spectroscopy (FTIR). Specimens were divided into 4 groups based on the light-curing mode used (Bluephase 20i): 1 -High (1,200 mW/cm 2 ); 2 -Low (650 mW/cm 2 ); 3 -Soft-start (650-1,200 mW/cm 2 ); and 4 -Turbo (2,000 mW/cm 2 ). Degree of conversion was calculated by the measurement of the peak absorbance height of the uncured and cured materials at the specific wavenumbers, and was performed by FTIR 48 h after curing resin samples. Degree of conversion was analyzed using two-way ANOVA. No significant differences were observed independent of the region of the restoration investigated (p>0.05). Different curing modes did not influence volumetric shrinkage neither degree of conversion of class I composite resin restorations.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs

et al. 2018

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“…The manufacturers claim that these materials exhibit low polymerization shrinkage and an increased depth of curing 5,10) . In addition, problems such as void formation and possible contamination between consecutive layers are also prevented 3,5,9) .…”

Section: Introductionmentioning

confidence: 99%

“…However, their use presents some drawbacks, such as the difficulty of curing in deep cavities due to the limited depth of light penetration 2) . The most common method to overcome this problem is incrementally layering the composite resins to ensure optimized polymerization 3,4) . In this technique, composite resins are placed in a maximum of 2-mm thick increments, in order to reduce polymerization shrinkage and minimize internal gap formation 5,6) .…”

Section: Introductionmentioning

confidence: 99%

Intrapulpal temperature changes during curing of different bulk-fill restorative materials

Yaşa¹,

Atalayın

Karaçolak

et al. 2017

Dent. Mater. J.

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The aim of this study was to evaluate the intrapulpal temperature changes during the curing of different bulk-fill restorative materials. Ten mandibular molar teeth were selected and occlusal surfaces were removed to obtain a standard 0.5 mm occlusal dentin thickness. Five bulk-fill restorative materials and a conventional resin composite (control) were applied. The intrapulpal temperature changes during the curing of these materials were determined by a device simulating pulpal blood microcirculation. The difference between the initial and maximum temperature values (Δt), was recorded. The data were statistically analyzed with one-way ANOVA and Tukey's HSD test (p<0.05). There were statistically significant differences between materials (p<0.001). The light-curing bulkfill restoratives exhibited the highest Δt values. Equia Forte showed the lowest Δt values among all the groups (p<0.05). Bulk-fill restorative materials causes significantly different temperature changes in the pulp chamber according to curing type. Therefore, clinicians should be considered when using these materials.

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“…Thus, today, several manufacturers have developed bulk-fill resin composites to expedite the restoration process by enabling increments up to 4 mm in thickness to be photo polymerized, thereby avoiding the time consuming incremental restorative process 7) . While SureFill SDR (DENTSPLY Caulk, Milford, DE, USA) was the first extensively used bulk-fill resin composite 8) , there are now several bulk-fill resin composites available 9) . Some of them are low viscosity (flowable) resin composites 10) like SureFill SDR, while others are high viscosity resin composites 11) .…”

Section: Introductionmentioning

confidence: 99%

Depth of cure, flexural properties and volumetric shrinkage of low and high viscosity bulk-fill giomers and resin composites

Tsujimoto

Barkmeier

Takamizawa

et al. 2017

Dental Materials Journal

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The purpose of this study was to investigate the depth of cure, flexural properties and volumetric shrinkage of low and high viscosity bulk-fill giomers and resin composites. Depth of cure and flexural properties were determined according to ISO 4049, and volumetric shrinkage was measured using a dilatometer. The depths of cure of giomers were significantly lower than those of resin composites, regardless of photo polymerization times. No difference in flexural strength and modulus was found among either high or low viscosity bulk fill materials. Volumetric shrinkage of low and high viscosity bulk-fill resin composites was significantly less than low and high viscosity giomers. Depth of cure of both low and high viscosity bulk-fill materials is time dependent. Flexural strength and modulus of high viscosity or low viscosity bulk-fill giomer or resin composite materials are not different for their respective category. Resin composites exhibited less polymerization shrinkage than giomers.

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Viscoelastic properties, creep behavior and degree of conversion of bulk fill composite resins

Cited by 63 publications

References 33 publications

Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs

Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs

Intrapulpal temperature changes during curing of different bulk-fill restorative materials

Depth of cure, flexural properties and volumetric shrinkage of low and high viscosity bulk-fill giomers and resin composites

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