Colorimetric changes in composites resulting from visible-light-initiated polymerization

Seghi, Robert R.; Gritz, M.D.; Kim, J.

doi:10.1016/s0109-5641(05)80044-2

Cited by 94 publications

(104 citation statements)

References 6 publications

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“…This outcome was in commitment with a previous report. 2 As previously mentioned, after initiation of polymerization, camphorquinone would lose its yellowness. 1 Nevertheless, interesting changes occurred by the midway during polymerization.…”

Section: Discussionmentioning

confidence: 90%

“…1 It is postulated that the color of resin composites would be changed by the progression of polymerization. 2 Photoinitiator, camphorquinone, would be eventually invisible; hence the yellowness of resin composite would be diminished along with an increased blue chroma. 2,3 Even after the completion of polymerization, resin composites undergo further changes in mouth by hydrophilic volumetric changes, Hydrolysis, stains and alteration of surface smoothness.…”

Section: Introductionmentioning

confidence: 99%

“…2 Photoinitiator, camphorquinone, would be eventually invisible; hence the yellowness of resin composite would be diminished along with an increased blue chroma. 2,3 Even after the completion of polymerization, resin composites undergo further changes in mouth by hydrophilic volumetric changes, Hydrolysis, stains and alteration of surface smoothness. 1,4,5 Overly, determination of color changes may be accomplished with either visual method applying a color shade or quantitavely with a device (e.g.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Different Curing Time Regimens on Immediate Postpolymerization Color Changes of Resin Composites

Mir

Mir²

2012

The Journal of Contemporary Dental Practice

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Aim: Light curing of resin composites may considerably change the color of resin composites. The aim of this study was to evaluate the changing pattern of resin composite's color by different curing times. Results: Color of samples was clinically significant changed by increasing the curing time from 10 to 20s and from 20 to 30s for Clearfil (E = 13.86 and 14.11 respectively,) and Filtek P60 (E = 7.68 and 11.66 respectively). The 'b' component change was responsible for the most color alteration confirmed by the linear regression model (p < 0.001). Conclusion:This study revealed the contrasting pattern of resin composite's color change with the different curing times. Our findings support that light curing is accompanied by a higher attained blue chroma and diminished yellowness of resin composites.Clinical significance: A complete and proper curing of sample resin composites on buccal surface of particular tooth, as a common practice to ensure the maximize concordance composite and tooth color, is reassured according to the considerable differences of undercured and overcured in comparison to normocured composite.

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Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Different Curing Time Regimens on Immediate Postpolymerization Color Changes of Resin Composites

Mir

Mir²

2012

The Journal of Contemporary Dental Practice

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“…Moreover, colour change of resin composites on curing has been described to show characteristic variations in terms of chrome values (Seghi et al, 1990). In the current study, the intrinsic colour stability of dental resin composites curing using QTH or LED light has been evaluated.…”

Section: Discussionmentioning

confidence: 99%

“…Currently, there are no reports that compare these two systems in terms of colour changes during aging in staining media (Imirzalioglu et al, 2010;Rajkumar et al, 2011;Seghi et al, 1990). In these works it was hypothesized that both the source type and the amount of energy provided by the curing light can not only change the colour of the dental restorative materials but also its discolouration aptitude in staining beverages.…”

Section: Introductionmentioning

confidence: 99%

Influence of Curing Light Type and Staining Medium on the Discoloring Stability of Dental Restorative Composite

Syed¹,

Dharrab²,

Zafa³

et al. 2017

American Journal of Biochemistry and Biotechnology

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Discoloration kinetics of 4 commercial nano-filled resin composites polymerized with LED and QTH source types in 4 different staining media held at 37°C are investigated. Quartz Tungsten Halogen (QTH) and Light Emitting Diode (LED) were used. Dental composites color change was monitored with a digital spectrophotometer at one, two and four weeks for quantitative comparison. The kinetics and intensities of the color change in accelerated aging tests in staining media were monitored and discussed. Discoloring followed diffusive driven kinetics. The four composites polymerized with QTH light showed higher differences in color change intensities compared to LED cured ones. All the QTH cured samples have shown significant higher variations of color changes intensities compared to LED samples (p<0.05). LED cured composite showed comparatively more stable initial shade persistence than QTH cured ones, which may be explained in terms of higher level of polymerization and surface hardness reached by the LED light cure resinous composite matrix.

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Comparison of the metrics between the CIELAB and the DIN99 uniform color spaces using dental resin composite material values

Lee¹,

Powers²

2006

Color Research & Application

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Colorimetric changes in composites resulting from visible-light-initiated polymerization

Cited by 94 publications

References 6 publications

The Effect of Different Curing Time Regimens on Immediate Postpolymerization Color Changes of Resin Composites

The Effect of Different Curing Time Regimens on Immediate Postpolymerization Color Changes of Resin Composites

Influence of Curing Light Type and Staining Medium on the Discoloring Stability of Dental Restorative Composite

Comparison of the metrics between the CIELAB and the DIN99 uniform color spaces using dental resin composite material values

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