Spectral Methods and Means of Studying the Optical Properties of Dental Materials Based on Methyl Methacrylate Resins

Maĭorov, E. E.; Shalamai, L. I.; Mendosa, E.Yu.; Lampusova, V. B.; Oksas, N. S.

doi:10.1007/s10527-022-10146-x

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…The lack of sufficient surrounding specially in large esthetic defects could decrease the potential of proper matching of Omnichroma. [30][31][32][33] In this study separate blocks of Omnichroma layered over Omnichroma blocker are used as the control. In this scenario color coordinates are measured with no effect of adjacent shades.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Color Shifting in Structural Colored Resin Composite Using Two Instrumental Methods

Alnagdy,

Sedky,

Nour

2024

Ain Shams Dental Journal

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To observe the changes that occur in the color coordinates of Omnichroma when placed adjacent to different esthetic shades versus separately. Additionally assessing the ability of two instrumental methods in detecting these changes. Materials and Methods: A total of 18 adjoined blocks (measuring 10x6x4mm) and 6 separate resin composite blocks (measuring 10x12x4) were prepared using two metal molds. The adjoined blocks classified according to the two levels of study: Nano-hybrid resin composite (body shade A1, A2 and A3) and measuring device (Clinical spectrophotometry and Cross-polarized digital photography). The separate block is Omnichroma layered over 1mm Omnichroma blocker then adhered with different shades to fabricate the adjoined block. Both blocks are then measured using two instrumental methods clinical spectrophotometry VITA Easyshade V and crosspolarized digital photography. Then ΔL, Δa and Δb were calculated to show the color change between the Omnichroma separate versus adjoined. Statistical analysis was performed by One-way ANOVA, followed by Tukey's post hoc test. Comparison between both instrumental devices was analyzed using paired t-test. Results: One-way ANOVA showed a statistically significant difference in the color coordinates of Omnichroma separate versus adjoined using both instrumental devices. Paired t-test showed a statistically significant difference in measuring ΔL with all shades, Δa with A1 shade and no statistically significant difference in measuring Δb with both instrumental devices. Conclusion: Omnichroma universal composite exhibited a pronounced red-yellow structural color when approximated to different shades. This color change was better distinguished by cross-polarized digital photography.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Color Shifting in Structural Colored Resin Composite Using Two Instrumental Methods

Alnagdy,

Sedky,

Nour

2024

Ain Shams Dental Journal

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“…According to the manufacturer's recommendations, OMNICHROMA BLOCKER can be used in combination with OMNICHROMA resin composite or other resin composites to restore carious cavities of all classes. It can also be used to mask moderate discoloration regardless of the color of the restored tooth (39) . However, the available data for this recently marketed restorative material are lacking and more laboratory studies are mandatory.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cavity Dimensions on Color Adjustment of Single-Shade versus Multi-Shade Resin Composite Restorations: An In Vitro Study

Fahim,

Abdelaziz,

Abdelwahed

2024

Egyptian Dental Journal

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Aim:To assess the effect of different cavity dimensions on the color adjustment potential of single-shade resin composite with or without blocker versus multi-shade resin composite.Materials and methods: 120 class V cavities were prepared with the following dimensions: Group 1 (G1): mesio-distally = 3 mm, occluso-gingivally = 2 mm, depth = 1.5 mm, Group 2 (G2): mesio-distally = 3 mm, occluso-gingivally = 1.5 mm, depth = 2 mm, Group 3 (G3): mesio-distally = 3 mm, occluso-gingivally = 2 mm, depth = 2 mm, Group 4 (G4): mesio-distally = 3 mm, occlusogingivally = 2 mm, and depth = 2.5 mm. Color assessment was done using VITA Easyshade® V. Three restorative materials were used: PALFIQUE OMNICHROMA BLOCKER (Tokuyama Dental Corporation, Japan) [B], PALFIQUE OMNICHROMA (Tokuyama Dental Corporation, Japan) [O], 3M™ Filtek™ Z350 XT Universal Restorative (3M ESPE Dental Products, USA) [Z]. The total color difference between the teeth and restorations was expressed by ΔE. All restorations were subjected to 10,000 thermal cycles. One way ANOVA, Bonferroni post hoc, paired t test, and Multiple ways ANOVA tests were used to analyze the results statistically.Results: G4 recorded the highest mean value, followed by G3, then G1, with the lowest mean value in G2. Regarding subgroups: subgroup "B" recorded the highest value, followed by subgroup "O", then subgroup "Z", with a significant difference between the subgroups (p=0.00). Regarding thermocycling, a significantly higher mean value was recorded after thermocycling. Conclusions:Increasing the cavity size and depth decreases the color adjustment of the restorative material.

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Studies of Medicinal Liquid-Phase Media Using a Spectrophotometer with a Wavelength Range of 200–780 nm

et al. 2023

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Spectral Methods and Means of Studying the Optical Properties of Dental Materials Based on Methyl Methacrylate Resins

Cited by 5 publications

References 2 publications

Evaluation of Color Shifting in Structural Colored Resin Composite Using Two Instrumental Methods

Evaluation of Color Shifting in Structural Colored Resin Composite Using Two Instrumental Methods

Effect of Cavity Dimensions on Color Adjustment of Single-Shade versus Multi-Shade Resin Composite Restorations: An In Vitro Study

Studies of Medicinal Liquid-Phase Media Using a Spectrophotometer with a Wavelength Range of 200–780 nm

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