Lightness, chroma, and hue distributions in natural teeth measured by a spectrophotometer

Pustina-Krasniqi, Teuta; Shala, Kujtim; Staka, Gloria; Bicaj, Teuta; Ahmedi, Enis; Dula, Linda

doi:10.4103/1305-7456.202635

Cited by 17 publications

(23 citation statements)

References 22 publications

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“…In effect, the incisors showed greater lightness and a lesser tendency toward red and yellow, while the canines showed the greatest tendency toward red. These results are consistent with those published by Pop‐Ciutrila et al, Pustina‐Krasniqi et al, and Peña et al After 6 months of follow‐up, lightness was seen to equalize among the different teeth groups, and after 30 months all the groups showed a tendency toward diminished lightness. Throughout the study, the maxillary incisors showed a greater tendency toward green, while the canines and premolars showed a greater tendency toward yellow.…”

Section: Discussionsupporting

confidence: 92%

Bleaching efficacy of at home 16% carbamide peroxide. A long‐term clinical follow‐up study

Llena

Villanueva

Mejias

et al. 2020

J Esthet Restor Dent

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Objective: To assess the whitening efficacy of a 16% carbamide peroxidase (CP) gel after 42 months of clinical follow-up. Materials and methods:A retrospective clinical study was carried out involving 95 participants. CP 16% was applied for 90 minutes a day for 4 weeks using individualized trays. Tooth color was assessed using spectrophotometry at baseline, 1 week after the end of treatment, and every 6 months until completing 42 months of follow-up. Color parameters were compared using analysis of variance for repeated measures. The analysis by teeth groups was performed using two-way ANOVA.Results: The mean baseline L* was 81.7 ± 5.2 versus 83.6 ± 8.8 after 42 months (P<.01). L* showed a decrease of 2.3 after 30 months. The values corresponding to a* before treatment were 0.4 ± 1.1 versus −1.0 ± 1.0 after 42 months (P<.01). The initial values corresponding to b* were 23.4 ± 3.3 versus 15.8 ± 1.3 after 42 months (P<.01). Values of ΔE 00 and ΔE, at the end of the treatment were 4.6 ± 1.2 and 7.8 ± 1.8, respectively. Teeth groups remained stable after 42 months of follow-up. Conclusions:The home application of 16% CP gel for 90 minutes a day for 4 weeks using individualized trays resulted in whitening that remained stable over the 42 months of follow-up.Clinical significance: Treatment with 16% CP is an effective and safe tooth whitening procedure, and the color obtained remains stable over the long term. K E Y W O R D S home tooth whitening, carbamide peroxidase, clinical follow-up, effectiveness, color stability

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Section: Discussionsupporting

confidence: 92%

Bleaching efficacy of at home 16% carbamide peroxide. A long‐term clinical follow‐up study

Llena

Villanueva

Mejias

et al. 2020

J Esthet Restor Dent

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“…Regarding the ∆Vita 1 scores, all groups showed significant color changes after surface sealant application except Biscover group, which showed only one unit of discoloration, according to the Vita Classic Shade Guide Scale ( Table 2). The surface gloss obtained after surface polishing might be responsible for this slight color change, as light reflections might create deceiving effect on surface during the color assessment (10). However, no color change was observed for Biscover group which might be interpreted that, Biscover sealant might have prevented the unwilling reflection effect of polishing, whereas Permaseal and Optiglaze sealants could not.…”

Section: Discussionmentioning

confidence: 94%

“…The surface gloss obtained after surface polishing might be responsible for this slight color change, as light reflections might create deceiving effect on surface during the color assessment (10). However, no color change was observed for Biscover group which might be interpreted that, Biscover sealant might have prevented the unwilling reflection effect of polishing, whereas Permaseal and Optiglaze sealants could not.…”

Section: Discussionmentioning

confidence: 94%

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Colorimetric Assessment of Surface Sealants for Discoloration of a Nanofilled Resin Composite

KORKUT

2020

Clinical and Experimental Health Sciences

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Objective: This in vitro study was aimed to assess the effect of different surface sealants on discoloration of a nonofilled resin-based composite quantitatively, using a colorimeter. Methods: 40 specimens were prepared using nanofilled resin composite, Filtek Universal Restorative (A2 shade, 3M, USA). Sprecimens were polymerized from both sides, polished using polishing discs (SofLex, 3M, USA) and divided by test groups (n = 10 for each), regarding the sealant used; Permaseal (Ultradent Products, USA), Biscover LV (Bisco, USA), Optiglaze Clear (GC Corp., Japan) and control group. Samples were discolored for 144 hours in coffee solution, and color measurements were performed using colorimeter (ShadeStar, Dentsply Sirona, USA). Nominal color codes of specimens regarding Vita Classical Shade Guide, were converted to corresponding numerical values. Level of color change after sealant application (∆Vita1) and after discoloration (∆Vita2) were calculated. Shapiro Wilk and Kruskal Wallis tests were used for statistical analyses. Results: Color changes in Permaseal, Optiglaze and control groups were significant (p < 0.001) compared to Biscover, for ∆Vita1 scores. Remarkable level of darkening was observed for all groups, for ∆Vita2 scores. Permaseal revealed significantly the highest level of darkening, among all (p < 0.001), but no difference with control group. Optiglaze showed significantly lower level of darkening compared to the control group (p < 0.001), whereas no difference with Biscover (p ≥ 0.05). Biscover group showed similar level of darkening with Optiglaze and control groups (p ≥ 0.05). Conclusion: Permaseal sealant presented significantly the highest discoloration, whereas Biscover and Optiglaze sealants presented similar and lower. Colorimeter might be determined as repeatable method for measuring discoloration in vitro.

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“…3 The color and appearance of teeth are a phenomenon created by a lot of factors such as lighting conditions, translucency, opacity, light scattering, gloss, and human perception. 4 Folia Medica I 2020 I Vol. 62 I No.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Study of Color Stability of Different Types of Materials for Temporary Constructions

Doshev

Slavchev

Doshev

2020

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Introduction: A temporary construction serves as a preliminary representation of the type and appearance of a future permanent one that is tailored to the patient’s requirements. Like any prosthetic construction, it should meet the functional requirements, preserve or improve chewing and speech function. No matter how well maintained a prophylactic and functional prosthetic structure is, it will not be evaluated by the patient unless it retains and restores the existing shape, size and color of the natural teeth. Aim: To determine instrumentally to what extent different colorants change the color of temporary constructions. Materials and methods: Two materials for temporary restoration were tested – Protemp II and Protemp IV, of which a total of 100 test specimens, were fabricated. Under the equal storage conditions of room temperature and no direct access to sunlight, they were exposed to five 100-ml staining solutions: Coca-Cola, coffee (espresso), berry tea, orange juice and red wine in five separate containers. Measurements of color changes in the three areas of the tooth were performed using two spectrophotometric devices – Vita EasyShade and SpectroShade, at different time intervals – immediately before placement in the staining solution, at 1, 4, 7, and 14 days. Results: The results were analysed using the SPSS Statistical Processing Program (SPSS Inc., IBM SPSS Statistics) version 21.0. They were converted to a text file with the converter of the same program. In hypothesis testing, a standard value of p ≤ 0.05 was chosen for the level of significance that rejects the null hypothesis. Conclusion: Based on this study, the strong colouring effect of coffee and red wine on these restorations was demonstrated. We can conclude that Protemp IV material showed better color stability compared to Protemp II.

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Lightness, chroma, and hue distributions in natural teeth measured by a spectrophotometer

Cited by 17 publications

References 22 publications

Bleaching efficacy of at home 16% carbamide peroxide. A long‐term clinical follow‐up study

Bleaching efficacy of at home 16% carbamide peroxide. A long‐term clinical follow‐up study

Colorimetric Assessment of Surface Sealants for Discoloration of a Nanofilled Resin Composite

Laboratory Study of Color Stability of Different Types of Materials for Temporary Constructions

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