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Pinheiro ACP, Aires OV, Gasperini MRC, Lima LCD, Shimokawa CAK, Turbino ML. The effect of tooth bleaching using violet LED (405-410 nm) on the properties of resin-based composites. Photodiagnosis Photodyn Ther 2023; 44:103883. [PMID: 37944626 DOI: 10.1016/j.pdpdt.2023.103883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/30/2023] [Accepted: 11/03/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND The objective of this study was to evaluate the effect of bleaching techniques, including or not the use of violet light (405-410 nm), on resin-based composites' color, surface roughness, nanohardness, and elastic modulus. METHODS Ninety-six disk-shaped specimens (12 mm x 2 mm; n = 12) were prepared using Filtek Z350 XT (Z350) and IPS Empress Direct (ED) resin-based composites. After 24 h, specimens were stained in red wine for 28 days. After staining, specimens were divided into four experimental groups: 40 % Hydrogen Peroxide (HP); Violet Light (VL); 40 % Hydrogen Peroxide associated with Violet Light (HP+VL), and a control group - no treatment (NT). Specimens were evaluated at six experimental times: initial (24 h after light curing); after staining and after the 1st, 2nd, 3rd, and 4th bleaching sessions regarding the color change (ΔE00, L*, a*, b*, and WID); roughness (Ra), nanohardness and elastic modulus (GPa). Two-way analysis of variance for repeated measures was performed (α=0.05 %). RESULTS There was a statistically significant difference between staining and the 1st bleaching session for all ED groups (p<0.05). After the last bleaching session, there were no differences between the experimental and the control groups of both resin-based composites. Bleaching using violet light did not change the roughness, nanohardness and elastic modulus of the tested resin-based composites (p>0.05). CONCLUSIONS Although hydrogen peroxide and violet light remove pigments from resin-based composites without affecting their surface roughness, nanohardness, and elastic modulus, the color change was similar to the one obtained by immersion in distilled water.
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Affiliation(s)
- Amanda Cavalcante Pereira Pinheiro
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
| | - Olívia Vieira Aires
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
| | - Mariana Rossi Carneiro Gasperini
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
| | - Leonardo Custódio de Lima
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
| | - Carlos Alberto Kenji Shimokawa
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil.
| | - Míriam Lacalle Turbino
- Department of Restorative Dentistry, University of São Paulo, School of Dentistry, Av. Prof. Lineu Prestes 2227, São Paulo, SP, 05508-000, Brazil
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Coppola G, Teodosio LM, Assis HC, Bertolini GR, Castro-Vasconcelos GA, Sousa-Neto MD, Lopes-Olhê FC. Chemical, morphological and microhardness analysis of coronary dentin submitted to internal bleaching with hydrogen peroxide and violet LED. Photodiagnosis Photodyn Ther 2023; 44:103862. [PMID: 37890812 DOI: 10.1016/j.pdpdt.2023.103862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 10/29/2023]
Abstract
BACKGROUND Violet LED has been used for internal bleaching, however its implications on coronary dentin composition are unclear. The present study aims to evaluate the effect of bleaching with violet LED, either associated with 35 % hydrogen peroxide or not, on microhardness, chemical composition, and morphological characteristics of coronal dentin. METHODS Thirty maxillary canines were selected to obtain 30 blocks of coronal dentin, distributed in 3 groups (n = 10): 35 % hydrogen peroxide (HP); violet LED (LED); HP 35 % + LED, (HP+LED). The chemical analysis was performed by FTIR and the morphological evaluation of the dentin structure by confocal laser scanning microscopy before (T0) and after treatment (T1). The microhardness analysis was performed by microdurometer after bleaching. The data were submitted to repeated measures ANOVA test (P> 0.05). RESULTS The intensity of the inorganic peaks decreased after bleaching for all groups (P = 0.003). There was an increase in the organic peak intensity after bleaching with HP, a decrease for LED, while HP+LED did not change the intensity (P = 0.044). Moreover, the inorganic/organic ratio decreased for HP (P = 0.022), while for LED and HP+LED there was no significant changes (P>0.05). HP and HP+LED showed lower microhardness values compared to LED (P< 0.05). Regarding morphological changes, an increase in the perimeter of the dentinal tubules was found for all groups, with the smallest increase being observed for LED. CONCLUSION HP bleaching decreased the chemical stability and microhardness of the coronal dentin, while the violet LED treatments had no significant impact on dentin stability. In all groups, there was an increase in exposure of the dentinal tubules after bleaching, which was less pronounced with the violet LED bleaching.
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Affiliation(s)
- Gabriel Coppola
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Rua Célia de Oliveira Meirelles 350, University of São Paulo, Ribeirão Preto, SP 14024-070, Brazil
| | - Leonardo Moreira Teodosio
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Rua Célia de Oliveira Meirelles 350, University of São Paulo, Ribeirão Preto, SP 14024-070, Brazil
| | - Helena Cristina Assis
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Rua Célia de Oliveira Meirelles 350, University of São Paulo, Ribeirão Preto, SP 14024-070, Brazil
| | - Gunther Ricardo Bertolini
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Rua Célia de Oliveira Meirelles 350, University of São Paulo, Ribeirão Preto, SP 14024-070, Brazil
| | - Gustavo Alexandre Castro-Vasconcelos
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Rua Célia de Oliveira Meirelles 350, University of São Paulo, Ribeirão Preto, SP 14024-070, Brazil
| | - Manoel D Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Rua Célia de Oliveira Meirelles 350, University of São Paulo, Ribeirão Preto, SP 14024-070, Brazil
| | - Fabiane Carneiro Lopes-Olhê
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, Rua Célia de Oliveira Meirelles 350, University of São Paulo, Ribeirão Preto, SP 14024-070, Brazil.
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Marques JV, Carlos NR, Turssi CP, França FMG, Vieira Junior WF, Basting RT. Effectiveness of changing the color of darker teeth is potentiated by association with violet LED light. Photodiagnosis Photodyn Ther 2023; 44:103794. [PMID: 37699468 DOI: 10.1016/j.pdpdt.2023.103794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/17/2023] [Accepted: 09/07/2023] [Indexed: 09/14/2023]
Abstract
BACKGROUND The effectiveness of in-office bleaching protocols performed with violet LED light either combined with a bleaching agent containing 37% carbamide peroxide, or not, was determined by comparing teeth with different degrees of darkening. METHODOLOGY Eighty bovine incisors were separated into groups of "light" teeth (luminosity greater than or equal to B3) and "dark" teeth (less than or equal to A3.5) to receive the protocols: HP - 35% hydrogen peroxide (Whiteness HP), CP - 37% carbamide peroxide (Whiteness SuperEndo), LED - violet LED light (Bright Max Whitening), CPLED - CP associated with the LED. For color analysis the CIEL*a*b* e WID, ΔEab, ΔE00 e ΔWID parameters were used. Data were analyzed using Mann-Whitney, Kruskal-Wallis, Dunn, Friedman or Nemenyi tests (α = 5%). RESULTS HP and CP resulted in similar color change values (ΔEab, ΔE00 e ΔWID) for light and dark teeth (p > 0.05). Dark teeth showed better bleaching effectiveness (ΔEab, ΔE00 e ΔWID) than light teeth when CPLED was used (p < 0.05). LED showed color change that were below the limits of acceptability and perceptibility for ΔWID. CONCLUSION light teeth are effectively bleached with the use of HP or CP, whereas dark teeth respond better to treatment with the CPLED protocol. Violet LED used alone did not show a satisfactory result.
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Affiliation(s)
- Joana Vasconcellos Marques
- Faculdade São Leopoldo Mandic, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil
| | - Natália Russo Carlos
- Faculdade São Leopoldo Mandic, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil
| | - Cecilia Pedroso Turssi
- Faculdade São Leopoldo Mandic, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil
| | | | | | - Roberta Tarkany Basting
- Faculdade São Leopoldo Mandic, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, CEP: 13045-755, São Paulo, Brazil.
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Palandi SDS, Kury M, Cavalli V. Influence of violet LED and fluoride-containing carbamide peroxide bleaching gels on early-stage eroded/abraded teeth. Photodiagnosis Photodyn Ther 2023; 42:103568. [PMID: 37059164 DOI: 10.1016/j.pdpdt.2023.103568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/26/2023] [Accepted: 04/11/2023] [Indexed: 04/16/2023]
Abstract
PURPOSE This study evaluated enamel with early-stage erosion/abrasion following bleaching with 20% and 45% carbamide peroxide (CP) gels containing fluoride (F) and irradiated with violet LED (LED). METHODS Enamel blocks were immersed in 1% citric acid (5 min) and artificial saliva (120 min) three times to produce early-stage enamel erosion. Simulated toothbrushing was performed only after the first saliva immersion, to provoke enamel abrasion. The erosive/abraded enamel samples were submitted to (n=10): LED/CP20, CP20, LED/CP20_F, CP20_F, LED/CP45, CP45, LED/CP45_F, CP45_F, LED, and control (without treatment). The pH of the gels was assessed, and color (ΔE00) and whiteness index (ΔWID) changes were calculated after cycling (T1), and 7 days from bleaching (T2). Enamel surface roughness average (Ra) and Knoop microhardness (kg/mm2, %SHR) were evaluated at baseline (T0) at T1 and T2. Scanning electron microscopy evaluated the enamel surface morphology at T2. RESULTS The gels' pH was neutral and CP20 and CP45 exhibited no differences in ΔE00 and ΔWID (p>0.05) but LED increased these parameters for CP20_F and CP45. Erosion/abrasion significantly decreased mean kg/mm2, and the LED group was the only one not increasing microhardness after bleaching (p>0.05). None of the groups fully recovered the initial microhardness. All groups exhibited %SHR similar to the control (p>0.05) and the increase in Ra was detected only after erosion/abrasion. CP20_F groups exhibited a more preserved enamel morphology. CONCLUSION Light irradiation combined with low-concentrated CP gel promoted a bleaching effect comparable to the high-concentrated CP. The bleaching protocols did not adversely impact the surface of early-stage eroded/abraded enamel.
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Affiliation(s)
- Samuel da Silva Palandi
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
| | - Matheus Kury
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
| | - Vanessa Cavalli
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
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de Almeida ENM, Silva AM, Besegato JF, de Sousa Gomes Costa JL, Manzoli TM, de Andrade MF, Kuga MC. Effectiveness and color stability of non-vital dental bleaching photoactivated by violet LED on blood-stained teeth. Photodiagnosis Photodyn Ther 2023; 42:103329. [PMID: 36758735 DOI: 10.1016/j.pdpdt.2023.103329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/10/2023]
Abstract
BACKGROUND Few studies have investigated the effect of violet LED irradiation associated or not with bleaching agents on blood-stained teeth. This in vitro study aimed to evaluate the whitening efficacy and color stability of non-vital dental bleaching using 35% hydrogen peroxide (HP) photoactivated with violet LED (VL) compared to 35% HP alone and 35% HP photoactivated with blue LED (BL). METHODS Fifty bovine dental crowns were used to obtain specimens of 5 × 5 × 2 mm. After selection based on a previous colorimetric analysis, the specimens were blood-stained and randomly assigned into five groups (n = 10): control (no treatment); 35% HP, 35% HP/BL; 35% HP/VL; and VL. Three bleaching sessions were performed and the colorimetric analysis (∆Eab, ∆L, and ∆WID) was recorded after 7 days, 30 days, and 9 months of the last bleaching session. Two-way repeated measures ANOVA followed by Bonferroni post-hoc test was used at a significance level of 5%. RESULTS 35% HP, 35% HP/BL, and 35% HP/VL showed higher values of ∆Eab, ∆L, e ∆WID (P < 0.05), without intra- and intergroup differences (P > 0.05). C and VL were similar in all the evaluation times (P > 0.05), showing lower values of ∆Eab, ∆L, and ∆WID (P < 0.05). CONCLUSIONS 35% HP/VL can be a viable alternative for dental bleaching in endodontically-treated teeth, showing bleaching efficacy similar to 35% HP solely used, even after a 9-month follow-up. VL used alone was not effective to bleach blood-stained teeth.
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Affiliation(s)
- Eran Nair Mesquita de Almeida
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Aryvelto Miranda Silva
- Department of Dentistry, Federal University of Juiz de Fora (UFJF), Campus Governador Valadares, Governador Valadares, MG, Brazil
| | - João Felipe Besegato
- School of Dentistry, Federal University of Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil
| | | | - Tatiane Miranda Manzoli
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Marcelo Ferrarezi de Andrade
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, SP, Brazil
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Clemente CF, de Alcântara S, da Silva LMAV, Esteves LMB, Catelan A, Aidar KMS, Fagundes TC, Briso ALF. Direct dentin bleaching: Would it be possible? Photodiagnosis Photodyn Ther 2022; 40:103121. [PMID: 36126830 DOI: 10.1016/j.pdpdt.2022.103121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/08/2022] [Accepted: 09/13/2022] [Indexed: 12/14/2022]
Abstract
This study aims to evaluate in vitro the effect of violet LED when applied directly to dentin tissue pigmented by different substances. We analyzed the chromatic alteration, the bleaching effect and the temperature variation. Hence, 60 bovine dentin tissue discs were divided into five groups: NNatural Pigmentation; T-Black Tea; C-Soluble Coffee; W-Red Wine; B-Equine Blood. Individualized pigmentation protocols were performed and all groups reached the same chromatic change value. Subsequently, we simultaneously performed a bleaching session and measured temperature variation using a K-type thermocouple device. Data on chromatic change (∆E, ∆E00, ∆a, ∆b and ∆L), whitening effect (WID) and temperature variation were subjected to one-way Anova and Tukey's post-test at a 5% significance level. The C group showed the most relevant chromatic change values, similar to the N group, responding positively to the treatment. However, the B group differed from the control group, which showed difficulty to respond to the treatment. Regarding the whitening index, only the W group showed lower results than the others. The B group showed the greatest temperature changes. We conclude that the violet LED offered chromatic change, which generated a bleaching effect. Pigmentations with red wine and blood showed the greatest difficulty to respond to treatment, also promoting a higher temperature rise in teeth pigmented with blood.
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Affiliation(s)
- Camila Ferro Clemente
- Undergraduate Student in Dentistry at the Faculty of Araçatuba, UNESP Faculty of Dentistry, José Bonifácio, 1193, Araçatuba, SP 16015-050, Brazil
| | - Sibele de Alcântara
- Department of Restorative Dentistry, São Paulo State University, (UNESP), School of Dentistry, José Bonifácio, 1193, Araçatuba, SP 16015-050, Brazil
| | - Lívia Maria Alves Valentim da Silva
- Department of Restorative Dentistry, São Paulo State University, (UNESP), School of Dentistry, José Bonifácio, 1193, Araçatuba, SP 16015-050, Brazil
| | - Lara Maria Bueno Esteves
- Department of Restorative Dentistry, São Paulo State University, (UNESP), School of Dentistry, José Bonifácio, 1193, Araçatuba, SP 16015-050, Brazil
| | - Anderson Catelan
- Department of Dentistry, Faculty of Health Sciences, University of Western São Paulo, José Bongiovani, 700, Presidente Prudente, SP, Brazil
| | - Karen Milaré Seiscento Aidar
- Department of Restorative Dentistry, São Paulo State University, (UNESP), School of Dentistry, José Bonifácio, 1193, Araçatuba, SP 16015-050, Brazil
| | - Ticiane Cestari Fagundes
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, 1193, Vila Mendonça, Araçatuba, SP CEP-16015-050, Brazil
| | - André Luiz Fraga Briso
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, 1193, Vila Mendonça, Araçatuba, SP CEP-16015-050, Brazil.
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