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Motevasselian F, Kermanshah H, Dortaj D, Lippert F. Effect of pH of In-Office Bleaching Gels and Timing of Fluoride Gel Application on Microhardness and Surface Morphology of Enamel. Int J Dent 2023; 2023:1041889. [PMID: 37705827 PMCID: PMC10497361 DOI: 10.1155/2023/1041889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 05/16/2023] [Accepted: 08/18/2023] [Indexed: 09/15/2023] Open
Abstract
Objective To assess microhardness (VH) of enamel treated with two in-office bleaching agents with different pH and to study the effect of post- and prebleaching fluoride therapy. Materials and Methods Eighty bovine incisors were divided into eight groups: G1-Unbleached group; G2-2% NaF; G3-Pola Office (pH = 3.8); G4-Pola Office+ (pH = 7); G5-Pola Office followed by 2% NaF; G6-2% NaF followed by Pola Office; G7-Pola Office+ followed by 2% NaF; G8-2% NaF followed by Pola Office+. Bleaching was conducted 3x with 1-week intervals (T1/T7/T14). Specimens were kept in artificial saliva. VH was measured at T1, T7, and T14. Data were analyzed using repeated measure ANOVA. Surface morphology was assessed using scanning electron microscopy. Result There was no significant difference among the groups at T1. No significant difference was found between G3 and G4 at all intervals. 2% NaF (G5/G6 vs. G3) significantly prevented softening at T7 and T14. Some nonsignificant hardening was observed for 2% NaF for G7/G8 vs. G4. At T14, G3 showed the lowest VH values. G5 showed higher VH values compared to other groups apart from G6-G7. No relationship between bleaching protocols and surface morphology was observed. Conclusion Pola Office caused the most softening. 2% NaF gel application after Pola Office bleaching was effective in recovering enamel hardness. Fluoride application after Pola Office+ bleaching provided little benefit.
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Affiliation(s)
- Fariba Motevasselian
- Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Kermanshah
- Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Dorara Dortaj
- Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Frank Lippert
- Department of Cariology, Operative Dentistry and Dental Public Health, Oral Health Research Institute, Indiana University School of Dentistry, Indianapolis, IN, USA
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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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Muacevic A, Adler JR, Gaikwad A, Bajirao Jadhav A, Handa A, Bhamare R. Effect of Neodymium-Doped Yttrium Aluminum Garnet (Nd:YAG) Laser Enamel Pre-Treatment on the Whitening Efficacy of a Bleaching Agent. Cureus 2022; 14:e31325. [PMID: 36514619 PMCID: PMC9738346 DOI: 10.7759/cureus.31325] [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: 10/08/2022] [Accepted: 10/20/2022] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND There are a number of different substances and treatments that are effective in mitigating the negative effects of tooth bleaching. It is essential, however, to consider whether or not the presence of these factors affects the efficiency of the bleaching agent. AIM The purpose of this study is to determine how the pretreated enamel with a Neodymium-Doped Yttrium Aluminum Garnet (Nd:YAG) laser affects the bleaching effect of hydrogen peroxide at a concentration of 35%. METHODS AND MATERIALS Thirty samples were prepared from human-extracted permanent anterior teeth and stained using a tea solution. Based on the pre-treatment protocol, the samples were split into two equal groups (n = 15): In Group I, samples were submerged in saline solution for five minutes, while in Group II, Nd:YAG laser treatment was performed. Following pretreatment, samples from both groups were bleached with 35% hydrogen peroxide. Colour analysis of all samples was done before and after bleaching using a spectrophotometer. For the colour analysis, the CIE L*a*b* (Commission Internationale de l'Eclairage) System of colour measurement was used. For statistical analysis, Student t-tests (two-tailed, unpaired) were used to compare the means of two groups on a continuous scale. RESULTS Samples from both groups became lighter in colour following bleaching. After bleaching, there was no discernible difference in the total colour change between the two groups. CONCLUSION The application of the Nd:YAG laser before bleaching did not influence the whitening efficacy of 35% hydrogen peroxide.
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VIOLET LED DENTAL WHITENING: EFFECTIVENESS AND BIOLOGICAL SAFETY: AN IN VITRO STUDY. Photodiagnosis Photodyn Ther 2022; 39:102965. [PMID: 35732243 DOI: 10.1016/j.pdpdt.2022.102965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 06/08/2022] [Accepted: 06/10/2022] [Indexed: 11/23/2022]
Abstract
INTRODUCTION The light-emitting diode (Led) in the violet spectrum associated or not with hydrogen peroxide (HP) has been suggested as a promising technique for dental bleaching. Violet led has a wavelength of 405-410 nm, which is very close to that of ultraviolet (UV) radiation, and this has raised biological safety concerns. AIM To investigate the effectiveness of the violet led dental bleaching technique by evaluating color parameters, enamel surface microhardness, and biological safety analysis. METHODS One hundred bovine dental blocks were divided into groups according to the bleaching technique (G1 - only HP; G2 - HP associated with blue led; G3 - only blue led; G4 - HP associated with a violet led; and G5 - only violet led). The color analysis (ΔE, ΔL, and WID) and enamel surface microhardness were assessed before and after bleaching (immediately, 5, 14, and 30 days). The biological safety of the violet led irradiation was assessed by measuring the number of micronuclei formed in human cells in culture in response to irradiation. Data analysis included Kruskal-Wallis test, Friedman test, and Mann-Whitney test. RESULTS In groups G4 and G5 there was the formation of precipitates on the enamel surface. At the time of 14 days, it was observed that the G2 group had lower values of microhardness than G5. ΔL and ΔE showed differences between groups in experimental times. Mean percentages of micronuclei occurrence were similar in the control group and the violet led group. CONCLUSION The violet led irradiation can be applied for dental bleaching because this approach produces significant color changes preserving tooth enamel integrity and causes no genotoxic effects on vital cells.
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Pinelli MDM, Catelan A, de Resende LFM, Soares LES, Aguiar FHB, Liporoni PCS. Chemical composition and roughness of enamel and composite after bleaching, acidic beverages and toothbrushing. J Clin Exp Dent 2019; 11:e1175-e1180. [PMID: 31824600 PMCID: PMC6894915 DOI: 10.4317/jced.56442] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 11/04/2019] [Indexed: 11/17/2022] Open
Abstract
Background In this study was assessed the surface roughness and chemical composition of tooth enamel and composite resin after bleaching treatment, immersion in acidic beverages, and simulated toothbrushing. Material and Methods One hundred and twenty dental blocks (10 x 10 x 3 mm) were randomly assigned (n = 10) according to surface treatment [none (N), bleaching (B), toothbrushing (T), and B+T] and storage medium [saliva (S), whiskey (W), and orange juice (O)]: experimental groups - N+S, N+W, N+O, B+S, B+W, B+O, S+T, W+T, O+T, B+S+T, B+W+T, and B+O+T. Two bleaching sessions were conducted using 38% hydrogen peroxide (3 applications). Surface roughness was measured using a roughness tester and composition was determined by micro energy-dispersive X-ray fluorescence spectrometry (µ-EDXRF) before and after treatments. Calcium/phosphorus (Ca/P) ratio in enamel and silica (Si) content in composite were evaluated. Data were statistically analyzed by ANOVA and Tukey’s test (α = 0.05). Results Overall, increased values of surface roughness for enamel and composite were observed mainly after immersion in orange juice and bleaching/toothbrushing association. Moreover, this association and immersion in whiskey resulted in lower Ca/P ratio and after aging methods, bleached and bleached/toothbrushed groups showed decreased in Ca/P ratio compared to initial values. All groups showed Si content decrease at the end, except the group without surface treatment and immersed in saliva, and bleaching followed by immersion in orange juice and toothbrushing caused the highest Si reduction. Conclusions Bleaching and toothbrushing combination strengthened the effects caused by acidic drinks on roughness and chemical composition of enamel and composite. Key words:Tooth bleaching, toothbrushing, physical properties, chemical properties.
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Affiliation(s)
| | - Anderson Catelan
- Assistant Professor, Department of Dentistry, University of Taubaté, Taubaté, SP, Brazil.,Assistant Professor, Graduate Program in Dentistry, Faculty of Health Sciences, University of Western São Paulo, Presidente Prudente, SP, Brazil
| | | | - Luís-Eduardo-Silva Soares
- Assistant Professor, Laboratory of Dentistry and Applied Materials (LDAM), Research and Development Institute (IP&D), University of Vale do Paraíba, São José dos Campos, SP, Brazil
| | - Flávio-Henrique-Baggio Aguiar
- Associate Professor, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
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Fiorillo L, Laino L, De Stefano R, D'Amico C, Bocchieri S, Amoroso G, Isola G, Cervino G. Dental Whitening Gels: Strengths and Weaknesses of an Increasingly Used Method. Gels 2019; 5:gels5030035. [PMID: 31277412 PMCID: PMC6787621 DOI: 10.3390/gels5030035] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 07/01/2019] [Indexed: 02/07/2023] Open
Abstract
Many people nowadays undergo treatments to improve their aesthetics, often neglecting the general state of health. Aesthetics and appearance have become of prime importance, perhaps correlating with of the advent of social networks and digital photographs. One of the most requested aesthetic treatments for dentists is dental bleaching through the use of whitening gels. Dental bleaching is a treatment which involves an improvement in the chrome of the teeth in a short time, and this treatment appears not invasive for the patients. In-office and at-home bleaching treatments can be found. The purpose of this scientific study is to evaluate all of the advantages and disadvantages of this medical treatment. In this study, were report information and items related to bleaching side effects. Dentists often find themselves in disagreement on this topic. The PICO (Population/Intervention/Comparison/Outcome) question investigated was: Are dental patients who have dental bleaching an increased risk of teeth damage? All of the data in the literature has been collected, and all of the side effects of this treatment were evaluated. 263 studies emerged from initial research; only 14 were screened after screening, as they contained sufficient data to evaluate the side effects of treatment. One certain thing emerged; among the contraindications to the treatment of dental bleaching dentinal hypersensitivity could be cited. In fact, one of the most reported undesirable effects regards this problem. Other studies have evaluated pain, color improvement and duration, or patient satisfaction. Dental bleaching is a treatment that aims to improve the aesthetics of our patients; this is also reflected from a psychological point of view and therefore has effects on general health. However, the whitening treatment is not suitable for everyone and must be carefully evaluated by a specialist. This treatment also entails maintenance by the patient and therefore better compliance to normal oral hygiene procedures.
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Affiliation(s)
- Luca Fiorillo
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, School of Dentistry, Messina University, 98100 Messina, Italy.
- Department of Biomedical and Surgical and Biomedical Sciences, Naples University, 80100 Naples, Italy.
| | - Luigi Laino
- Department of Biomedical and Surgical and Biomedical Sciences, Naples University, 80100 Naples, Italy
| | - Rosa De Stefano
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, Messina University, 98100 Messina, Italy
| | - Cesare D'Amico
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, School of Dentistry, Messina University, 98100 Messina, Italy
| | - Salvatore Bocchieri
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, School of Dentistry, Messina University, 98100 Messina, Italy
| | - Giulia Amoroso
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, School of Dentistry, Messina University, 98100 Messina, Italy
| | - Gaetano Isola
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy
| | - Gabriele Cervino
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, School of Dentistry, Messina University, 98100 Messina, Italy
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