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Soliman Wadan AH, Abdelsattar Ahmed M, Hussein Ahmed A, El-Sayed Ellakwa D, Hamed Elmoghazy N, Gawish A. The Interplay of Mitochondrial Dysfunction in Oral Diseases: Recent Updates in Pathogenesis and Therapeutic Implications. Mitochondrion 2024; 78:101942. [PMID: 39111357 DOI: 10.1016/j.mito.2024.101942] [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: 04/05/2024] [Revised: 07/12/2024] [Accepted: 08/03/2024] [Indexed: 08/15/2024]
Abstract
Mitochondrial dysfunction is linked to various systemic and localized diseases, including oral diseases like periodontitis, oral cancer, and temporomandibular joint disorders. This paper explores the intricate mechanisms underlying mitochondrial dysfunction in oral pathologies, encompassing oxidative stress, inflammation, and impaired energy metabolism. Furthermore, it elucidates the bidirectional relationship between mitochondrial dysfunction and oral diseases, wherein the compromised mitochondrial function exacerbates disease progression, while oral pathologies, in turn, exacerbate mitochondrial dysfunction. Understanding these intricate interactions offers insights into novel therapeutic strategies targeting mitochondrial function for managing oral diseases. This paper pertains to the mechanisms underlying mitochondrial dysfunction, its implications in various oral pathological and inflammatory conditions, and emerging versatile treatment approaches. It reviews current therapeutic strategies to mitigate mitochondrial dysfunction, including antioxidants, mitochondrial-targeted agents, and metabolic modulators.
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Affiliation(s)
- Al-Hassan Soliman Wadan
- Faculty of Dentistry, Sinai University, Arish Branch, North Sinai, Egypt; Sinai University Research Center (SURC), Sinai University, North Sinai, Egypt.
| | - Mohamed Abdelsattar Ahmed
- Faculty of Dentistry, Sinai University, Kantra Branch, Ismailia, Egypt; Sinai University Research Center (SURC), Sinai University, North Sinai, Egypt
| | - Abdelnaser Hussein Ahmed
- Faculty of Dentistry, Sinai University, Arish Branch, North Sinai, Egypt; Sinai University Research Center (SURC), Sinai University, North Sinai, Egypt
| | - Doha El-Sayed Ellakwa
- Department of Biochemistry & Molecular Biology, Faculty of Pharmacy for Girls, Al-Azhar University, Cairo, Egypt; Department of Biochemistry, Faculty of Pharmacy, Sinai University, Kantra Branch, Ismailia, Egypt
| | - Nourhan Hamed Elmoghazy
- Faculty of Dentistry, Sinai University, Arish Branch, North Sinai, Egypt; Sinai University Research Center (SURC), Sinai University, North Sinai, Egypt
| | - Abeer Gawish
- Faculty of Dentistry, Sinai University, Arish Branch, North Sinai, Egypt; Sinai University Research Center (SURC), Sinai University, North Sinai, Egypt; Faculty of Graduate Studies, Sinai University, Arish Branche, North Sinai, Egypt; Oral Medicine, Periodontology, Diagnosis and Radiology Department, Al Azhar University, Egypt
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Xavier GMB, Gil GS, Paes YFO, de Meneses Costa Ferreira LM, Silva CM, Ribeiro-Costa RM, Araújo JLN. Assessment of the effect of experimental gel of pregabalin associated with 35% hydrogen peroxide bleaching on bovine dental enamel: an in vitro study. Odontology 2024:10.1007/s10266-024-00978-2. [PMID: 39060896 DOI: 10.1007/s10266-024-00978-2] [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: 11/28/2023] [Accepted: 07/05/2024] [Indexed: 07/28/2024]
Abstract
To assess the effect of bleaching with gel of pregabalin associated with 35% hydrogen peroxide on the mechanical and chemical properties and ultramorphology of dental enamel. Thirty-six (36) specimens of bovine dental incisors were obtained and divided into three groups (n = 12), namely: CG = bleaching with 35% hydrogen peroxide; KFG = bleaching with 5% potassium nitrate and 2% sodium fluoride gel + 35% hydrogen peroxide; and PGG = bleaching with experimental gel of pregabalin + 35% hydrogen peroxide. The specimens were assessed with respect to Knoop microhardness, surface roughness, and colour change, before and after bleaching. They were also assessed using scanning electron microscopy and energy-dispersive spectroscopy after treatments. All groups exhibited an increase in surface roughness and a reduction in Knoop microhardness after the protocols. There was colour change in all groups, with no difference between them. In addition, there were changes in enamel morphology and non-significant loss of calcium and phosphorus. The experimental gel of pregabalin did not influence the action of 35% hydrogen peroxide, yielding results similar to those of the other groups assessed in all the parameters. Therefore, the gel of pregabalin can be an alternative for topical application on the surfaces of the teeth in association with bleaching treatments.
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Affiliation(s)
- Gabriela Monteiro Barbosa Xavier
- Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Pará, Av. Augusto Corrêa, nº 01, Belém, PA, 66.075-110, Brazil
| | - Giovana Sholheid Gil
- Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Pará, Av. Augusto Corrêa, nº 01, Belém, PA, 66.075-110, Brazil
| | - Yngrid Fernanda Oliveira Paes
- Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Pará, Av. Augusto Corrêa, nº 01, Belém, PA, 66.075-110, Brazil
| | | | - Cecy Martins Silva
- Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Pará, Av. Augusto Corrêa, nº 01, Belém, PA, 66.075-110, Brazil
| | - Roseane Maria Ribeiro-Costa
- Pharmaceutical Nanotechnology Laboratory, Faculty of Pharmacy, Federal University of Pará, Av. Augusto Corrêa, nº 01, Belém, PA, 66.075-110, Brazil
| | - Jesuína Lamartine Nogueira Araújo
- Department of Restorative Dentistry, Faculty of Dentistry, Federal University of Pará, Av. Augusto Corrêa, nº 01, Belém, PA, 66.075-110, Brazil.
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Dascanio R, de Oliveira Ribeiro RA, Coelho CSS, Souza MT, Kury M, Zanotto ED, de Souza Costa CA, Cavalli V. Effectiveness and safety of biosilicate-enhanced bleaching gels on enamel with early erosion lesion. J ESTHET RESTOR DENT 2024. [PMID: 38853343 DOI: 10.1111/jerd.13271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 05/13/2024] [Accepted: 05/25/2024] [Indexed: 06/11/2024]
Abstract
AIM This study evaluated the efficacy and cytotoxicity of 35% hydrogen peroxide (HP) gel incorporated with 10% (w/w) biosilicate (BioS) on sound enamel and early-stage enamel erosion lesions. METHODS Discs of enamel/dentin were selected, subjected to erosive cycles (0.3% citric acid, pH 2.6), and treated with (n = 8): HP (35% HP, positive control); HP_BioS [carboxymethyl cellulose (CMC) + HP + BioS]; BioS (CMC + BioS); CMC (negative control). The discs were adapted to artificial pulp chambers with the enamel exposed for bleaching, and the dentin facing toward the culture medium (Dulbecco's modified Eagle's medium [DMEM]). Bleaching was performed in three 30-min sessions at 7-day intervals. After bleaching, the diffusion product (DMEM extract + diffused HP) was pipetted onto MDPC-23 odontoblastic cell line and inoculated. Color parameters (ΔL, Δa, Δb), color change (ΔE00), and changes in whiteness index (ΔWID) were determined before (T0) and after the last bleaching session (T3). Cell viability (MTT, %), H2O2 diffusion (μg/mL), oxidative cell stress (OxS), and cell fluorescence (live/dead assay, in confocal microscopy) were assessed (ANOVA/Tukey; α = 0.05). RESULTS No difference in ΔL, Δa, Δb, ΔE00, and ΔWID were found between HP and HP_BioS (p > 0.05). The incorporation of BioS decreased the HP diffusion into the substrates and mitigated oxidative stress in early-stage eroded enamel (p < 0.05). HP_BioS presented significantly higher cell viability compared with HP under erosion conditions. Live/dead assay indicated that BioS_HP maintained viability with larger clusters of viable cells. CONCLUSION Incorporating BioS into HP maintained bleaching effectiveness, favored cell viability, reduced the oxidative stress, and the cytotoxicity in teeth with early-stage erosion. CLINICAL SIGNIFICANCE BioS formulation showed promising results for reducing cytotoxicity in patients seeking tooth bleaching and presenting undetectable early-stage erosion.
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Affiliation(s)
- Rafael Dascanio
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | | | - Camila Siqueira Silva Coelho
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Marina Trevelin Souza
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos, São Carlos, Brazil
| | - Matheus Kury
- Dental Research Division, School of Dentistry, Paulista University (UNIP), São Paulo, Brazil
| | - Edgar Dutra Zanotto
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos, São Carlos, Brazil
| | | | - Vanessa Cavalli
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
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Donato MV, Dos Reis-Prado AH, Abreu LG, de Arantes LC, Goto J, Chaves HGDS, Cintra LTA, Briso ALF, Peixoto IFDC, Benetti F. Influence of dental bleaching on the pulp tissue: A systematic review of in vivo studies. Int Endod J 2024; 57:630-654. [PMID: 38470103 DOI: 10.1111/iej.14061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 01/08/2024] [Accepted: 02/23/2024] [Indexed: 03/13/2024]
Abstract
BACKGROUND Although several studies indicate the harmful effects of bleaching on pulp tissue, the demand for this procedure using high concentrations of hydrogen peroxide (HP) is high. OBJECTIVES To investigate the influence of bleaching on the pulp tissue. METHODS Electronic searches were conducted (PubMed/MEDLINE, Scopus, Cochrane Library and grey literature) until February 2021. Only in vivo studies that evaluated the effects of HP and/or carbamide peroxide (CP) bleaching gels on the inflammatory response in the pulp tissue compared with a non-bleached group were included. Risk of bias was performed according to a modified Methodological Index for Non-Randomized Studies scale for human studies and the Systematic Review Centre for Laboratory Animal Experimentation's RoB tool for animal studies. Meta-analysis was unfeasible. RESULTS Of the 1311 studies, 30 were eligible. Of these, 18 studies evaluated the inflammatory response in animal models. All these studies reported a moderate-to-strong inflammatory response in the superficial regions of pulp, characterized by cell disorganization and necrotic areas, particularly during the initial periods following exposure to 35%-38% HP, for 30-40 min. In the evaluation of human teeth across 11 studies, seven investigated inflammatory responses, with five observing significant inflammation in the pulp of bleached teeth. In terms of tertiary dentine deposition, 11 out of 12 studies noted its occurrence after bleaching with 35%-38% HP in long-term assessments. Additionally, three studies reported significant levels of osteocalcin/osteopontin at 2 or 10 days post-treatment. Other studies indicated an increase in pro-inflammatory cytokines ranging from immediately up to 10 days after bleaching. Studies using humans' teeth had a low risk of bias, whereas animal studies had a high risk of bias. DISCUSSION Despite the heterogeneity in bleaching protocols among studies, High-concentrations of HP shows the potential to induce significant pulp damage. CONCLUSIONS High-concentrations of bleaching gel increases inflammatory response and necrosis in the pulp tissue at short periods after bleaching, mainly in rat molars and in human incisors, in addition to greater hard tissue deposition over time. However, further well-described histological studies with long-term follow-up are encouraged due to the methodological limitations of these studies. REGISTRATION PROSPERO (CRD42021230937).
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Affiliation(s)
- Mariana Viana Donato
- Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | | | - Lucas Guimarães Abreu
- Child's and Adolescent's Oral Health, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Lara Cancella de Arantes
- Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Juliana Goto
- Restorative Dentistry, School of Dentistry, São Paulo State University (Unesp), Araçatuba, Brazil
| | | | | | - André Luiz Fraga Briso
- Restorative Dentistry, School of Dentistry, São Paulo State University (Unesp), Araçatuba, Brazil
| | | | - Francine Benetti
- Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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de Paula KDS, Dos Reis-Prado AH, de Jesus WP, Goto J, de Arantes LC, Verçosa M, Cintra LTA, Ervolino E, Szawka RE, Crovace MC, de Mesquita RA, Benetti F. Final irrigation with bioglass solution in regenerative endodontic procedure induces tissue formation inside the root canals, collagen maturation, proliferation cell and presence of osteocalcin. Int Endod J 2024; 57:586-600. [PMID: 38323923 DOI: 10.1111/iej.14033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 11/01/2023] [Accepted: 01/14/2024] [Indexed: 02/08/2024]
Abstract
AIM To evaluate the influence of an experimental solution of cobalt-doped F18 bioactive glass (F18Co) on tissue repair following regenerative endodontic procedure (REP) in rat molars. METHODOLOGY The F18Co solution was prepared at a ratio of 1:5 F18Co powder to distilled water. The right or left upper first molars of 12 Wistar rats were used, where the pulps were exposed, removed, and irrigated with 2.5% sodium hypochlorite (NaOCl), followed by 17% ethylenediaminetetraacetic acid (EDTA) (5 min each). Subsequently, the molars were divided into two groups (n = 6): REP-SS and REP-F18Co, where they received a final irrigation (5 min) with saline solution (SS) or F18Co solution, respectively. Then, intracanal bleeding was induced, and the tooth was sealed. Untreated molars were used as controls (n = 3). At 21 days, the rats were euthanized, and the specimens were processed for analysis of mineralized tissue and soft tissue formation inside the root canal using haematoxylin-eosin. The presence and maturation of collagen were evaluated by Masson's trichrome and picrosirius red staining. Immunolabelling analyses of proliferating cell nuclear antigen (PCNA) and osteocalcin (OCN) were performed. The data were submitted to the Mann-Whitney U-test (p < .05). RESULTS There was a similar formation of mineralized tissue in thickness and length in REP-SS and REP-F18Co groups (p > .05). Regarding the presence of newly formed soft tissue, most specimens of the REP-F18Co had tissue formation up to the cervical third of the canal, whilst the REP-SS specimens showed formation up to the middle third (p < .05), and there was higher maturation of collagen in REP-F18Co (p < .05). The number of PCNA-positive cells found in the apical third of the root canal was significantly higher in the F18Co group, as well as the OCN immunolabelling, which was severe in most specimens of REP-F18Co, and low in most specimens of REP-SS. CONCLUSION The final irrigation with F18Co bioactive glass solution in REP did not influence mineralized tissue formation but induced soft tissue formation inside the root canals, with higher collagen maturation, and an increase in PCNA-positive cells and OCN immunolabelling.
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Affiliation(s)
- Kiani Dos Santos de Paula
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte-MG, Brazil
| | | | - Witalo Pereira de Jesus
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte-MG, Brazil
| | - Juliana Goto
- Department of Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba-SP, Brazil
| | - Lara Cancella de Arantes
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte-MG, Brazil
| | - Marina Verçosa
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte-MG, Brazil
| | | | - Edilson Ervolino
- Department of Basic Science, São Paulo State University (UNESP), School of Dentistry, Araçatuba-SP, Brazil
| | - Raphael Escorsim Szawka
- Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte-MG, Brazil
| | - Murilo Camuri Crovace
- Department of Materials Engineering, State University of São Carlos (UFSCar), Bioactive Materials Laboratory (LMBio), São Carlos-SP, Brazil
| | - Ricardo Alves de Mesquita
- Oral Pathology and Surgery, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte-MG, Brazil
| | - Francine Benetti
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte-MG, Brazil
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Alcântara SD, Benetti F, Silva LMAVD, Machado NEDS, Silva IJP, Esteves LMB, Ervolino E, Cintra LTA, Briso ALF. Bleaching gel volume influences hydrogen peroxide diffusion, inflammation, and the presence of nitric oxide in the pulp tissue: in vitro and in vivo model. J Appl Oral Sci 2023; 31:e20230265. [PMID: 38126578 PMCID: PMC10786454 DOI: 10.1590/1678-7757-2023-0265] [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: 07/31/2023] [Revised: 10/24/2023] [Accepted: 11/06/2023] [Indexed: 12/23/2023] Open
Abstract
OBJECTIVE To assess whether bleaching gel volume influences chromatic changes, hydrogen peroxide (HP) diffusion, inflammation, and oxidative stress in the pulp tissue. METHODOLOGY A total of 60 bovine teeth were divided into four groups, according to bleaching gel volume (n=15): without gel (WG); V30 (30 µL of 35% HP); V60 (60 µL); and V120 (120 μL). HP diffusion analysis was performed in the first session (T1). Chromatic changes (ΔE, ΔE00, and WID) were assessed after the first (T1), second (T2), third (T3) sessions, and 15 d (T4) after the end of treatment. Moreover, 20 rats were randomly divided into four groups (n=10) and their upper first molars were treated with different gel volumes: control (no treatment); V2 (2 μL of 17.5% HP); V4 (4 μL); and V8 (8 μL). After 24 h, rats were euthanized and the specimens processed for histological and immunohistochemical (nitric oxide synthase) evaluation. Data were analyzed using the Wilcoxon and Mann-Whitney tests (p<0.05). RESULTS In vitro (bovine teeth), chromatic changes were not influenced by bleaching gel volume, showing similar values in all groups and sessions, except for the control group (p<0.05). The V120 group had the highest HP diffusion values (p<0.05). In vivo (pulp tissue), the V4 and V8 groups showed the highest inflammatory infiltrate in the pulp and significant oxidative stress (p<0.05). CONCLUSION The adverse effects on the dental pulp related to HP diffusion, pulp inflammation, and oxidative stress depend on bleaching gel volume, while the bleaching effect is not proportional to the volume used.
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Affiliation(s)
- Sibele de Alcântara
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brasil
| | - Francine Benetti
- Universidade Federal de Minas Gerais, Faculdade de Odontologia, Departamento de Odontologia Restauradora, Belo Horizonte, MG, Brasil
| | - Lívia Maria Alves Valentim da Silva
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brasil
| | - Nathália Evelyn da Silva Machado
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brasil
| | - Isabela Joane Prado Silva
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brasil
| | - Lara Maria Bueno Esteves
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brasil
| | - Edilson Ervolino
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, SP, Brasil
| | - Luciano Tavares Angelo Cintra
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brasil
| | - André Luiz Fraga Briso
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brasil
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Gruba AS, Nunes GP, Marques MT, Danelon M, Alves RDO, de Toledo PTA, Briso ALF, Delbem ACB. Influence of bleaching gels formulated with nano-sized sodium trimetaphosphate and fluoride on the physicochemical, mechanical, and morphological properties of dental enamel. J Dent 2023; 139:104743. [PMID: 37839624 DOI: 10.1016/j.jdent.2023.104743] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 10/02/2023] [Accepted: 10/12/2023] [Indexed: 10/17/2023] Open
Abstract
OBJECTIVES To evaluate in vitro the effects of sodium fluoride (F) and nano-sized sodium trimetaphosphate (TMPnano) added to a 35% hydrogen peroxide (H2O2) bleaching gel on the color alteration, enamel mechanical and morphological properties, and H2O2 transamelodentinal diffusion. MATERIALS AND METHODS Bovine enamel/dentin discs (n = 180) were divided according to the bleaching gel: 35% H2O2 (HP); 35% H2O2 + 0.1% F (HP/F); 35% H2O2 + 1% TMPnano (HP/TMPnano); 35% H2O2 + 0.1% F + 1% TMPnano (HP/F/TMPnano) and 35% H2O2 + 2% calcium gluconate (HP/Ca). The gels were applied 3 times by 40 min; once each 7-day. The Commission Internationale de l'Eclairage (CIE) L*a*b* total color alteration (ΔE), color alteration by CIEDE2000 (ΔE00), whitening index (ΔWID), surface (SH) and cross-sectional hardness (ΔKHN), surface roughness (Ra), and transamelodentinal diffusion were determined. Enamel surfaces were evaluated by Scanning Electron Microscopy (SEM) and X-ray Dispersive Energy (EDX). Data were submitted to ANOVA, followed by the Student-Newman-Keuls test (p <0.05). RESULTS ΔE, ΔE00, and ΔWID were similar among the gels that promoted a bleaching effect after treatment (p <0.001). Mineral loss (SH and ΔKHN), Ra, and H2O2 diffusion were lower for HP/F/TMPnano; the HP and HP/Ca groups presented the highest values (p <0.001). For SEM/EDX, surface changes were observed in all bleached groups, but less intense with TMPnano. CONCLUSIONS Gels containing F/TMPnano do not interfere with the bleaching effect and reduce enamel demineralization, roughness, H2O2 diffusion, and morphological changes. CLINICAL RELEVANCE Whitening gels containing F/TMPnano can be used as a new strategy to increase safety and maintain clinical performance.
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Affiliation(s)
- Amanda Scarpin Gruba
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, Sao Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Gabriel Pereira Nunes
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, Sao Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Mariana Takatu Marques
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, Sao Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Marcelle Danelon
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, Sao Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Renata de Oliveira Alves
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, Sao Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Priscila Toninatto Alves de Toledo
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, Sao Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - André Luiz Fraga Briso
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, Sao Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Alberto Carlos Botazzo Delbem
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, Sao Paulo State University (UNESP), Araçatuba, SP, Brazil.
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Batista LAS, dos Reis-Prado AH, Chaves HGDS, de Arantes LC, Morgan LFSA, André CB, Suzuki TY, Benetti F. Can different agents reduce the damage caused by bleaching gel to pulp tissue? A systematic review of basic research. Restor Dent Endod 2023; 48:e39. [PMID: 38053785 PMCID: PMC10695728 DOI: 10.5395/rde.2023.48.e39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 08/14/2023] [Accepted: 08/16/2023] [Indexed: 12/07/2023] Open
Abstract
Objectives This study aimed to investigate the effectiveness of different topical/systemic agents in reducing the damage caused by bleaching gel to pulp tissue or cells. Materials and Methods Electronic searches were performed in July 2023. In vivo and in vitro studies evaluating the effects of different topical or systemic agents on pulp inflammation or cytotoxicity after exposure to bleaching agents were included. The risk of bias was assessed. Results Out of 1,112 articles, 27 were included. Nine animal studies evaluated remineralizing/anti-inflammatories agents in rat molars subjected to bleaching with 35%-38% hydrogen peroxide (HP). Five of these studies demonstrated a significant reduction in inflammation caused by HP when combined with bioglass or MI Paste Plus (GC America), or following KF-desensitizing or Otosporin treatment (n = 3). However, orally administered drugs did not reduce pulp inflammation (n = 4). Cytotoxicity (n = 17) was primarily assessed using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay on human dental pulp cells and mouse dental papilla Cell-23 cells. Certain substances, including sodium ascorbate, butein, manganese chloride, and peroxidase, were found to reduce cytotoxicity, particularly when applied prior to bleaching. The risk of bias was high in animal studies and low in laboratory studies. Conclusions Few in vivo studies have evaluated agents to reduce the damage caused by bleaching gel to pulp tissue. Within the limitations of these studies, it was found that topical agents were effective in reducing pulp inflammation in animals and cytotoxicity. Further analyses with human pulp are required to substantiate these findings. Trial Registration PROSPERO Identifier: CRD42022337192.
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Affiliation(s)
- Letícia Aparecida Silva Batista
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte, MG, Brazil
| | | | | | - Lara Cancella de Arantes
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte, MG, Brazil
| | | | - Carolina Bosso André
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte, MG, Brazil
| | - Thaís Yumi Suzuki
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte, MG, Brazil
| | - Francine Benetti
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), School of Dentistry, Belo Horizonte, MG, Brazil
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Nijakowski K, Ortarzewska M, Jankowski J, Lehmann A, Surdacka A. The Role of Cellular Metabolism in Maintaining the Function of the Dentine-Pulp Complex: A Narrative Review. Metabolites 2023; 13:metabo13040520. [PMID: 37110177 PMCID: PMC10143950 DOI: 10.3390/metabo13040520] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/04/2023] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
The cellular metabolic processes ensure the physiological integrity of the dentine-pulp complex. Odontoblasts and odontoblast-like cells are responsible for the defence mechanisms in the form of tertiary dentine formation. In turn, the main defence reaction of the pulp is the development of inflammation, during which the metabolic and signalling pathways of the cells are significantly altered. The selected dental procedures, such as orthodontic treatment, resin infiltration, resin restorations or dental bleaching, can impact the cellular metabolism in the dental pulp. Among systemic metabolic diseases, diabetes mellitus causes the most consequences for the cellular metabolism of the dentine-pulp complex. Similarly, ageing processes present a proven effect on the metabolic functioning of the odontoblasts and the pulp cells. In the literature, several potential metabolic mediators demonstrating anti-inflammatory properties on inflamed dental pulp are mentioned. Moreover, the pulp stem cells exhibit the regenerative potential essential for maintaining the function of the dentine-pulp complex.
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Affiliation(s)
- Kacper Nijakowski
- Department of Conservative Dentistry and Endodontics, Poznan University of Medical Sciences, 60-812 Poznan, Poland
| | - Martyna Ortarzewska
- Department of Conservative Dentistry and Endodontics, Poznan University of Medical Sciences, 60-812 Poznan, Poland
| | - Jakub Jankowski
- Student's Scientific Group in the Department of Conservative Dentistry and Endodontics, Poznan University of Medical Sciences, 60-812 Poznan, Poland
| | - Anna Lehmann
- Department of Conservative Dentistry and Endodontics, Poznan University of Medical Sciences, 60-812 Poznan, Poland
| | - Anna Surdacka
- Department of Conservative Dentistry and Endodontics, Poznan University of Medical Sciences, 60-812 Poznan, Poland
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Caneschi CDS, Benetti F, de Oliveira LCA, Belchior JC, Ferreira RC, Moreira AN, Dos Santos Alves Morgan LF. Bleaching effectiveness and cytotoxicity of new experimental formulation of niobium-based bleaching gel. Clin Oral Investig 2023; 27:1613-1621. [PMID: 36607491 DOI: 10.1007/s00784-022-04785-3] [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: 07/12/2022] [Accepted: 11/08/2022] [Indexed: 01/07/2023]
Abstract
OBJECTIVES The development of new bleaching agents with minimum concentration of hydrogen peroxide (HP), without adverse effects, and with bleaching effectiveness, has great clinical relevance. The aim of this study was to evaluate the bleaching efficacy and cytotoxicity of a new niobium-based bleaching gel, compared to already available HP-based gels. MATERIALS AND METHODS For the bleaching efficacy analysis, 40 bovine incisors were randomly divided into 4 groups according to the established bleaching protocol: control, untreated; 35HP, 35% HP bleaching gel; 6HP, 6% HP bleaching gel; NbHP, niobium gel associated with 3% HP gel. The color variation was measured in a spectrophotometer and the values of ΔL, Δa, Δb, and ΔE obtained. For the cell viability assay by MTT, MC3T3 cells were exposed to bleaching gel extracts (1:500, 1:250, 1:125 dilutions; immediately and 24 h). Statistical tests were performed (P < 0.05). RESULTS The color alteration for all bleaching gels was significant compared to control (P < 0.05), but the NbHP gel showed a significant ΔE than other gels, with expressive color alteration at 14 days (P < 0.05). The 35HP showed high cytotoxicity regarding control and the most groups in all periods and extracts analyzed (P < 0.05), while the NbHP showed greater cell viability than control in the immediate period, dilution of the 1:500 and superior to 6HP in the most extracts at 24 h. CONCLUSION The new experimental niobium-based gel has bleaching efficacy similar to that of gels with a high concentration of HP, and it has high cytocompatibility. CLINICAL RELEVANCE The use of this new generation of niobium-based whitening gel associated with a low concentration of hydrogen peroxide represents the possibility of a tooth whitening with lower dentin sensitivity.
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Affiliation(s)
- Camila de Sousa Caneschi
- Department of Restorative Dentistry, Federal University of Minas Gerais, Avenida Antônio Carlos, 6627 - Bairro Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Francine Benetti
- Department of Restorative Dentistry, Federal University of Minas Gerais, Avenida Antônio Carlos, 6627 - Bairro Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Luiz Carlos Alves de Oliveira
- Department of Chemistry, Federal University of Minas Gerais, Avenida Antônio Carlos, 6627 - Bairro Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Jadson Cláudio Belchior
- Department of Chemistry, Federal University of Minas Gerais, Avenida Antônio Carlos, 6627 - Bairro Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Raquel Conceição Ferreira
- Department of Social and Preventive Dentistry, Federal University of Minas Gerais, Avenida Antônio Carlos, 6627 - Bairro Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Allyson Nogueira Moreira
- Department of Restorative Dentistry, Federal University of Minas Gerais, Avenida Antônio Carlos, 6627 - Bairro Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil.
| | - Luís Fernando Dos Santos Alves Morgan
- Department of Restorative Dentistry, Federal University of Minas Gerais, Avenida Antônio Carlos, 6627 - Bairro Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil
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Roderjan DA, Stanislawczuk R, Soares DG, de Souza Costa CA, Favoreto MW, Reis A, Loguercio AD. Effect of medium or high concentrations of in-office dental bleaching gel on the human pulp response in the mandibular incisors. Restor Dent Endod 2023. [DOI: 10.5395/rde.2023.48.e12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023] Open
Affiliation(s)
- Douglas Augusto Roderjan
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Rodrigo Stanislawczuk
- Department of Restorative Dentistry, School of Dentistry, Campos Gerais Higher Education Center - CESCAGE, Ponta Grossa, PR, Brazil
| | - Diana Gabriela Soares
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Carlos Alberto de Souza Costa
- Department of Physiology and Pathology, Araraquara School of Dentistry, São Paulo State University, Araraquara, SP, Brazil
| | - Michael Willian Favoreto
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Alessandra Reis
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Alessandro D. Loguercio
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
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de Oliveira Ribeiro RA, Zuta UO, Soares IPM, Anselmi C, Soares DG, Briso ALF, Hebling J, de Souza Costa CA. Manganese oxide increases bleaching efficacy and reduces the cytotoxicity of a 10% hydrogen peroxide bleaching gel. Clin Oral Investig 2022; 26:7277-7286. [PMID: 35974255 DOI: 10.1007/s00784-022-04688-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 08/11/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The study aims to assess the effects of a 10% H2O2 bleaching gel with different MnO2 concentrations on the bleaching efficacy (BE), degradation kinetics (DK) of H2O2, and trans-amelodentinal cytotoxicity (TC). MATERIALS AND METHODS Standardized bovine enamel/dentin disks (n = 96) were placed in artificial pulp chambers, and the bleaching gels were applied for 45 min. Thus, the following groups were established: (G1) no treatment (negative control/NC); (G2) 35% H2O2 (positive control/PC); (G3) 10% H2O2; (G4) 10% H2O2 + 2 mg/mL MnO2; (G5) 10% H2O2 + 6 mg/mL MnO2; and (G6) 10% H2O2 + 10 mg/mL MnO2. After analyzing bleaching efficacy (ΔE00 and ΔWI), the degradation kinetics of H2O2 and trans-amelodentinal cytotoxicity were determined (n = 8, ANOVA/Tukey; p < 0.05). RESULTS G6 presented BE (ΔE00 and ΔWI) statistically similar to G2, which represented conventional in-office bleaching (p = 0.6795; p > 0.9999). A significant reduction in the diffusion of H2O2 occurred in G3, G4, G5, and G6 compared to G2 (p < 0.0001). The highest DK of H2O2 occurred in G6 (p < 0.0001), which had the lowest TC in comparison with all other bleached groups (p ≤ 0.0186). CONCLUSION The addition of 10 mg/mL of MnO2 in a 10% H2O2 bleaching gel potentiates the degradation of this reactive molecule, which increases the BE of the product and decreases TC. CLINICAL SIGNIFICANCE Replacing a 35% H2O2 gel commonly used for conventional in-office dental bleaching by a 10% H2O2 gel containing 10 mg/mL of MnO2 reduces the cytotoxicity of this professional therapy, maintaining its excellent esthetic efficacy.
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Affiliation(s)
| | - Uxua Ortecho Zuta
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Igor Paulino Mendes Soares
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Caroline Anselmi
- Department of Morphology and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Diana Gabriela Soares
- Department of Dentistry, Endodontics and Dental Materials, School of Dentistry, São Paulo University (USP), Bauru, Brazil
| | - André Luiz Fraga Briso
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Aracatuba, Brazil
| | - Josimeri Hebling
- Department of Morphology and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Carlos Alberto de Souza Costa
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil.
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da Silva LMAV, Cintra LTA, de Alcântara S, Machado NEDS, Benetti F, Ervolino E, Briso ALF. Influence of violet LED associated or not with peroxide gel on inflammation, mineralization, and collagen fiber maturation in dentin and pulp tissue. Photodiagnosis Photodyn Ther 2022; 39:102959. [PMID: 35691564 DOI: 10.1016/j.pdpdt.2022.102959] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 06/01/2022] [Accepted: 06/08/2022] [Indexed: 11/19/2022]
Abstract
OBJECTIVES To evaluate the influence of violet LED, associated or not with a 17.5% hydrogen peroxide (HP) bleaching gel, on inflammation, mineralization in pulp tissue, and collagen fiber maturation in dentin and pulp tissue. MATERIALS AND METHODS The maxillary molars of eighty Wistar rats were distributed into four groups (n = 10): CONT - without treatment; HP - 30-minute application of 17.5% HP; LED - 20-minute application of violet LED; and HP+LED - application of PH and violet LED. Rats were euthanized and jaws were processed for histologic and immunohistochemical evaluation (IL-17, IL-23, and osteocalcin) and picrosirius red immediately after (T0), and at 7 (T1), 15 (T2), and 30 days (T3) post-treatment, with Wilcoxon, Mann-Whitney, paired T-test, and T-test (α = 0.05). RESULTS HP and HP+LED presented necrosis and severe inflammatory infiltrate. When compared to CONT group, LED presented severe osteocalcin (OCN) immunostaining in T2 and less immature fibers in T2 and T3. CONCLUSION The violet LED caused no severe damage to the pulp tissue, increased IL-17 and IL-23 expression in T0 when associated with HP, and had no influence on pulp tissue mineralization, besides accelerating the maturation of collagen fibers of dentin. CLINICAL RELEVANCE Violet LED therapy induced no inflammation in the pulp tissue of rats and played no role in pulp tissue fibrosis, besides accelerating the maturation of dentin collagen fibers.
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Affiliation(s)
- Livia Maria Alves Valentim da Silva
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil
| | - Luciano Tavares Angelo Cintra
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil
| | - Sibele de Alcântara
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil
| | - Nathália Evelyn da Silva Machado
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil
| | - Francine Benetti
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Edilson Ervolino
- Department of Basic Sciences São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - André Luiz Fraga Briso
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil.
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14
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Carneiro AMP, Barros APO, de Oliveira RP, de Paula BLF, Silva AM, de Melo Alencar C, Silva CM. The effect of photobiomodulation using low-level laser therapy on tooth sensitivity after dental bleaching: a systematic review. Lasers Med Sci 2022; 37:2791-2804. [PMID: 35597839 DOI: 10.1007/s10103-022-03578-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 05/16/2022] [Indexed: 11/30/2022]
Abstract
The authors aimed to conduct a systematic review to assess data from the current literature on the effectiveness of low-level laser therapy (LLLT) in preventing tooth sensitivity (TS) after tooth whitening (DB). PRISMA guidelines for systematic reviews were followed. Clinical trials evaluating the treatment of LLLT in patients with sensitivity after tooth whitening were selected. A full bibliographic search was performed on May 4, 2021, in the following databases: Embase, MEDLINE via PubMed, SciELO, VHL Regional Portal, Web of Science, Gray Literature, Scopus, ClinicalTrials.gov and Cochrane Library. This study followed Cochrane's recommendations for analyzing risk of bias. A total of 1054 studies were found (255 studies were excluded because they were duplicates and 785 because of titles and abstracts). Only 14 articles were selected for analysis, of which eight were excluded because they had one or more exclusion criteria, resulting in six articles included in this systematic review, the vast majority being classified as low risk of bias. The studies reviewed indicated that LLLT showed promise in preventing TS after TB. However, evidence is limited and more clinical trials with low risk of bias are needed to reach a definitive conclusion on the action of LLLT in pain control after TB.
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Affiliation(s)
| | | | | | | | - Aryvelto Miranda Silva
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University, Araraquara, SP, Brazil
| | - Cristiane de Melo Alencar
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University, Araraquara, SP, Brazil
| | - Cecy Martins Silva
- School of Dentistry, Federal University of Pará, Augusto Correa Av, No 1, Guamá, Belém, Pará, 66075-110, Brazil. .,Dental Materials Laboratory of the Postgraduate Program in Dentistry, Federal University of Pará, Belém, PA, Brazil.
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15
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Júnior NAN, Nunes GP, Gruba AS, Danelon M, da Silva LMAV, de Farias Batista G, Briso ALF, Delbem ACB. Evaluation of bleaching efficacy, microhardness, and trans-amelodentinal diffusion of a novel bleaching agent for an in-office technique containing hexametaphosphate and fluoride. Clin Oral Investig 2022; 26:5071-5078. [PMID: 35403911 DOI: 10.1007/s00784-022-04480-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 04/05/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVE This study evaluated in vitro the effects of calcium gluconate (CaGlu), sodium fluoride (NaF), sodium hexametaphosphate (HMP), and NaF/TMP added to a 35% hydrogen peroxide (H2O2) bleaching gel on the color change, enamel hardness, and trans-amelodentinal diffusion. MATERIALS AND METHODS Enamel discs/bovine dentin (n = 150) were divided according to the bleaching gel: 35% H2O2 (H2O2); 35% H2O2 + 0.1% NaF (H2O2/NaF); 35% H2O2 + 1% HMP (H2O2/HMP); 35% H2O2 + 0.1% NaF + 1% HMP (H2O2/NaF/HMP), and 35% H2O2 + 2% CaGlu (H2O2/Caglu). The bleaching gels were applied three times (40 min/session) at 7-day intervals between each application. Then, color alteration (ΔE), whitening index (ΔWID), percentage of surface hardness loss (% SH), cross-sectional hardness (ΔKHN), and trans-amelodentinal diffusion were determined. Data were submitted for analysis of variance (ANOVA), followed by the Student-Newman-Keuls test (p < 0.05). RESULTS All bleaching gels showed significant color changes after treatment (p < 0.001). ΔE and ΔWID were similar among the evaluated gels. Mineral loss (% SH and ΔKHN) and trans-amelodentinal diffusion of hydrogen peroxide were lower for H2O2/NaF/HMP; the H2O2/CaGlu group presented the highest values about the other groups (p < 0.001). CONCLUSION It is possible to conclude that the addition of NaF/HMP to the in-office bleaching agent did not interfere with the bleaching efficacy and reduced enamel demineralization and H2O2 diffusion. CLINICAL SIGNIFICANCE The association of NaF/HMP to the bleaching gel can be used as a novel approach for minimizing the adverse effects of H2O2 by-products and with similar clinical efficacy.
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Affiliation(s)
- Nilson Antônio Nunes Júnior
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University-UNESP, Rua José Bonifácio 1193, Araçatuba, SP, 16015-050, Brazil
| | - Gabriel Pereira Nunes
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University-UNESP, Rua José Bonifácio 1193, Araçatuba, SP, 16015-050, Brazil
| | - Amanda Scarpin Gruba
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University-UNESP, Rua José Bonifácio 1193, Araçatuba, SP, 16015-050, Brazil
| | - Marcelle Danelon
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University-UNESP, Rua José Bonifácio 1193, Araçatuba, SP, 16015-050, Brazil
| | - Lívia Maria Alves Valentim da Silva
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University-UNESP, Rua José Bonifácio 1193, Araçatuba, SP, 16015-050, Brazil
| | - Gabriella de Farias Batista
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University-UNESP, Rua José Bonifácio 1193, Araçatuba, SP, 16015-050, Brazil
| | - André Luiz Fraga Briso
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University-UNESP, Rua José Bonifácio 1193, Araçatuba, SP, 16015-050, Brazil
| | - Alberto Carlos Botazzo Delbem
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University-UNESP, Rua José Bonifácio 1193, Araçatuba, SP, 16015-050, Brazil.
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Akt-GSK3β-mPTP pathway regulates the mitochondrial dysfunction contributing to odontoblasts apoptosis induced by glucose oxidative stress. Cell Death Dis 2022; 8:168. [PMID: 35383148 PMCID: PMC8983683 DOI: 10.1038/s41420-022-00981-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/19/2022] [Accepted: 03/23/2022] [Indexed: 02/07/2023]
Abstract
Diabetes Mellitus can cause dental pulp cells apoptosis by oxidative stress, and affect the integrity and function of dental pulp tissue. Mitochondria are the main attack targets of oxidative stress and have a critical role in apoptosis. However, whether mitochondria are involved in dental pulp damage caused by diabetes mellitus remains unclear. This study aimed to investigate the role of mitochondria in the apoptosis of odontoblast-like cell line (mDPC6T) induced by glucose oxidative stress, and to explore its possible mechanism. We established an oxidative stress model in vitro using glucose oxidase/glucose to simulate the pathological state under diabetic conditions. We found that the opening of mitochondrial permeability transition pore (mPTP) contributed to the apoptosis of mDPC6T treated with glucose oxidase, as evidenced by enhanced mitochondrial reactive oxygen species (mtROS) and intracellular Ca2+ disorder, significantly reduced mitochondrial membrane potential (MMP) and ATP production. Antioxidant N-acetylcysteine (NAC) or Cyclosporine A (mPTP inhibitor) blocked the mPTP opening, which significantly attenuated mitochondrial dysfunction and apoptosis induced by glucose oxidative stress. In addition, we found that glucose oxidative stress stimulated mPTP opening may through inhibition of Akt-GSK3β pathway. This study provides a new insight into the mitochondrial mechanism underlying diabetes-associated odontoblast-like cell apoptosis, laying a foundation for the prevention and treatment of diabetes-associated pulp injury.
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Soares DG, Sacono NT, Ribeiro APD, Leite ML, Duque CCDO, Gallinari MDO, Pacheco LE, Hebling J, Costa CADS. Pro-inflammatory mediators expression by pulp cells following tooth whitening on restored enamel surface. Braz Dent J 2022; 33:83-90. [PMID: 35508040 PMCID: PMC9645150 DOI: 10.1590/0103-6440202204688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 01/07/2022] [Indexed: 12/05/2022] Open
Abstract
This paper aimed to assess the influence of adhesive restoration interface on the
diffusion of hydrogen peroxide (H2O2), indirect toxicity,
and pro-inflammatory mediators expression by odontoblast-like cells, after
in-office tooth whitening. Dental cavities prepared in bovine enamel/dentin
discs were adhesively restored and subjected or not to hydrolytic degradation
(HD). A whitening gel with 35% H2O2 (WG) was applied for
45 min onto restored and non-restored specimens adapted to artificial pulp
chambers giving rise to the groups: SD- intact discs (control); SD/HP- whitened
intact discs; RT/HP- restored and whitened discs; and RT/HD/HP- restored and
whitened discs subjected to HD. The extracts (culture medium + WG components
diffused through enamel/dentin/restoration interface) were collected and applied
to odontoblast-like MDPC-23 cells. The study evaluated the amount of
H2O2 in the extracts, as well as the cell viability
(CV), cell morphology (CM), and gene expression of inflammatory mediators (TNF-α
and COX-2) by the pulp cells exposed to the extracts (ANOVA and Tukey tests; 5%
significance). All whitened groups presented lower CV than SD (control;
p<0.05). The highest CV reduction and gene expression of TNF-α and COX-2 was
observed in the RT/HD/HP group in comparison with SD/HP and RT/HP (control;
p<0.05). CM alterations occurred in all whitened groups. The intensity of
these cell side effects was directly related with the amount of
H2O2 in the extracts. We concluded that adhesive
restoration of dental cavity increases the H2O2 diffusion
after in-office whitening, enhancing the indirect toxicity of this therapy and
trigger pro-inflammatory overexpression by MDPC-23 cells.
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Topical application of Otosporin® before in-office bleaching: a split mouth, triple-blind, multicenter randomized clinical trial. Clin Oral Investig 2021; 26:2555-2564. [PMID: 34668065 DOI: 10.1007/s00784-021-04224-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 10/10/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES To evaluate if the topical application of Otosporin® before in-office bleaching with a 35% hydrogen peroxide (HP) gel reduces the risk and intensity of tooth sensitivity (TS), as well as the bleaching effectiveness. MATERIALS AND METHODS Twenty participants were selected for this split mouth, triple-blind, multicenter randomized clinical trial. Before each bleaching session, the placebo was applied in the patient's hemi-arch and the other half received the Otosporin®, according to the randomization procedure. Both products were applied topically for 10 min. The 35% HP was applied in two sessions with a 1-week interval. The risk and intensity of TS were assessed using the Numerical Scale (NRS) and the Visual Analog Scale (VAS). The bleaching effectiveness were evaluated with the visual scales and with a digital spectrophotometer. The absolute risk of TS was compared by McNemar's test. To compare the intensity of TS, the Wilcoxon signed-rank test was used to evaluate the NRS, while the paired t test was used to evaluate VAS. Bleaching effectiveness (ΔSGUs and ΔEab, ΔE00, and ΔWID) was compared between groups using the paired t-test (α = 0.05). RESULTS No significant difference at risk (p = 1.0) and intensity of TS (p > 0.59; VAS and p = 1.00 for NRS) was detected between groups. For both groups, a significant bleaching was observed after 30 days of evaluation (p < 0.39). CONCLUSIONS The previous application of Otosporin® in the in-office bleaching did not reduce the risk and intensity of TS and did not affect the effectiveness of the bleaching. CLINICAL RELEVANCE The application of Otosporin® before in-office bleaching with 35% HP was not able to reduce the risk and intensity of TS.
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Chen C, Huang X, Zhu W, Ding C, Huang P, Li R. H2O2 gel bleaching induces cytotoxicity and pain conduction in dental pulp stem cells via intracellular reactive oxygen species on enamel/dentin disc. PLoS One 2021; 16:e0257221. [PMID: 34506603 PMCID: PMC8432789 DOI: 10.1371/journal.pone.0257221] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/25/2021] [Indexed: 01/26/2023] Open
Abstract
Background Bleaching is widely accepted for improving the appearance of discolored teeth; however, patient compliance is affected by bleaching-related complications, especially bleaching sensitivity. This study aimed to investigate the role of reactive oxygen species (ROS) in cytotoxicity and pain conduction activated by experimental tooth bleaching. Methods Dental pulp stem cells with or without N-acetyl-L-cysteine (NAC), an ROS scavenger, were cultured on the dentin side of the enamel/dentin disc. Subsequently, 15% (90 min) and 40% (30 min) bleaching gels were painted on the enamel surface. Cell viability, intracellular ROS, Ca2+, adenosine triphosphate (ATP), and extracellular ATP levels were evaluated using the Cell Counting Kit-8 assay, 2’,7’-dichlorodihydrofluorescein diacetate, CellROX, fura-3AM fluorescence assay, and ATP measurement kit. The rat incisor model was used to evaluate in vivo effects after 0, 1, 3, 7, and 30 days of bleaching. Changes in gene and protein expression of interleukin 6 (IL-6), tumor necrosis factor-alpha (TNFα), transient receptor potential ankyrin 1 (TRPA1), and Pannexin1 (PANX1) in dental pulp stem cells and pulp tissue were detected through RT-PCR, western blotting, and immunofluorescence. Results The bleaching gel suppressed dental pulp stem cell viability and extracellular ATP levels and increased intracellular ROS, Ca2+, and intracellular ATP levels. The mRNA and protein expression of IL-6, TNFα, TRPA1, and PANX1 were up-regulated in vitro and in vivo. Furthermore, the 40% gel had a stronger effect than the 15% gel, and NAC ameliorated the gel effects. Conclusions Our findings suggest that bleaching gels induce cytotoxicity and pain conduction in dental pulp stem cells via intracellular ROS, which may provide a potential therapeutic target for alleviating tooth bleaching nociception.
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Affiliation(s)
- Chang Chen
- Department of Stomatology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiansheng Huang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Wenqiang Zhu
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chen Ding
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Piaopiao Huang
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Rong Li
- Department of Stomatology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- * E-mail:
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20
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TRPA1 triggers hyperalgesia and inflammation after tooth bleaching. Sci Rep 2021; 11:17418. [PMID: 34465829 PMCID: PMC8408176 DOI: 10.1038/s41598-021-97040-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/19/2021] [Indexed: 01/26/2023] Open
Abstract
Hyperalgesia has become a major problem restricting the clinical application of tooth bleaching. We hypothesized that transient receptor potential ankyrin 1 (TRPA1), a pain conduction tunnel, plays a role in tooth hyperalgesia and inflammation after bleaching. Dental pulp stem cells were seeded on the dentin side of the disc, which was cut from the premolar buccal tissue, with 15% (90 min) or 40% (3 × 15 min) bleaching gel applied on the enamel side, and treated with or without a TRPA1 inhibitor. The bleaching gel stimulated intracellular reactive oxygen species, Ca2+, ATP, and extracellular ATP in a dose-dependent manner, and increased the mRNA and protein levels of hyperalgesia (TRPA1 and PANX1) and inflammation (TNFα and IL6) factors. This increment was adversely affected by TRPA1 inhibitor. In animal study, the protein levels of TRPA1 (P = 0.0006), PANX1 (P < 0.0001), and proliferation factors [PCNA (P < 0.0001) and Caspase 3 (P = 0.0066)] increased significantly after treated rat incisors with 15% and 40% bleaching gels as detected by immunohistochemistry. These results show that TRPA1 plays a critical role in sensitivity and inflammation after tooth bleaching, providing a solid foundation for further research on reducing the complications of tooth bleaching.
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21
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Reis-Prado AHD, Grossi IR, Chaves HGDS, André CB, Morgan LFDSA, Briso ALF, Cintra LTA, Benetti F. Influence of Hydrogen Peroxide on Mineralization in Dental Pulp Cells: A Systematic Review. FRONTIERS IN DENTAL MEDICINE 2021. [DOI: 10.3389/fdmed.2021.689537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background: Dental bleaching agents show the ability to permeate through dental hard tissues, which may lead to pulp tissue changes. This systematic review (PROSPERO register: CRD42020213767) is aimed at understanding the effects of bleaching agents on the process of mineralization of the pulp tissue.Methods: Only in vitro studies evaluating the influence of hydrogen peroxide (HP) on mineralization in dental pulp cells were included. Studies without a non-bleached control group or cells after co-treatment with a bleaching agent other than HP and/or carbamide peroxide were excluded. The primary outcomes evaluated were alkaline phosphatase (ALP) activity and mineralized nodule deposition. The mineralization markers analysis in dental pulp cells and the cell viability were considered secondary outcomes. Two independent authors conducted a systematic search (PubMed/MEDLINE, Scopus, Embase, Cochrane Library, and OpenGrey until January 2021) with no language restrictions and performed data extraction. The quality assessment was appraised according to a modified Joanna Briggs Institute critical appraisal checklist.Results: The search resulted in 473 studies, and 11 were considered eligible. Overall, a reduction in the process of mineralization was observed among pulp cells after bleaching. A reduction in the ALP activity was reported in the mostly bleached groups using different protocols and analysis periods of nine studies. Regarding mineralized nodule deposition, 6 studies reported a significant reduction from 7 to 21 days among bleached groups. Of those three studies that investigated other mineralization markers, two found a reduction in the expression of dentin matrix acidic phosphoprotein (DMP)-1, dentin sialophosphoprotein (DSPP), and matrix extracellular phosphoglycoprotein (MEPE) among some bleaching gel concentrations. In contrast, one study showed a greater expression of osteopontin (OPN) and osteocalcin (OCN) in 100 μmol/L HP after 5 or 10 min of exposure, and another study showed significant induction of DSPP in concentrations of up to 0.5 mmol/L HP.Conclusion: Especially, high concentrations of bleaching gel reduce the potential of mineralization in pulp cells in in vitro studies; however, different HP concentrations, bleaching protocols, and analysis periods can influence this outcome.
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Wang K, Yu Q, Wu D, Liu R, Ren X, Fu H, Zhang X, Pan Y, Huang S. JNK-mediated blockage of autophagic flux exacerbates the triethylene glycol dimethacrylate-induced mitochondrial oxidative damage and apoptosis in preodontoblast. Chem Biol Interact 2021; 339:109432. [PMID: 33684387 DOI: 10.1016/j.cbi.2021.109432] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/26/2021] [Accepted: 03/03/2021] [Indexed: 10/22/2022]
Abstract
Mitochondrial dependent oxidative stress (OS) and subsequent cell death are considered as the major cytotoxicity caused by Triethylene glycol dimethacrylate (TEGDMA), a commonly monomer of many resin-based dental composites. Under OS microenvironment, autophagy serves as a cell homeostatic mechanism and maintains redox balance through degradation or turnover of cellular components in order to promote cell survival. However, whether autophagy is involved in the mitochondrial oxidative damage and apoptosis induced by TEGDMA, and the cellular signaling pathways underlying this process remain unclear. In the present study, we demonstrated that TEGDMA induced mouse preodontoblast cell line (mDPC6T) dysfunctional mitochondrial oxidative response. In further exploring the underlying mechanisms, we found that TEGDMA impaired autophagic flux, as evidenced by increased LC3-II expression and hindered p62 degradation, thereby causing both mitochondrial oxidative damage and cell apoptosis. These results were further verified by treatment with chloroquine (autophagy inhibitor) and rapamycin (autophagy promotor). More importantly, we found that the JNK/MAPK pathway was the key upstream regulator of above injury process. Collectively, our finding firstly demonstrated that TEGDMA induced JNK-dependent autophagy, thereby promoting mitochondrial dysfunction-associated oxidative damage and apoptosis in preodontoblast.
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Affiliation(s)
- Konghuai Wang
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Qihao Yu
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Danni Wu
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Ruona Liu
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Xuekun Ren
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Hui Fu
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Xiaorong Zhang
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Yihuai Pan
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China.
| | - Shengbin Huang
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China; Department of Prosthodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China.
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Zhang H, Liu H, Kataoka S, Kinukawa M, Uchiyama K, Kambe J, Watanabe G, Jin W, Nagaoka K. L-amino acid oxidase 1 in sperm is associated with reproductive performance in male mice and bulls. Biol Reprod 2021; 104:1154-1161. [PMID: 33590844 DOI: 10.1093/biolre/ioab024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 01/21/2021] [Accepted: 02/12/2021] [Indexed: 11/14/2022] Open
Abstract
Sperm quality is an important indicator of male fertility, and a suitable biomarker enables the selection of high-quality spermatozoa. We previously found that L-amino acid oxidase encoded by the L-amino acid oxidase 1 (Lao1) gene exerts biological roles in the mammary gland and brain by converting specific L-amino acids into keto acids, ammonia, and hydrogen peroxide (H2O2). Here, we describe the role of Lao1 in male reproduction. Lao1-deficient (Lao1-/-) male mice generated fewer pregnant embryos and pups as well as lower ratios of fertilized oocytes and even ovulated number was not different, suggesting that male subfertility caused the smaller litters. We found that LAO1 expressed in acrosomes is associated with high malformation ratios and low viability of Lao1-/- sperm. Wild-type (WT) sperm produced more H2O2 than Lao1-/- sperm, and 10 μM H2O2 restored knockout (KO) sperm viability in vitro. In addition, the sperm ratio of induced acrosome reaction was higher in WT than in Lao1-/- sperm incubated with the calcium ionophore A23187. Moreover, LAO1 expression was abundant in bovine sperm with high fertilization ratios. We concluded that LAO1 localized in the sperm acrosome influences sperm viability and morphology as well as the acrosome reaction, and that LAO1-deficient sperm might cause male subfertility. Thus, LAO1 might serve as a novel marker for selecting high-quality spermatozoa, especially for livestock reproduction.
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Affiliation(s)
- Haolin Zhang
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Laboratory of Animal Physiology, College of Biological Science and Biotechnology, Beijing Forestry University, Beijing, China
| | - Hong Liu
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Sachi Kataoka
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Masashi Kinukawa
- Division of Animal Reproduction, Maebashi Institute of Animal Science, Livestock Improvement Association of Japan (LIAJ), Maebashi, Japan
| | - Kyoko Uchiyama
- Division of Animal Reproduction, Maebashi Institute of Animal Science, Livestock Improvement Association of Japan (LIAJ), Maebashi, Japan
| | - Jun Kambe
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Gen Watanabe
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Wanzhu Jin
- Institute of Zoology, Chinese Academy of Sciences, Chaoyang, Beijing, China
| | - Kentaro Nagaoka
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo, Japan
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24
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A pyrene-based ratiometric fluorescent probe with a large Stokes shift for selective detection of hydrogen peroxide in living cells. J Pharm Anal 2020; 10:490-497. [PMID: 33133733 PMCID: PMC7591780 DOI: 10.1016/j.jpha.2020.07.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 07/12/2020] [Accepted: 07/15/2020] [Indexed: 01/13/2023] Open
Abstract
Hydrogen peroxide (H2O2) plays a significant role in regulating a variety of biological processes. Dysregulation of H2O2 can lead to various diseases. Although numerous fluorescent imaging probes for H2O2 have been reported, the development of H2O2 ratiometric fluorescent probe with large Stokes shift remains rather limited. Such probes have shown distinct advantages, such as minimized interference from environment and improved signal-to noise ratio. In this work, we reported a new pyrene-based compound Py-VPB as H2O2 fluorescent probe in vitro. The probe demonstrated ratiometric detection behavior, large Stokes shift and large emission shift. In addition, the probe showed high sensitivity and selectivity towards H2O2 in vitro. Based on these excellent properties, we successfully applied Py-VPB to the visualization of exogenous and endogenous H2O2 in living cells. Cell imaging study also showed that our probe was localized in the mitochondria. We envision that the probe can provide a useful tool for unmasking the biological roles of mitochondrial H2O2 in living systems. The first pyrene-based fluorescent probe for H2O2 detection with ratiometric readout was presented. The probe has shown prominent properties in detecting H2O2, such as high sensitivity & selectivity and large Stokes shift. The probe was successfully applied to visualizing exogenous and endogenous H2O2 in living cells.
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25
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C. de Silva C, de M. Alencar C, de Paula BLF, de A. Jassé FF, Araújo JLN, Silva CM. Photobiomodulation vs. Placebo on Post-Bleaching Sensitivity and Color Change: A Split-Mouth Clinical Study. Open Dent J 2020. [DOI: 10.2174/1874210602014010267] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Objective:
This study aimed to investigate the efficiency of Photobiomodulation (PBM) with low-level LASER therapy compared to placebo in post-bleaching sensitivity and color change during a three-week office bleaching treatment.
Methods:
A split-mouth model was used to evaluate 21 subjects. The right and left hemi-archs were randomized to one of two groups: GP (placebo): simulated LASER application followed by tooth bleaching with 35% hydrogen peroxide; and GL: treated with PBM followed by tooth bleaching with 35% hydrogen peroxide. A four-degree modified Visual Analog Scale (VAS) was used to assess tooth sensitivity after the application of an evaporative stimulus (stimulated pain). In addition, a daily questionnaire was used to measure unstimulated pain. The color change was measured using a spectrophotometer. The Friedman and Wilcoxon tests were used to analyze data sensitivity. Color results were statistically analyzed using Analysis Of Variance (ANOVA) followed by the Tukey post-hoc test.
Results:
There was no significant difference between GP and GL for stimulated pain evaluation (p> 0.05). However, there was a significant difference between the groups for unstimulated pain evaluation (p≤ 0.05). In addition, ΔE data did not reveal any significant difference in tooth color between groups at any time (p> 0.05).
Conclusion:
PBM prevented post-bleaching sensitivity compared to placebo, based on the daily pain assessment questionnaires. PBM did not compromise the quality of bleaching treatments.
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Carminatti M, Benetti F, Siqueira RL, Zanotto ED, Briso ALF, Chaves-Neto AH, Cintra LTA. Experimental gel containing bioactive glass-ceramic to minimize the pulp damage caused by dental bleaching in rats. J Appl Oral Sci 2020; 28:e20190384. [PMID: 32520077 PMCID: PMC7299561 DOI: 10.1590/1678-7757-2019-0384] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 04/17/2020] [Indexed: 12/26/2022] Open
Abstract
Objectives This study evaluated if the use of a bioactive glass-ceramic-based gel, named Biosilicate (BS), before, after or mixed with bleaching gel, could influence the inflammation of the dental pulp tissue of rats’ molars undergoing dental bleaching with hydrogen peroxide (H2O2). Methodology The upper molars of Wistar rats (Rattus norvegicus, albinus) were divided into Ble: bleached (35% H2O2, 30-min); Ble-BS: bleached and followed by BS-based gel application (20 min); BS-Ble: BS-based gel application and then bleaching; BS/7d-Ble: BS-based gel applications for 7 days and then bleaching; Ble+BS: blend of H2O2 with BS-based gel (1:1, 30-min); and control: placebo gel. After 2 and 30 days (n=10), the rats were euthanized for histological evaluation. The Kruskal-Wallis and Dunn statistical tests were performed (P<0.05). Results At 2 days, the Ble and Ble-BS groups had significant alterations in the pulp tissue, with an area of necrosis. The groups with the application of BS-based gel before H2O2 had moderate inflammation and partial disorganization in the occlusal third of the coronary pulp and were significantly different from the Ble in the middle and cervical thirds (P<0.05). The most favorable results were observed in the Ble+BS, which was similar to the control in all thirds of the coronary pulp (P>0.05). At 30 days, the pulp tissue was organized and the bleached groups presented tertiary dentin deposition. The Ble group had the highest deposition of tertiary dentin, followed by the Ble-BS, and both were different from control (P<0.05). Conclusion A single BS-based gel application beforehand or BS-based gel blended with a bleaching gel minimize the pulp damage induced by dental bleaching.
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Affiliation(s)
- Marina Carminatti
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brazil
| | - Francine Benetti
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brazil.,Universidade Federal de Minas Gerais (UFMG), Faculdade de Odontologia, Departamento de Odontologia Restauradora, Belo Horizonte, MG, Brazil
| | - Renato Luiz Siqueira
- Universidade Federal de São Carlos (UFSCar), Departamento de Engenharia de Materiais, Laboratório de Materiais Vitreos, São Carlos, SP, Brazil
| | - Edgar Dutra Zanotto
- Universidade Federal de São Carlos (UFSCar), Departamento de Engenharia de Materiais, Laboratório de Materiais Vitreos, São Carlos, SP, Brazil
| | - André Luiz Fraga Briso
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brazil
| | - Antônio Hernandes Chaves-Neto
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, SP, Brazil
| | - Luciano Tavares Angelo Cintra
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brazil
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da Silva LMAV, Cintra LTA, Gallinari MDO, Benetti F, Rahal V, Ervolino E, de Alcântara S, Briso ALF. Influence of pain-relieving therapies on inflammation and the expression of proinflammatory neuropeptides after dental bleaching treatment. Restor Dent Endod 2020; 45:e20. [PMID: 32483537 PMCID: PMC7239683 DOI: 10.5395/rde.2020.45.e20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 12/11/2022] Open
Abstract
Objectives To minimize the tooth sensitivity caused by in-office bleaching, many dentists use non-steroidal anti-inflammatory drugs and topical desensitizing gels containing potassium nitrate and sodium fluoride. This study aimed to evaluate the influence of these substances on inflammation and the expression of substance P and calcitonin gene-related peptide in pulp nerve fibers. Materials and Methods Seventy-two rats were divided into 6 groups as follows: GI, control; GII, only dental bleaching; GIII, only ibuprofen; GIV, ibuprofen administered 30 minutes before and after the bleaching treatment and every 12 hours until the analysis; GV, only topical application of a desensitizing agent; and GVI, topical application of a desensitizing agent before dental bleaching. Placebo gel was applied to the upper left jaw and the bleaching agent was applied to the upper right jaw in all groups. Subsequently, the groups were divided into 3 subgroups based on the time of analysis: 0, 24, and 48 hours after bleaching (n = 8). The rats were euthanized and the maxillae were processed and evaluated by histopathological and immunohistochemical analyses. The data were analyzed using the Kruskal-Wallis test, followed by the Dunn test (p < 0.05). Results In the bleaching groups, the inflammatory process and expression of neuropeptides decreased over time. The animals in which a desensitizing agent was applied showed better results within 24 hours. Conclusions The use of a desensitizing agent had positive effects on inflammation and pain-related neuropeptide expression, minimizing the painful effects of dental bleaching treatment.
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Affiliation(s)
| | | | | | - Francine Benetti
- Department of Restorative Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Vanessa Rahal
- Department of Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - Edilson Ervolino
- Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - Sibele de Alcântara
- Department of Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - André Luiz Fraga Briso
- Department of Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
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Terayama AM, Benetti F, de Araújo Lopes JM, Barbosa JG, Silva IJP, Sivieri-Araújo G, Briso ALF, Cintra LTA. Influence of low-level laser therapy on inflammation, collagen fiber maturation, and tertiary dentin deposition in the pulp of bleached teeth. Clin Oral Investig 2020; 24:3911-3921. [PMID: 32198660 DOI: 10.1007/s00784-020-03258-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 03/06/2020] [Indexed: 11/25/2022]
Abstract
OBJECTIVES We evaluated the effects of low-level laser therapy (LLLT) using an infrared laser (IRL) and a red laser (RL) on the pulp of molar teeth in rats after dental bleaching to assess inflammation, collagen fiber maturation, and tertiary dentin formation. MATERIALS AND METHODS Eighty Wistar rats (Rattus norvegicus, albinus) were randomly divided into eight groups with 10 hemimaxillae in each of the following: control; bleached (Ble, 35% hydrogen peroxide [H2O2]); Ble-1IRL and Ble-1RL (one IRL [808 nm, 30 s, 3 J] or RL [660 nm, 15 s, 1.5 J] application immediately after H2O2); Ble-3IRL and Ble-3RL (three [immediately, 24 h, and 48 h] IRL or RL applications after H2O2); and 3IRL and 3RL (three IRL or RL applications without bleaching). The rats were euthanized after 2 and 30 days for histological evaluation of inflammation (hematoxylin-eosin) and maturation of collagen fibers (picrosirius red). Additionally, the dentin deposition in the specimens obtained at 30 days was quantified via microtomography of the pulp chamber volume. Statistical analyses were performed (P < 0.05). RESULTS Initially, severe damages to the pulp were observed in the Ble and Ble-1RL groups. Ble-1IRL and Ble-3RL groups showed lower inflammation. The bleached groups had a greater amount of mature collagen fibers than the control group. The Ble-3IRL group had a greater number of immature fibers than the Ble group. At 30 days, there was an absence of inflammation and equal proportion of mature and immature collagen fibers. All bleached groups showed a reduction in the volume of the pulp chamber. CONCLUSION Three consecutive applications of RL and one IRL application can minimize damage to the pulp of bleached teeth, whereas three IRL applications can minimize pulp fibrosis. However, LLLT did not prevent deposition of tertiary dentin. CLINICAL RELEVANCE This study describes LLLT protocols capable of minimizing inflammation and maturation of collagen fibers in pulp tissue after dental bleaching. However, the protocols proved insufficient for reducing the formation of tertiary dentin in bleached teeth.
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Affiliation(s)
- Amanda Miyuki Terayama
- Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Francine Benetti
- Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil.,Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | | | | | | | - Gustavo Sivieri-Araújo
- Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - André Luiz Fraga Briso
- Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
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Abbasi M, Pordel E, Chiniforush N, Firuzjaee SG, Omrani LR. Hydrogen peroxide penetration into the pulp chamber during conventional in-office bleaching and diode laser-assisted bleaching with three different wavelengths. Laser Ther 2019; 28:285-290. [PMID: 32255920 PMCID: PMC7087340 DOI: 10.5978/islsm.19-or-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Accepted: 11/11/2019] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND AIMS Penetration of hydrogen peroxide into the pulp chamber and subsequent tooth hypersensitivity is a common concern in dental bleaching. The aim of this study was to assess the penetration of hydrogen peroxide (H2O2) into the pulp chamber in diode-laser activated bleaching with different laser wavelengths. MATERIALS AND METHODS Fifty extracted human maxillary anterior teeth were collected and divided into five groups(n = 10). Group 1: conventional in-office bleaching using Opalescence Boost gel. Group 2: Bleaching with Biolase Laser White 20 gel activated by 980 nm diode laser. Group 3: Bleaching with Biolase Laser White 20 gel activated by 810 nm diode laser. Group 4: Bleaching with Biolase Laser White 20 gel activated by 940 nm diode laser. Group 5: No bleaching control group.After bleaching, the solution into the pulp chamber was collected and analyzed using a spectrophotometer. The recorded data were compared with a standard sample and the results were analyzed and compared using one-way ANOVA and Tukey's HSD tests. RESULTS In all bleached groups, H2O2 had infiltrated into the pulp chamber. The highest level of penetration was noted in group 2 (2.32 ± 0.25 µg), while the lowest level was noted in group 3 (1.85 ± 0.33 µg). The difference in this regard was significant between groups 2 and 3 (P = 0.024), but the differences between other groups were not statistically significant (P ≥ 0.42). CONCLUSION Considering the results of this study, it can be stated that hydroge peroxide penetration in to pulp chamber in diode laser activation of bleaching agent according to manufactures instruction is not higher than in-office bleaching. The wavelength of diode laser had significant effect on penetration of hydrogen peroxide into pulp chamber.
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Affiliation(s)
- Mahdi Abbasi
- DDS, MSc's, assistant professor, Restorative Dentistry Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Edris Pordel
- Department of Pediatric Dentistry, Borujerd Branch, Islamic Azad University Boroujerd, Iran
| | - Nasim Chiniforush
- Dentist, PhD of laser dentistry, Laser Research Canter of Dentistry, Dental Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Sattar Gorgani Firuzjaee
- DDS. Department of Medical Laboratory Sciences, School of Allied Health Medicine, Aja University of Medical Sciences, Tehran, Iran
| | - Ladan Ranjbar Omrani
- DDS, MSc's, associate professor, Restorative Dentistry Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Clinical analysis of color change and tooth sensitivity to violet LED during bleaching treatment: A case series with split-mouth design. Photodiagnosis Photodyn Ther 2019; 27:59-65. [DOI: 10.1016/j.pdpdt.2019.05.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 05/13/2019] [Accepted: 05/17/2019] [Indexed: 12/21/2022]
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Benetti F, Briso ALF, de Araújo Lopes JM, Carminatti M, Conti LC, Gallinari MO, Ervolino E, Cintra LTA. In vivo analysis of the presence of heme oxygenase-1, transcription factor Jun-D and CD90+/CD73+/CD105+/CD45- cells in the pulp of bleached teeth. Int Endod J 2019; 52:1723-1737. [PMID: 31322737 DOI: 10.1111/iej.13190] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 07/16/2019] [Indexed: 12/27/2022]
Abstract
AIM To investigate hydrogen peroxide (H2 O2 )-induced responsiveness in pulp cells using heme oxygenase-1 (HO-1) immunolabelling, Jun-D immunolabelling to study the effects of H2 O2 on odontoblastic differentiation and CD90+/CD73+/CD105+/CD45- cell counting for in vivo identification of mesenchymal stem cells in the pulp. METHODOLOGY The maxillary molars of 50 rats were treated with a bleaching gel (35% H2 O2 , 1 × 30 min) or placebo gel (control groups). At 2, 3, 7, 15 and 30 days after the treatment (n = 10), inflammation in pulp tissue was analysed by haematoxylin-eosin staining, HO-1- and Jun-D-immunolabelled cells were counted in each third of the pulp chamber, and the number of CD90+/CD73+/CD105+/CD45- cells was quantified by immunofluorescence. The results were assessed using the Paired t-test or Wilcoxon signed-rank test (P < 0.05). RESULTS Significant H2 O2 -induced inflammation was noted at 2 and 3 days (P < 0.05), with tertiary dentine formation occurring from 7 days. The bleached specimens had greater HO-1 immunolabelling in the middle and cervical thirds of the coronal pulp at 2 and 3 days, in all thirds at 7 days, and in the occlusal third at 15 days (P < 0.05), and significant nuclear Jun-D immunolabelling in the cervical third at 2 and 3 days and in the occlusal and middle thirds at 7 days (P < 0.05). Bleached and control groups had low numbers of CD90+/CD73+/CD105+/CD45- cells in the pulp at all periods (P > 0.05). CONCLUSIONS Pulp cells responded to oxidative stress by expressing HO-1 during the post-bleaching inflammation phase until the beginning of the repair phase. Jun-D expression occurred during the reduction of inflammation and the beginning of tertiary dentine production. The presence of oxidative stress did not influence the number of CD90+/CD73+/CD105+/CD45- cells identified in vivo in the dental pulp.
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Affiliation(s)
- F Benetti
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil.,Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - A L F Briso
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - J M de Araújo Lopes
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - M Carminatti
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - L C Conti
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - M O Gallinari
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - E Ervolino
- Department of Basic Science, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - L T A Cintra
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
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Soares DG, Marcomini N, Duque CCDO, Bordini EAF, Zuta UO, Basso FG, Hebling J, Costa CADS. Increased whitening efficacy and reduced cytotoxicity are achieved by the chemical activation of a highly concentrated hydrogen peroxide bleaching gel. J Appl Oral Sci 2019; 27:e20180453. [PMID: 31411261 DOI: 10.1590/1678-7757-2018-0453] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 11/28/2018] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE This study was designed for the chemical activation of a 35% hydrogen peroxide (H2O2) bleaching gel to increase its whitening effectiveness and reduce its toxicity. METHODOLOGY First, the bleaching gel - associated or not with ferrous sulfate (FS), manganese chloride (MC), peroxidase (PR), or catalase (CT) - was applied (3x 15 min) to enamel/dentin discs adapted to artificial pulp chambers. Then, odontoblast-like MDPC-23 cells were exposed for 1 h to the extracts (culture medium + components released from the product), for the assessment of viability (MTT assay) and oxidative stress (H2DCFDA). Residual H2O2 and bleaching effectiveness (DE) were also evaluated. Data were analyzed with one-way ANOVA complemented with Tukey's test (n=8. p<0.05). RESULTS All chemically activated groups minimized MDPC-23 oxidative stress generation; however, significantly higher cell viability was detected for MC, PR, and CT than for plain 35% H2O2 gel. Nevertheless, FS, MC, PR, and CT reduced the amount of residual H2O2 and increased bleaching effectiveness. CONCLUSION Chemical activation of 35% H2O2 gel with MC, PR, and CT minimized residual H2O2 and pulp cell toxicity; but PR duplicated the whitening potential of the bleaching gel after a single 45-minute session.
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Affiliation(s)
- Diana Gabriela Soares
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Odontológicos, Bauru, São Paulo, Brasil
| | - Natália Marcomini
- Universidade Estadual Paulista - UNESP, Faculdade de Odontologia de Araraquara, Departamento de Dentística Restauradora, Araraquara, São Paulo, Brasil
| | - Carla Caroline de Oliveira Duque
- Universidade Estadual Paulista - UNESP, Faculdade de Odontologia de Araraquara, Departamento de Materiais Dentários e Prótese, Araraquara, São Paulo, Brasil
| | - Ester Alves Ferreira Bordini
- Universidade Estadual Paulista - UNESP, Faculdade de Odontologia de Araraquara, Departamento de Materiais Dentários e Prótese, Araraquara, São Paulo, Brasil
| | - Uxua Ortecho Zuta
- Universidade Estadual Paulista - UNESP, Faculdade de Odontologia de Araraquara, Departamento de Materiais Dentários e Prótese, Araraquara, São Paulo, Brasil
| | - Fernanda Gonçalves Basso
- Universidade Estadual Paulista - UNESP, Faculdade de Odontologia de Araraquara, Departamento de Fisiologia e Patologia, Araraquara, São Paulo, Brasil
| | - Josimeri Hebling
- Universidade Estadual Paulista - UNESP, Faculdade de Odontologia de Araraquara, Departamento de Clínica Infantil, Araraquara, São Paulo, Brasil
| | - Carlos Alberto de Souza Costa
- Universidade Estadual Paulista - UNESP, Faculdade de Odontologia de Araraquara, Departamento de Fisiologia e Patologia, Araraquara, São Paulo, Brasil
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Barbosa JG, Benetti F, de Oliveira Gallinari M, Carminatti M, da Silva ABD, Lopes INI, Briso ALF, Cintra LTA. Bleaching gel mixed with MI Paste Plus reduces penetration of H 2O 2 and damage to pulp tissue and maintains bleaching effectiveness. Clin Oral Investig 2019; 24:1299-1309. [PMID: 31302769 DOI: 10.1007/s00784-019-03009-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 07/03/2019] [Indexed: 02/07/2023]
Abstract
OBJECTIVES MI Paste Plus remineralizer (Rem) strengthens dental structures after bleaching. We investigated the effect of Rem on the penetration of hydrogen peroxide (H2O2), bleaching effectiveness, and pulp inflammation after bleaching. MATERIALS AND METHODS Bovine disks were grouped as follows (n = 10): control (untreated), bleached (Ble; 35% H2O2, 30 min), Ble-Rem (H2O2 followed by Rem, 30 min), Rem-Ble (Rem followed by H2O2), Rem-Ble-Rem (Rem before and after H2O2), and Ble+Rem (mixture of Rem with H2O2, 1:1, 30 min). The penetration of H2O2 was quantified and bleaching efficacy was analyzed. Upper rat molars (n = 10) received the same treatments at random. The rats were euthanized after two days and 30 days, and their jaws were removed for histological analysis. Statistical tests were performed (P < 0.05). RESULTS The bleached groups, except Ble+Rem (P > 0.05), showed significant H2O2 penetration compared with control (P < 0.05). Color alteration analysis showed that ΔL and ΔE were significantly higher in the bleached groups than those in control (P < 0.05); the Δb of the bleached groups differed from that of control at 24 h (P < 0.05). At two days, necrosis or inflammation was observed in the bleached groups compared with control (P < 0.05), except Ble+Rem, which was similar to control (P > 0.05). At 30 days, tertiary dentin formation was significant in the bleached groups (P < 0.05), except Ble+Rem (P > 0.05). CONCLUSION The mixture of MI Paste Plus and bleaching gel reduces H2O2 penetration and pulp damage and maintains bleaching effectiveness. CLINICAL RELEVANCE Because bleaching can damage dental tissues, we studied a new bleaching protocol that reduces damage to the pulp tissue while maintaining bleaching efficiency: a single application of 30 min of MI Paste Plus mixed with 35% H2O2 bleaching gel (1:1).
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Affiliation(s)
- Jéssica Galbiati Barbosa
- Department of Endodontics, São Paulo State University (Unesp), School of Dentistry, Araçatuba, SP, Brazil
| | - Francine Benetti
- Department of Endodontics, São Paulo State University (Unesp), School of Dentistry, Araçatuba, SP, Brazil
- Restorative Dentistry, School of Dentistry, UFMG - Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Marina Carminatti
- Department of Endodontics, São Paulo State University (Unesp), School of Dentistry, Araçatuba, SP, Brazil
| | - Anna Beatriz Dias da Silva
- Department of Endodontics, São Paulo State University (Unesp), School of Dentistry, Araçatuba, SP, Brazil
| | | | - André Luiz Fraga Briso
- Department of Restorative Dentistry, São Paulo State University (Unesp), School of Dentistry, Araçatuba, SP, Brazil
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Llena C, Collado-González M, García-Bernal D, Oñate-Sánchez RE, Martínez CM, Moraleda JM, Rodríguez-Lozano FJ, Forner L. Comparison of diffusion, cytotoxicity and tissue inflammatory reactions of four commercial bleaching products against human dental pulp stem cells. Sci Rep 2019; 9:7743. [PMID: 31123303 PMCID: PMC6533274 DOI: 10.1038/s41598-019-44223-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 05/08/2019] [Indexed: 12/23/2022] Open
Abstract
Multiple side effects related to bleaching were found to occur in the dental pulp tissue, including decreased cell metabolism and viability. In this work we evaluated the in vitro diffusion capacity, cytotoxicity and biocompatibility of four commercial bleaching products on stem cells from human dental pulp (hDPSCs). Two commercial bleaching gels hydrogen peroxide-based (HP), Norblanc Office 37.5% (Nor-HP) and Opalescence Boost 40% (Opal-HP) were applied for 30 min to enamel/dentine discs. Another two gels from the same manufacturers, 16% carbamide peroxide-based (CP), Norblanc Home (Nor-CP) and Opalescence CP 16% (Opal-CP), were applied for 90 min. The diffusion of HP was analysed by fluorometry. Cytotoxicity was determined using the MTT assays, the determination of apoptosis, immunofluorescence assays and intracellular reactive oxygen species (ROS) level. Tissue inflammatory reactions were evaluated histopathologically in rats. Statistical differences were performed by one-way ANOVA and Bonferroni post-test (α < 0.05). Normon products showed lower cytotoxicity and diffusion capacity than the Ultradent products. A high intracellular ROS level was measured in hDPSCs after exposure to Opal-HP. Finally, a severe necrosis of both coronal and radicular pulp was observed with Opal-HP. Similar concentrations of hydrogen peroxide and carbamide peroxide in a variety of bleaching products exhibited different responses in cells and dental pulp tissue, suggesting that bleaching products contain unknown agents that could influence their toxicity.
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Affiliation(s)
- C Llena
- Department of Stomatology, Universitat de València, Valencia, Spain
| | - M Collado-González
- Department of Stomatology, Universitat de València, Valencia, Spain.,Unit of Special Care in Dentistry and Cell Therapy and Hematopoietic Transplant Unit, Internal Medicine Department, IMIB-Arrixaca, University of Murcia, Murcia, Spain
| | - D García-Bernal
- Unit of Special Care in Dentistry and Cell Therapy and Hematopoietic Transplant Unit, Internal Medicine Department, IMIB-Arrixaca, University of Murcia, Murcia, Spain
| | - R E Oñate-Sánchez
- Unit of Special Care in Dentistry and Cell Therapy and Hematopoietic Transplant Unit, Internal Medicine Department, IMIB-Arrixaca, University of Murcia, Murcia, Spain
| | - C M Martínez
- Experimental Pathology Unit, IMIB-Arrixaca, University of Murcia, Murcia, Spain
| | - J M Moraleda
- Unit of Special Care in Dentistry and Cell Therapy and Hematopoietic Transplant Unit, Internal Medicine Department, IMIB-Arrixaca, University of Murcia, Murcia, Spain
| | - F J Rodríguez-Lozano
- Unit of Special Care in Dentistry and Cell Therapy and Hematopoietic Transplant Unit, Internal Medicine Department, IMIB-Arrixaca, University of Murcia, Murcia, Spain.
| | - L Forner
- Department of Stomatology, Universitat de València, Valencia, Spain
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35
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Benetti F, Briso ALF, Ferreira LL, Carminatti M, Álamo L, Ervolino E, Dezan-Júnior E, Cintra LTA. In Vivo Study of the Action of a Topical Anti-Inflammatory Drug In Rat Teeth Submitted To Dental Bleaching. Braz Dent J 2019; 29:555-561. [PMID: 30517478 DOI: 10.1590/0103-6440201802177] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 07/13/2018] [Indexed: 12/11/2022] Open
Abstract
Bleaching gel containing hydrogen peroxide (H2O2) cause damages in pulp tissue. This study investigated the action of a topical anti-inflammatory, the Otosporin®, in rats' bleached teeth with the null hypothesis of which the Otosporin® is no able to minimize the pulp inflammation that bleaching gel generates. The rat's molars were divided into groups: BLE: bleached (35% H2O2 concentration /single application of 30 min); BLE-O: bleached followed by Otosporin® (10 min); and control: placebo gel. In the second day after dental bleaching, the rats were killed, and the jaws were processed for hematoxylin-eosin and immunohistochemistry analysis for tumor necrosis factor alpha (TNF-α), interleukin (IL)-6 and IL-17. The data collected were subjected to Kruskal-Wallis and Dunn statistical tests with at a 5% level of significance (p<0.05). The BLE group had moderate to strong inflammation in the occlusal third of the coronary pulp, with necrotic areas; and BLE-O, mild inflammation (p<0.05). There was a significant difference in the occlusal and middle thirds of the coronary pulp between the BLE with BLE-O and control groups (p<0.05). There was no difference in the cervical third (p>0.05). The BLE group had a high immunoexpression of TNF-α than BLE-O and control groups (p<0.05), with moderate and mild immunoexpression, respectively. Regarding IL-6 and IL-17, the BLE group had higher immunoexpression than control (p<0.05); the BLE-O was similar to the control (p>0.05). The topical anti-inflammatory Otosporin® can reduce pulp inflammation after dental bleaching in the rat teeth.
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Affiliation(s)
- Francine Benetti
- Endodontics, Araçatuba Dental School, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
| | - André Luiz Fraga Briso
- Restorative Dentistry, Araçatuba Dental School, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
| | - Luciana Louzada Ferreira
- Endodontics, Araçatuba Dental School, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
| | - Marina Carminatti
- Endodontics, Araçatuba Dental School, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
| | - Larissa Álamo
- Endodontics, Araçatuba Dental School, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
| | - Edilson Ervolino
- Basic Science, Araçatuba Dental School, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
| | - Eloi Dezan-Júnior
- Endodontics, Araçatuba Dental School, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
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Dias FCR, Martins ALP, de Melo FCSA, Cupertino MDC, Gomes MDLM, de Oliveira JM, Damasceno EM, Silva J, Otoni WC, da Matta SLP. Hydroalcoholic extract of Pfaffia glomerata alters the organization of the seminiferous tubules by modulating the oxidative state and the microstructural reorganization of the mice testes. JOURNAL OF ETHNOPHARMACOLOGY 2019; 233:179-189. [PMID: 30605740 DOI: 10.1016/j.jep.2018.12.047] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 12/29/2018] [Accepted: 12/29/2018] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL USAGES Leaves and roots of Pfaffia glomerata areused as aphrodisiacs, tranquilizers and antirheumatics. Due to the lack of experimental scientific data, studies are necessary to identify its medicinal properties. AIMS The present study aimed to evaluate the effect of hydroalcoholic root extract of P. glomerata (Brazilian ginseng extract - BGE) on testicular parenchyma, and evaluate possible harmful effects through testicular oxidative stress analysis. MATERIALS AND METHODS Adult mice were divided into 6 groups: control (water), sildenafil citrate, BGE (100, 200 and 400 mg/kg/day), and BGE (200 mg/kg every three days). RESULTS The treatment reduced the volumetric proportions of seminiferous tubules and epithelium, the number of Sertoli cells, and increased hydrogen peroxide levels, without affecting sperm production. It also caused cell death and changes in the frequency of stages of the seminiferous epithelium cycles. The 100 mg/kg dose responds in a similar way to sildenafil citrate, promoting changes in the gonadal structure, but with efficient response to contain the damage. CONCLUSIONS Doses of 200 mg/kg, continuous or discontinuous, induced an increase in testicular nitric oxide, as well as sildenafil citrate, showing be efficient as aphrodisiac, but promotes cell death regardless of the form of administration.
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Affiliation(s)
| | | | | | | | | | | | | | - Janaina Silva
- Department of General Biology, Federal University of Viçosa, Viçosa/MG, Brazil
| | - Wagner Campos Otoni
- Department of Plant Biology, Federal University of Viçosa, Viçosa/MG, Brazil
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Huang S, Zheng B, Jin X, Yu Q, Zhang X, Sun X, Chen Y, Ren X, Wismeijer D, Ma J, Zhang C, Wu G, Pan Y. Blockade of Cyclophilin D Attenuates Oxidative Stress-Induced Cell Death in Human Dental Pulp Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:1729013. [PMID: 31089403 PMCID: PMC6476071 DOI: 10.1155/2019/1729013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 01/03/2019] [Accepted: 02/16/2019] [Indexed: 12/13/2022]
Abstract
Pathological stimuli, such as bacterial activity, dental bleaching, and nonpolymerized resin monomers, can cause death of dental pulp cells (DPCs) through oxidative stress- (OS-) induced mitochondrial dysfunction. However, the crucial molecular mechanisms that mediate such a phenomenon remain largely unknown. OS is characterized by the overproduction of reactive oxygen species (ROS), e.g., H2O2, O2 -, and ·OH. Mitochondria are a major source of ROS and the principal attack target of ROS. Cyclophilin D (CypD), as the only crucial protein for mitochondrial permeability transition pore (mPTP) induction, facilitates the opening of mPTP and causes mitochondrial dysfunction, leading to cell death. In the present study, we hypothesized that CypD-mediated mitochondrial molecular pathways were closely involved in the process of OS-induced death of human DPCs (HDPCs). We tested the phenotypic and molecular changes of HDPCs in a well-established OS model-H2O2 treatment. We showed that H2O2 dramatically reduced the viability and increased the death of HDPCs in a time- and dose-dependent manner by performing MTT, flow cytometry, and TUNEL assays and quantifying the expression changes of Bax and Bcl-2 proteins. H2O2 also induced mitochondrial dysfunction, as reflected by the increased mitochondrial ROS, reduced ATP production, and activation of mPTP (decreased mitochondrial membrane potential and enhanced intracellular Ca2+ level). An antioxidant (N-acetyl-L-cysteine) effectively preserved mitochondrial function and significantly attenuated H2O2-induced cytotoxicity and death. Moreover, H2O2 treatment markedly upregulated the CypD protein level in HDPCs. Notably, genetic or pharmacological blockade of CypD significantly attenuated H2O2-induced mitochondrial dysfunction and cell death. These findings provided novel insights into the role of a CypD-dependent mitochondrial pathway in the H2O2-induced death in HDPCs, indicating that CypD may be a potential therapeutic target to prevent OS-mediated injury in dental pulp.
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Affiliation(s)
- Shengbin Huang
- Department of Prosthodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, Netherlands
| | - Bingbing Zheng
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Xing Jin
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Qihao Yu
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Xiaorong Zhang
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Xiaoyu Sun
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Yuting Chen
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Xuerui Ren
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Daniel Wismeijer
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, Netherlands
| | - Jianfeng Ma
- Department of Prosthodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Chengfei Zhang
- Comprehensive Dental Care, Endodontics, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong
| | - Gang Wu
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, Netherlands
| | - Yihuai Pan
- Institute of Stomatology, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
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38
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Louzada LM, Briso ALF, Benetti F, Vieira LB, de Castilho Jacinto R, Dezan-Júnior E, Cintra LTA. Anti-inflammatory potential of a carvedilol gel in the pulpal tissue of rats after dental bleaching: A histopathological evaluation. JOURNAL OF INVESTIGATIVE AND CLINICAL DENTISTRY 2019; 10:e12401. [PMID: 30693672 DOI: 10.1111/jicd.12401] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/02/2018] [Accepted: 12/07/2018] [Indexed: 12/01/2022]
Abstract
AIM Carvedilol is an antioxidant that decreases inflammation in periodontitis. The hydrogen peroxide (H2 O2 ) of bleaching gel causes inflammation and necrosis of the dental pulp. In the present study, we evaluated the anti-inflammatory potential of carvedilol in the pulp of rats after bleaching. METHODS The right upper molars of rats received 35% H2 O2 (1× 30 minutes), and the left upper molars were used as the control. Half of the rats received carvedilol gel (1× 10 minutes), forming the following groups: bleached, bleached followed by carvedilol (bleached+carvedilol), and control. After 2 and 30 days (N = 7 hemi-maxillae/group), the rats were killed for histological evaluation, and statistical tests were performed (P < 0.05). RESULTS After 2 days, the bleached group showed necrosis in the occlusal third of the coronal pulp, and in the bleached+carvedilol group, severe inflammation (P > 0.05), both different from the control (P < 0.05). In the middle third, the bleached group showed severe inflammation, and the bleached+carvedilol group showed moderate inflammation (P > 0.05), with the only difference between the bleached and control groups (P < 0.05). In the cervical third, the bleached group showed moderate inflammation, and the bleached+carvedilol group showed mild inflammation (P > 0.05). The difference again was only between the bleached and control groups (P < 0.05). At 30 days, there was no inflammation and a marked amount of tertiary dentin in bleached teeth (P > 0.05). CONCLUSION Carvedilol gel has the potential of minimizing H2 O2 damage, especially in deep regions of the dental pulp of rats after bleaching.
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Affiliation(s)
- Lidiane M Louzada
- School of Dentistry, São Paulo State University (Unesp), Araçatuba, São Paulo, Brazil
| | - André L F Briso
- School of Dentistry, São Paulo State University (Unesp), Araçatuba, São Paulo, Brazil
| | - Francine Benetti
- School of Dentistry, São Paulo State University (Unesp), Araçatuba, São Paulo, Brazil
| | - Letícia B Vieira
- School of Dentistry, São Paulo State University (Unesp), Araçatuba, São Paulo, Brazil
| | | | - Elói Dezan-Júnior
- School of Dentistry, São Paulo State University (Unesp), Araçatuba, São Paulo, Brazil
| | - Luciano T A Cintra
- School of Dentistry, São Paulo State University (Unesp), Araçatuba, São Paulo, Brazil
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Gallinari MDO, Cintra LTÂ, Benetti F, Rahal V, Ervolino E, Briso ALF. Pulp response of rats submitted to bleaching and the use of different anti-inflammatory drugs. PLoS One 2019; 14:e0210338. [PMID: 30620760 PMCID: PMC6324791 DOI: 10.1371/journal.pone.0210338] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 12/20/2018] [Indexed: 11/19/2022] Open
Abstract
This study aimed to evaluate neuropeptide expression after bleaching treatment using histopathological and immunohistochemical analyses and the effects of hydrocortisone and acetaminophen on pulp inflammation, sine dental bleaching and inflammation first occur, and only then, the treatmentt. Sixty-three rats were divided into three groups (n = 21) according to the pain-relieving therapy used: I-control; II-topical application of Otosporin for 10 min after the bleaching treatment; III-oral administration of paracetamol 30 min before whitening and then every 12h. In all the study groups, placebo gel was applied to the left upper jaw (control) and a 35% H2O2-based whitening gel was applied to the right upper jaw for 45 min. Seven animals from each group were euthanized at different time points: 0h after treatment, 24h, and 48h. After euthanasia, the first molar on each side was analyzed by histology and immunohistochemistry to assess the degree of inflammation and verify the presence of the neuropeptides, substance P (SP) and calcitonin gene-related peptide (CGRP). The data were analyzed using the statistical nonparametric Kruskal-Wallis test followed by Dunn's test for individual comparisons. Extensive areas of necrosis were observed in the groups that received bleaching treatment only, whereas reduced damage were obtained in the group treated with Otosporin. The immunohistochemical analysis showed positive immunolabeling in all groups, including the control, but this was stronger in the groups that received bleaching treatment. The best results were obtained in the group that received treatment with Otosporin. The use of Otosporin after dental bleaching minimized the side effects of this treatment.
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Affiliation(s)
- Marjorie de Oliveira Gallinari
- Department of Restorative Dentistry, Araçatuba Dental School, UNESP—Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Luciano Tavares Ângelo Cintra
- Department of Restorative Dentistry, Araçatuba Dental School, UNESP—Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Francine Benetti
- Department of Restorative Dentistry, Araçatuba Dental School, UNESP—Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Vanessa Rahal
- Department of Restorative Dentistry, Araçatuba Dental School, UNESP—Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Edilson Ervolino
- Department of Basic Sciences, Araçatuba Dental School, UNESP—Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - André Luiz Fraga Briso
- Department of Restorative Dentistry, Araçatuba Dental School, UNESP—Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
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Benetti F, Briso ALF, Carminatti M, de Araújo Lopes JM, Barbosa JG, Ervolino E, Gomes-Filho JE, Cintra LTA. The presence of osteocalcin, osteopontin and reactive oxygen species-positive cells in pulp tissue after dental bleaching. Int Endod J 2018; 52:665-675. [PMID: 30488465 DOI: 10.1111/iej.13049] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 11/23/2018] [Indexed: 01/24/2023]
Abstract
AIM To analyse the influence of H2 O2 on pulp repair through osteocalcin and osteopontin immunolabelling and in cellular defence by using the antireactive oxygen species (ROS) antibody. METHODOLOGY The maxillary molars of 50 rats were treated with 35% H2 O2 (Ble groups) or placebo gel (control groups). At 0 h and 2, 7, 15 and 30 days (n = 10 hemimaxillae), the rats were killed and pulp tissue was evaluated using inflammation and immunolabelling scores (osteocalcin/osteopontin); ROS-positive cells were counted. Paired t-test and Wilcoxon signed-rank test were used (P < 0.05). RESULTS The Ble group had necrosis in the coronal pulp at 0 h and in the occlusal third of the coronal pulp at 2 days; at 7, 15 and 30 days, no inflammation was noted similar to the controls (P > 0.05). Osteocalcin was absent in the Ble at 0 h, moderate at 2 days and increased thereafter, differing from the controls at all two periods (P < 0.05). Osteopontin was higher principally at 7 and 15 days in Ble groups, but differing with control groups from 2 days after bleaching (P < 0.05). The Ble group had more ROS-positive cells in the pulp at 7 and 15 days (P < 0.05). Tertiary dentine was observed at 7 days, increasing thereafter (P < 0.05). CONCLUSIONS Post-bleaching pulp repair was associated with increased osteocalcin over time. Osteopontin also participated in this process, and anti-ROS was involved in cellular defence against H2 O2 .
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Affiliation(s)
- F Benetti
- Department of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - A L F Briso
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - M Carminatti
- Department of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - J M de Araújo Lopes
- Department of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - J G Barbosa
- Department of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - E Ervolino
- Department of Basic Science, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - J E Gomes-Filho
- Department of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - L T A Cintra
- Department of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
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The effects of hybrid light activation and enamel acid etching on the effectiveness, stability and sensitivity after a single session in-office bleaching: A 12-month clinical trial. Photodiagnosis Photodyn Ther 2018; 24:22-26. [DOI: 10.1016/j.pdpdt.2018.08.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 08/07/2018] [Accepted: 08/13/2018] [Indexed: 02/07/2023]
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de Paula B, Alencar C, Ortiz M, Couto R, Araújo J, Silva C. Effect of photobiomodulation with low-level laser therapy combined with potassium nitrate on controlling post-bleaching tooth sensitivity: clinical, randomized, controlled, double-blind, and split-mouth study. Clin Oral Investig 2018; 23:2723-2732. [PMID: 30361793 DOI: 10.1007/s00784-018-2715-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 10/17/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To evaluate the effect of photobiomodulation with low-level laser therapy (PBM-LLLT) combined with 5% potassium nitrate (KNO3) on controlling tooth sensitivity (TS) after in-office tooth bleaching. MATERIALS AND METHODS Fifty volunteers were selected based on the inclusion and exclusion criteria and were randomly allocated into four groups: G1 (control): placebo gel application, 35% hydrogen peroxide bleaching (HP35) and mock PBM-LLLT without light emission; G2: placebo gel application, bleaching with HP35 and PBM-LLLT; G3: application of KNO3, bleaching with HP35 and mock PBM-LLLT; and G4: application of KNO3, bleaching with HP35 and PBM-LLLT. A pain assessment questionnaire was used to evaluate TS during the 21 days of treatment. The Friedman test was used for intragroup analysis, and the Wilcoxon and Mann-Whitney tests were used for intergroup comparisons. RESULTS The intragroup evaluation showed significant differences among the evaluation times in all groups (p ≤ 0.05). The highest pain sensitivity levels were recorded on the 1st, 8th, and 15th days. In G1, TS manifested for up to 3 days after each bleaching session, while G2, G3, and G4 presented TS only on the days of the bleaching sessions. Intergroup analysis showed that TS manifestation differed significantly between G1 and the other groups (p ≤ 0.05) but did not differ significantly among G2, G3, and G4 (p ≥ 0.05). CONCLUSION PBM-LLLT and KNO3 are effective at reducing pain sensitivity after tooth bleaching, but no synergistic effect between these treatments was observed for the different evaluation periods. CLINICAL RELEVANCE The effect of PBM-LLLT combined with KNO3 on post-bleaching tooth sensitivity is similar to their individual use alone.
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Affiliation(s)
- Brennda de Paula
- Graduate Program in Dentistry, Federal University of Pará, Belém, PA, Brazil
| | - Cristiane Alencar
- Graduate Program in Dentistry, Federal University of Pará, Belém, PA, Brazil
| | - Mariángela Ortiz
- Graduate Program in Dentistry, Federal University of Pará, Belém, PA, Brazil
| | - Roberta Couto
- Graduate Program in Dentistry, Federal University of Pará, Belém, PA, Brazil
| | - Jesuína Araújo
- School of Dentistry, Federal University of Pará, Belém, PA, Brazil
| | - Cecy Silva
- Graduate Program in Dentistry, Federal University of Pará, Belém, PA, Brazil. .,Faculdade de Odontologia, Universidade Federal do Pará, Avenida Augusto Correa, no 1, Guamá, Belém, PA, 66075-110, Brazil.
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Human Dental Pulp Stem Cells Exhibit Different Biological Behaviours in Response to Commercial Bleaching Products. MATERIALS 2018; 11:ma11071098. [PMID: 29954139 PMCID: PMC6073762 DOI: 10.3390/ma11071098] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 06/13/2018] [Accepted: 06/22/2018] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to evaluate the diffusion capacity and the biological effects of different bleaching products on human dental pulp stem cells (hDPSCs). The bleaching gel was applied for 90, 30 or 15 min to enamel/dentine discs that adapted in an artificial chamber. The diffusion of hydrogen peroxide (HP) was analysed by fluorometry and the diffusion products were applied to hDPSCs. Cell viability, cell migration and cell morphology assays were performed using the eluates of diffusion products. Finally, cell apoptosis and the expression of mesenchymal stem cell markers were analysed by flow cytometry. Statistical analysis was performed using analysis of variance and Kruskal⁻Wallis or Mann⁻Whitney tests (α < 0.05). Significant reductions of approximately 95% in cell viability were observed for the 3 × 15 min groups (p < 0.001), while 1 × 30 min of PerfectBleach and 1 × 90 min of PolaNight resulted in reductions of 50% and 60% in cell viability, respectively (p < 0.001). Similar results were obtained in the migration assay. Moreover, the 3 × 15 min group was associated with cell morphology alterations and reductions of >70% in cell live. Finally, hDPSCs maintained their mesenchymal phenotype in all conditions. Similar concentrations of carbamide peroxide (CP) and HP in different commercial products exhibited different biological effects on hDPSCs.
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Grazioli G, Valente LL, Isolan CP, Pinheiro HA, Duarte CG, Münchow EA. Bleaching and enamel surface interactions resulting from the use of highly-concentrated bleaching gels. Arch Oral Biol 2018; 87:157-162. [DOI: 10.1016/j.archoralbio.2017.12.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/21/2017] [Accepted: 12/27/2017] [Indexed: 10/18/2022]
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Benetti F, Gomes-Filho JE, Ferreira LL, Sivieri-Araújo G, Ervolino E, Briso ALF, Cintra LTA. Concentration-dependent effect of bleaching agents on the immunolabelling of interleukin-6, interleukin-17 and CD5-positive cells in the dental pulp. Int Endod J 2018; 51:789-799. [PMID: 29352770 DOI: 10.1111/iej.12891] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 01/12/2018] [Indexed: 01/02/2023]
Abstract
AIM To evaluate lymphocyte-like cell activation (CD5-positive cells) and the expression of interleukin (IL)-6 and IL-17 in the pulp after tooth bleaching with two concentrations of hydrogen peroxide (H2 O2 ). METHODOLOGY The right and left maxillary molars from 40 rats were treated randomly with bleaching gel with 20% H2 O2 (BLUE group, 1 application of 50 min), 35% H2 O2 (MAXX group, three applications of 15 min), or placebo gel (control). After 2 and 30 days, the rats were killed (n = 10), and the jaws were processed for histological and immunohistochemistry analysis of the pulp tissue. The scores of inflammation and immunolabelling (IL-6/IL-17) were submitted to Mann-Whitney and Kruskal-Wallis followed Dunn tests, respectively; anova tests were used for comparisons of number of CD5-positive cells and pulp chamber area values (P < 0.05). RESULTS At 2 days, 60% of specimens of the BLUE group were associated with moderate inflammation in pulp horns, and in the MAXX group with necrosis (P < 0.05). At 30 days, the pulp was organized, and tertiary dentine was formed. The MAXX group had superior immunolabelling of IL-17 at 2 days differing significantly from other groups (P < 0.05). At 2 days, 90% of the specimens of the BLUE group had moderate immunolabelling of IL-6, and 50% of the MAXX group had severe immunolabelling, both significantly different from the control (P < 0.05). There was no significant difference between the groups at 30 days (P > 0.05). CD5-positive cells were present at 2 and 30 days, particularly in the bleached groups (P < 0.05), without significant difference between time periods (P > 0.05). CONCLUSIONS IL-6 and IL-17 participated in inflammation in the pulp tissue of rats after tooth bleaching, particularly at 2 days. The immunolabelling was greater with increasing H2 O2 concentration. This process was accompanied by the prolonged activation of CD5-positive cells.
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Affiliation(s)
- F Benetti
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - J E Gomes-Filho
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - L L Ferreira
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - G Sivieri-Araújo
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - E Ervolino
- Department of Basic Science, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - A L F Briso
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - L T A Cintra
- Department of Endodontics, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
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Influence of different types of light on the response of the pulp tissue in dental bleaching: a systematic review. Clin Oral Investig 2017; 22:1825-1837. [PMID: 29230545 DOI: 10.1007/s00784-017-2278-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 11/19/2017] [Indexed: 12/11/2022]
Abstract
OBJECTIVES This systematic review (PROSPERO register: CRD42016053140) investigated the influence of different types of light on the pulp tissue during dental bleaching. MATERIALS AND METHODS Two independent authors conducted a systematic search and risk of bias evaluations. An electronic search was undertaken (PubMed/Medline, Embase, The Cochrane Library, and other databases) until May 2017. The population, intervention, comparison, outcomes (PICO) question was: "Does the light in dental bleaching change the response of the pulp to the bleaching procedure?" The intervention involved pulp tissue/cells after bleaching with light, while the comparison involved pulp tissue/cells after bleaching without light. The primary outcome was the inflammation/cytotoxicity observed in pulp after bleaching. RESULTS Out of 2210 articles found, 12 articles were included in the review; four were in vivo studies (one study in dogs/others in human), and eight were in vitro studies (cell culture/with artificial pulp chamber or not). The light source used was halogen, light-emitting diode (LED), and laser. Only one in vivo study that used heat to simulate light effects showed significant pulp inflammation. Only two in vitro studies demonstrated that light influenced cell metabolism; one using halogen light indicated negative effects, and the other using laser therapy indicated positive effects. Given that animal and in vitro studies have been identified, there remain some limitations for extrapolation to the human situation. Furthermore, different light parameters were used. CONCLUSIONS The effects of dental bleaching on the pulp are not influenced by different types of light, but different light parameters can influence these properties. CLINICAL RELEVANCE There is insufficient evidence about the influence of different types of light on inflammation/cytotoxicity of the pulp.
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Ferreira LL, Gomes-Filho JE, Benetti F, Carminatti M, Ervolino E, Briso ALF, Cintra LTA. The effect of dental bleaching on pulpal tissue response in a diabetic animal model: a study of immunoregulatory cytokines. Int Endod J 2017; 51:347-356. [PMID: 28857196 DOI: 10.1111/iej.12852] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Accepted: 08/25/2017] [Indexed: 12/20/2022]
Abstract
AIM To evaluate the influence of tooth bleaching on immunoregulatory cytokines production (IL-6, Tumour necrosis factor (TNF)-α and IL-17) in the pulp tissue of normoglycaemic and diabetic rats. METHODOLOGY Twenty-eight rats were divided into normoglycaemic and diabetic rats (n = 14). Diabetes mellitus (DM) was induced with a single dose of alloxan diluted in citrate buffer via intramuscular injection. After DM confirmation, all rats were sedated and tooth bleaching was performed using 35% hydrogen peroxide on the right maxillary molars for 30 min. Left molars were used as controls. Bleaching resulted in four hemimaxillae groups: normoglycaemic (N), N-bleached (NBle), diabetic (D) and D-bleached (DBle). After 2 and 30 days, rats were euthanized and hemimaxillae processed for analysis by haematoxylin and eosin and immunohistochemistry. Results within and between animals were submitted to Wilcoxon signed-rank and Mann-Whitney tests (P < 0.05). RESULTS At 2 days, the NBle group had mild, and the DBle had severe inflammatory infiltration in the pulpal tissue (P < 0.05). TNF-α and IL-6 cytokines were associated with increased immunolabelling in the bleached groups compared to nonbleached (P < 0.05). However, IL-17 had increased immunolabelling in the NBle compared to the N and DBle group (P < 0.05). At 30 days, reactionary dentine was observed in the coronal pulp of all bleached teeth and no inflammation was present (P > 0.05). TNF-α cytokines had increased immunolabelling in the DBle group compared to the D group (P < 0.05). However, for IL-6 and IL-17, no difference was observed in this period (P > 0.05). CONCLUSIONS Tooth bleaching increased IL-6 and TNF-α in the pulp tissue regardless of diabetes mellitus; however, diabetic rats had higher TNF-α levels for longer periods. Tooth bleaching influenced the increase in IL-17 in the early periods in normoglycaemic rats.
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Affiliation(s)
- L L Ferreira
- Departments of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - J E Gomes-Filho
- Departments of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - F Benetti
- Departments of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - M Carminatti
- Departments of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - E Ervolino
- Department of Basic Science, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - A L F Briso
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
| | - L T A Cintra
- Departments of Endodontics, School of Dentistry, São Paulo State University (Unesp), Araçatuba, SP, Brazil
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