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Carneiro TDS, Favoreto MW, Rodrigues JPF, Sutil E, Centenaro GG, Freitas IDMD, Reis A, García LC, Loguercio AD. In-office dental bleaching in adolescents using 6% hydrogen peroxide with and without gingival barrier: a randomized double-blind clinical trial. J Appl Oral Sci 2024; 32:e20230416. [PMID: 38536995 PMCID: PMC11037928 DOI: 10.1590/1678-7757-2023-0416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 01/19/2024] [Accepted: 01/31/2024] [Indexed: 04/26/2024] Open
Abstract
BACKGROUND At low concentrations used for in-office bleaching gels, such as 6% HP, gingival barrier continues to be performed. If we take into account that, in the at-home bleaching technique, no barrier is indicated, it seems that the use of a gingival barrier fails to make much sense when bleaching gel in low concentration is used for in-office bleaching. OBJECTIVE This double-blind, split-mouth, randomized clinical trial evaluated the gingival irritation (GI) of in-office bleaching using 6% hydrogen peroxide (HP) with and without a gingival barrier in adolescents, as well as color change and the impact of oral condition on quality of life. METHODOLOGY Overall, 60 participants were randomized into which side would or would not receive the gingival barrier. In-office bleaching was performed for 50 minutes with 6% HP in three sessions. The absolute risk and intensity of GI were assessed with a visual analogue scale. Color change was assessed using a digital spectrophotometer and color guides. The impact of oral condition on quality of life was assessed using the Brazilian version of the Oral Health Impact Profile (α=0.05). RESULTS The proportion of patients who presented GI for the "with barrier" group was 31.6% and for the "without barrier" group, 30% (p=1.0). There is an equivalence for the evaluated groups regarding GI intensity (p<0.01). Color change was detected with no statistical differences (p>0.29). There was a significant impact of oral condition on quality of life after bleaching (p<0.001). CONCLUSIONS The use or not of the gingival barrier for in-office bleaching with 6% HP was equivalent for GI, as well as for bleaching efficacy, with improvement in the impact of oral condition on quality of life.
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Affiliation(s)
- Taynara de Souza Carneiro
- Universidade Estadual de Ponta Grossa, Departamento de Dentística Restauradora, Ponta Grossa, Brasil
- Universidad Rey Juan Carlos, Facultad de Ciencias de la Salud, IDIBO, Madrid, España
| | - Michael Willian Favoreto
- Universidade Estadual de Ponta Grossa, Departamento de Dentística Restauradora, Ponta Grossa, Brasil
| | | | - Elisama Sutil
- Universidade Estadual de Ponta Grossa, Departamento de Dentística Restauradora, Ponta Grossa, Brasil
| | - Gabrielle Gomes Centenaro
- Universidade Estadual de Ponta Grossa, Departamento de Dentística Restauradora, Ponta Grossa, Brasil
| | | | - Alessandra Reis
- Universidade Estadual de Ponta Grossa, Departamento de Dentística Restauradora, Ponta Grossa, Brasil
| | - Laura Ceballos García
- Universidad Rey Juan Carlos, Facultad de Ciencias de la Salud, IDIBO, Madrid, España
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Cordeiro DCF, Favoreto MW, Centenaro GG, Gumy FN, Loguercio AD, Borges CPF, Reis A. At-home bleaching with carbamide peroxide with concentrations below 10%: bleaching efficacy and permeability in the pulp chamber. Clin Oral Investig 2024; 28:224. [PMID: 38509406 DOI: 10.1007/s00784-024-05604-7] [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: 01/23/2024] [Accepted: 03/06/2024] [Indexed: 03/22/2024]
Abstract
OBJECTIVES To evaluate the bleaching efficacy and permeability of hydrogen peroxide (HP) in the pulp chamber of human teeth bleached with lower concentrations of carbamide peroxide gel (4%, 5% and 7% CP). MATERIALS AND METHODS Bleaching gels with lower concentrations were formulated and a commercial standard gel, 10% CP, was used as a reference. Fifty-six human premolars were randomly divided into four groups. Applications of the bleaching gel were made for 3 h for 21 days. The bleaching efficacy was evaluated by digital spectrophotometry on 1, 7, 14 and 21 days, with analysis in the ∆Eab, ∆E00 and WID color spaces. The concentration of HP in the pulp chamber was measured in the same periods by UV-Vis spectrophotometry (µg/mL). Two-way repeated analysis of variance (ANOVA) examined bleaching efficacy and HP permeability, followed by Tukey's post-hoc test (α = 0.05). RESULTS All groups showed significant color changes, with no statistical differences after the second and third week of bleaching (p > 0.05). The 'time' factor was statistically different (p < 0.05), increasing the bleaching efficacy throughout the treatment. The 4% CP group had lower HP levels in the pulp chamber (p < 0.05). CONCLUSIONS The results seem promising, revealing that low concentration gels are as effective as 10% CP with the benefit of reducing the amount of HP in the pulp chamber. CLINICAL RELEVANCE Low concentration 4% PC and 5% PC maintains bleaching efficacy, reduces the penetration of HP peroxide into the pulp chamber, and may reduce tooth sensitivity.
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Affiliation(s)
- Deisy Cristina Ferreira Cordeiro
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Rua Carlos Cavalcanti, 4748, Bloco M - Uvaranas, Ponta Grossa, Paraná, Brazil
| | - Michael Willian Favoreto
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Rua Carlos Cavalcanti, 4748, Bloco M - Uvaranas, Ponta Grossa, Paraná, Brazil
| | - Gabrielle Gomes Centenaro
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Rua Carlos Cavalcanti, 4748, Bloco M - Uvaranas, Ponta Grossa, Paraná, Brazil
| | - Fernanda Novak Gumy
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Rua Carlos Cavalcanti, 4748, Bloco M - Uvaranas, Ponta Grossa, Paraná, Brazil
| | - Alessandro D Loguercio
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Rua Carlos Cavalcanti, 4748, Bloco M - Uvaranas, Ponta Grossa, Paraná, Brazil
| | | | - Alessandra Reis
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Rua Carlos Cavalcanti, 4748, Bloco M - Uvaranas, Ponta Grossa, Paraná, Brazil.
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Carneiro TS, Favoreto MW, Mena-Serrano A, Wendlinger M, Forville H, Reis A, Ceballos L, Loguercio AD. In vitro evaluation of the effect of different bleaching varnishes: Hydrogen peroxide penetration into the pulp chamber and color change. J ESTHET RESTOR DENT 2024; 36:402-409. [PMID: 37681984 DOI: 10.1111/jerd.13133] [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: 06/20/2023] [Revised: 08/09/2023] [Accepted: 08/28/2023] [Indexed: 09/09/2023]
Abstract
OBJECTIVE To evaluate the penetration of hydrogen peroxide (HP) into the pulp chamber and the color change of different bleaching varnishes in low concentrations used for at-home bleaching. MATERIALS AND METHODS Ninety healthy premolars were used, randomly distributed into nine groups (n = 10) according to bleaching varnish (PL, PolaLuminate; VS, VivaStyle Paint On Plus; CA, Cavex Bite&White whitening pen and; AW AlignerWhite) and time (10 and 30 min), and a control group (no bleaching). The penetration of HP was evaluated by UV-Vis spectroscopy. To evaluate the color change (ΔEab , ΔE00 , ΔWID ) a digital spectrophotometer was used (α = 0.05). RESULTS The AW group in 10 min and the control group showed similar and lower HP penetration in the pulp chamber when compared to the other groups (p = 0.003). Increasing the application time to 30 minutes elevated the amount of HP inside the pulp chamber for all groups (p = 0.003), except for PL (p > 0.05). When applied for 30 min all bleaching varnishes showed higher color change (ΔWID ) when compared to 10 min (p = 0.04). CONCLUSIONS For all bleaching varnishes evaluated, PolaLuminate applied for 30 min showed lower penetration into the pulp chamber and higher bleaching effects. CLINICAL SIGNIFICANCE The use of bleaching varnishes seems promising for teeth bleaching, but it varies according to user product and protocol.
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Affiliation(s)
- Taynara S Carneiro
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
- Area of Stomatology, IDIBO research group, Health Sciences Faculty, Rey Juan Carlos University, Alcorcón, Madrid, Spain
| | - Michael W Favoreto
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | | | - Michel Wendlinger
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Heloisa Forville
- 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
| | - Laura Ceballos
- Area of Stomatology, IDIBO research group, Health Sciences Faculty, Rey Juan Carlos University, Alcorcón, Madrid, Spain
| | - Alessandro D Loguercio
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, Brazil
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Costa D, Meireles A, Ferreira JL, Alcântara P, Torres LA, Câmara JVF, Pierote JJ, Canuto MH, Araújo CT. Microabrasion effect on enamel susceptibility to penetration of hydrogen peroxide: an experimental and computational study. Odontology 2021; 109:770-778. [PMID: 33709251 DOI: 10.1007/s10266-021-00598-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 02/22/2021] [Indexed: 12/19/2022]
Abstract
To evaluate in vitro transenamel/transdentinal of penetration of H2O2 after microabrasive. Computational models were performed to verify peroxide penetration and evaluate if geometric modifications could affect in vitro results. Enamel/dentin blocks from bovine incisors were prepared and randomly divided into groups (n = 15) according with abrasive (35% phosphoric acid and pumice or 6.6% hydrochloric acid and silica) and bleaching agents (16% carbamide peroxide and 35% H2O2). From artificial pulp chambers, the H2O2 concentration was measured and SEM was used for surface morphology. Numerical models were performed (Abaqus® v6.12) modifying slightly enamel/dentin thickness based on experimental data. All groups presented H2O2 penetration, although no significant difference was noted between the control and experimental groups (p > 0.05). The numerical analysis demonstrated the role of dental tissue thickness in the H2O2 penetration. Microabrasion is recommended as its association with bleaching procedures and small modifications in thicknesses of enamel/dentin can cause substantial changes in HP penetration. Such diffusion aspect is clinically relevant for the bleaching procedures since very thin enamel could present more peroxide propagation through dental tissues.
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Affiliation(s)
- Daiane Costa
- Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | - Agnes Meireles
- Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil.,Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Janaína Luciana Ferreira
- Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil.,Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Polyana Alcântara
- Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil
| | | | - João Victor Frazão Câmara
- Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil. .,Universidade de São Paulo, Faculdade de Odontologia de Bauru, Bauru, Brazil.
| | - Josué Junior Pierote
- Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil.,Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Piracicaba, Brazil
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Barboza ACS, Dos Santos PH, do Vale LR, de Oliveira Gallinari M, Assmann A, Vidal CMP, Fagundes TC, Briso ALF. Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability. Photodiagnosis Photodyn Ther 2020; 33:102141. [PMID: 33307228 DOI: 10.1016/j.pdpdt.2020.102141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 10/22/2020] [Accepted: 12/04/2020] [Indexed: 11/18/2022]
Abstract
BACKGROUND The purpose of this study was to investigate the effect of a novel dental bleaching technique with Violet LED on enamel color change, bond strength and hybrid layer nanomechanical properties in resin-dentin restoration, and dentin biostability. METHODS A total of 125 bovine incisors were distributed into a control group, violet LED group (LED), and 35 % peroxide hydrogen bleaching gel (BLG) groups (n = 15). Three 45-minute sessions were performed for both bleaching procedures every week. Enamel color change (ΔE, ΔL, and Δb) was determined after every bleaching session. After color analysis, dentin was exposed for the resin-dentin bond strength analysis using microtensile test and evaluation of the nanomechanical properties at the hybrid layer (nanohardness). While half of the specimens were tested immediately, the remaining were evaluated after 10,000 thermal cycles (TC). Thirty additional teeth were used to investigate dentin ultimate tensile strength (UTS) after the bleaching treatments. UTS was evaluated before and after an enzymatic challenge. Two-way repeated measures ANOVA and Tukey's post-test were used for the statistical analysis (α = 0.05). RESULTS Enamel bleaching effect was observed in the LED and BLG groups with significant alterations in the ΔE, ΔL, and Δb in the BLG group. No difference was observed in the resin-dentin bond strength among the groups (p > 0.05), however, TC negatively affected the bond strength values for all the groups. Nanomechanical properties remained unchanged when comparing immediate and after TC results (p > 0.05). Bleaching with BLG reduced significantly the dentin UTS, while all groups showed major decrease in UTS after the enzymatic challenge. CONCLUSIONS Although violet LED was able to promote a bleaching effect, less color changes was observed when compared to BLG. None of the bleaching techniques effected the resin-bond strength or the nanomechanics of the hybrid layer. Violet LED did negatively effect dentin biostability as observed for BLG and it may promote less changes to the organic content of dentin.
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Affiliation(s)
- Ana Carolina Souza Barboza
- Department of Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Postal code 16015-050 Araçatuba, São Paulo, Brazil
| | - Paulo Henrique Dos Santos
- Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Postal code 16015-050 Araçatuba, São Paulo, Brazil
| | - Luana Ribeiro do Vale
- Department of Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Postal code 16015-050 Araçatuba, São Paulo, Brazil
| | - Marjorie de Oliveira Gallinari
- Department of Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Postal code 16015-050 Araçatuba, São Paulo, Brazil
| | - André Assmann
- Department of Engineering and Exact Sciences, Federal University of Paraná, Rua Pioneiro 2153, Postal code 85950-00, Palotina, Brazil
| | - Cristina Mattos Pimenta Vidal
- Department of Operative Dentistry, College of Dentistry & Dental Clinics, University of Iowa, Iowa City, Iowa, United States
| | - Ticiane Cestari Fagundes
- Department of Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Postal code 16015-050 Araçatuba, São Paulo, Brazil
| | - André Luiz Fraga Briso
- Department of Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University (UNESP), Rua José Bonifácio 1193, Postal code 16015-050 Araçatuba, São Paulo, Brazil.
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da Rosa G, Maran BM, Schmitt VL, Loguercio AD, Reis A, Naufel FS. Effectiveness of Whitening Strips Use Compared With Supervised Dental Bleaching: A Systematic Review and Meta-analysis. Oper Dent 2020; 45:E289-E307. [PMID: 33215202 DOI: 10.2341/19-160-l] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2019] [Indexed: 11/23/2022]
Abstract
CLINICAL RELEVANCE Bleaching performed at home while under the supervision of a dentist provides greater color alteration compared with whitening strips when evaluated with a spectrophotometer, although the color alteration was undetectable by unaided human eyes. SUMMARY Objective: A systematic review and meta-analysis were performed to answer the following research question: Does the use of whitening strips (WS) lead to an equivalent color change compared with supervised dental bleaching in patients with permanent dentition?Methods: A search was performed on August 10, 2017 (updated on March 22, 2019), in PubMed, the Brazilian Library in Dentistry, Latin American and Caribbean Health Sciences Literature database, Cochrane Library, Scopus, Web of Science, and SIGLE, without restrictions regarding date or language. Abstracts from the International Association for Dental Research, unpublished and ongoing trial registries, dissertations, and theses were also searched. Only randomized clinical trials (parallel or split mouth) in patients with permanent dentition that compared WS with dentist-supervised dental bleaching performed at home (AH) or in office (IO) were included. The risk of bias (RoB) was evaluated using the Cochrane Collaboration tool. A meta-analysis with subgroup analysis (low and high peroxide concentration) was conducted for color change ΔE* (spectrophotometer) and ΔSGU (shade guide units), risk and intensity of tooth sensitivity (TS), gingival irritation (GI), and patient satisfaction using a random effects model. Heterogeneity was assessed with the Cochrane Q test and I2 statistics. GRADE (Grading of Recommendations, Assessment, Development and Evaluation) was used to assess the quality of the evidence.Results: After the removal of duplicates, followed by title and abstract screening, 20 studies remained. Only two studies were considered to have a low RoB; 11 had a high RoB, and seven had an unclear RoB. For WS versus IO, data were not available for the meta-analysis. For WS versus AH bleaching, a significant difference in ΔE* favoring the AH group was observed (standardized mean difference [SMD] = -0.50, 95% confidence interval [CI] -0.79 to 0.21), but the risk (risk ratio = 0.78, 95% CI 0.65 to 0.93) and intensity of TS (SMD = -0.30, 95% CI -0.56 to -0.04) were lower in the WS group. Color change in ΔSGU, risk and intensity of GI, and patient satisfaction were not significantly different between groups (p>0.20). The quality of evidence for ΔE*, risk and intensity of TS, and intensity of GI were graded as moderate.Conclusion: Although the risk and intensity of TS were lower in the WS group, dentist-supervised at-home bleaching led to a better color change when measured with a spectrophotometer, although the color alteration was undetectable by unaided human eyes.
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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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Pedroso JDF, Sangalli J, Brighenti FL, Tanaka MH, Koga-Ito CY. Control of bacterial biofilms formed on pacifiers by antimicrobial solutions in spray. Int J Paediatr Dent 2018; 28:578-586. [PMID: 30051634 DOI: 10.1111/ipd.12413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND The aim was to evaluate the use of vinegar, hydrogen peroxide and sodium bicarbonate solutions for the disinfection of pacifiers. DESIGN Different types and concentrations of the substances were screened in planktonic and biofilm for antimicrobial activity on Streptococcus mutans, Staphylococcus pyogenes, Staphylococcus aureus and Escherichia coli. Also, the effect of the most effective substance was tested against polymicrobial biofilms aiming to mimic the multispecies colonization found in a pacifier. RESULTS Based on the agar diffusion test, minimal inhibitory concentration (MIC) and minimal microbicide concentration assays, 70% apple vinegar (70%AV) and 70% hydrogen peroxide (70%HP) were selected (P < 0.05). All tested solutions were able to significantly reduce viable cells of S. pyogenes, S. mutans and E. coli from the biofilms A statistically significant reduction of viable cells in S. aureus biofilms were observed after treatment with 70%AV in comparison to the other treatments. When compared to other microbial species, it was found that 70%HP was particularly effective against E. coli. The solution of 70%HP was able to reduce the viable cells of Enterobacteriaceae/pseudomonas of a polymicrobial biofilm formed from a pacifier. The other solutions were not effective in relation to control group. CONCLUSION Solutions of 70% HP showed to be a good alternative for chlorhexidine digluconate for the disinfection of pacifiers.
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Affiliation(s)
- Juliana de F Pedroso
- Oral Biopathology Graduate Program, Institute of Science and Technology Campus of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - Jorgiana Sangalli
- Oral Biopathology Graduate Program, Institute of Science and Technology Campus of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - Fernanda L Brighenti
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, SP, Brazil
| | - Marcia H Tanaka
- Oral Biopathology Graduate Program, Institute of Science and Technology Campus of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - Cristiane Yumi Koga-Ito
- Oral Biopathology Graduate Program, Institute of Science and Technology Campus of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, SP, Brazil.,Department of Environmental Engineering, Institute of Science and Technology Campus of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, SP, 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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10
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Perdigão J, Lam VQ, Burseth BG, Real C. Masking of Enamel Fluorosis Discolorations and Tooth Misalignment With a Combination of At-Home Whitening, Resin Infiltration, and Direct Composite Restorations. Oper Dent 2017; 42:347-356. [DOI: 10.2341/16-181-t] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
This clinical report illustrates a conservative technique to mask enamel discolorations in maxillary anterior teeth caused by hypomineralization associated with enamel fluorosis and subsequent direct resin composite to improve the anterior esthetics. The treatment consisted of at-home whitening with 10% carbamide peroxide gel with potassium nitrate and sodium fluoride in a custom-fitted tray to mask the brown-stained areas, followed by resin infiltration to mask the white spot areas. An existing resin composite restoration in the maxillary right central incisor was subsequently replaced after completion of the whitening and resin infiltration procedures, whereas the two misaligned and rotated maxillary lateral incisors were built up with direct resin composite restorations to provide the illusion of adequate arch alignment, as the patient was unable to use orthodontic therapy.
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Affiliation(s)
- J Perdigão
- Jorge Perdigão, DMD, MS, PhD, Department of Restorative Sciences, University of Minnesota School of Dentistry, Minneapolis, MN, USA
| | - VQ Lam
- Viet Q. Lam, BS, University of Minnesota School of Dentistry, Minneapolis, MN, USA
| | - BG Burseth
- Brian G. Burseth, DDS, Private Practice, Crystal Lake, IL, USA
| | - C Real
- Carmen Real, DDS, Department of Primary Dental Care, University of Minnesota School of Dentistry, Minneapolis, MN, USA
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Aka B, Celik EU. Evaluation of the Efficacy and Color Stability of Two Different At-Home Bleaching Systems on Teeth of Different Shades: A Randomized Controlled Clinical Trial. J ESTHET RESTOR DENT 2017; 29:325-338. [DOI: 10.1111/jerd.12296] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Betül Aka
- Research Assistant; Department of Restorative Dentistry, Faculty of Dentistry, Izmir Katip Celebi University; Izmir Türkiye
| | - Esra Uzer Celik
- Associate Professor; DDS, PhD, Department of Restorative Dentistry, Faculty of Dentistry, Izmir Katip Celebi University; Izmir Türkiye
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