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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: 3] [Impact Index Per Article: 0.8] [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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Athayde GS, Jorge RC, Americano G, Barja-Fidalgo F, Soviero VM. Esthetic Management of Incisors with Diffuse and Demarcated Opacities: 24 Month Follow-up Case Report. Oper Dent 2020; 45:569b-574. [PMID: 32516394 DOI: 10.2341/19-206-s] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2019] [Indexed: 11/23/2022]
Abstract
CLINICAL RELEVANCE A minimally invasive esthetic treatment can provide longevity and color stability. SUMMARY This clinical case report describes a minimally invasive approach to mask diffuse and demarcated opacities in permanent anterior teeth in an eight-year-old child who was upset with the appearance of her incisors. Clinical examination showed diffuse opacities in teeth 7, 8, 9, and 10, diagnosed as dental fluorosis associated with yellow demarcated opacity in tooth 9 related to molar-incisor hypomineralization. The treatment was based on conservative dentistry using the low-viscosity resin infiltration technique and resin composite restoration in an attempt to mask the lesions. The follow-up time was 24 months.
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Wu Y, Han Z, Wei L, Sun H, Wang T, Chen J, Zhang R, Lu X. Depolymerization-Induced Electrochemiluminescence of Insoluble Porphyrin in Aqueous Phase. Anal Chem 2020; 92:5464-5472. [PMID: 32141290 DOI: 10.1021/acs.analchem.0c00208] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Exploring efficient and robust electrochemiluminescence (ECL) performance of liposoluble porphyrins in aqueous phase for analytical purposes especially for important biological targets is still very challenging. In this work, a novel depolymerization-induced electrochemiluminescence (DIECL) of porphyrin and β-cyclodextrin (β-CD) self-assembly through a coreactant route was discovered. Among the studied meso-tetrasubstituted porphyrins, self-assembly of 5,10,15,20-tetrakis(4-hydroxyphenyl) porphyrin (THPP) and β-CD (THPP@β-CD) exhibits the best DIECL behavior with high efficiency (21.8%) as well as good reproducibility and stability. A mechanistic study suggests that the facile complexation of porphyrins with amphiphilic β-CD via hydrogen bonding interaction greatly improves the water insolubility and the aggregation-caused deficient ECL of liposoluble porphyrins in aqueous solution. Furthermore, because of the strong hydrogen bonding between the hydroxyl groups on THPP@β-CD and a highly electronegative substrate, such THPP@β-CD is found to serve as an efficient luminophore for recognition of most electronegative fluoride (F-) in the aqueous phase with high sensitivity and selectivity, together with a low limit of detection (0.74 μΜ). The simplicity of this THPP@β-CD and its unique DIECL property in current work provides a new guide for the ECL applications of liposoluble porphyrins in aqueous phase.
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Affiliation(s)
- Yanxia Wu
- Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China
| | - Zhengang Han
- Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China
| | - Liping Wei
- Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China
| | - Heshui Sun
- Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China
| | - Tieying Wang
- Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China
| | - Jing Chen
- Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China
| | - Ruizhong Zhang
- Tianjin Key Laboratory of Molecular Photoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, People's Republic of China
| | - Xiaoquan Lu
- Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China.,Tianjin Key Laboratory of Molecular Photoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, People's Republic of China
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Pini NIP, Sundfeld-Neto D, Aguiar FHB, Sundfeld RH, Martins LRM, Lovadino JR, Lima DANL. Enamel microabrasion: An overview of clinical and scientific considerations. World J Clin Cases 2015; 3:34-41. [PMID: 25610848 PMCID: PMC4295217 DOI: 10.12998/wjcc.v3.i1.34] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 10/06/2014] [Accepted: 10/29/2014] [Indexed: 02/05/2023] Open
Abstract
Superficial stains and irregularities of the enamel are generally what prompt patients to seek dental intervention to improve their smile. These stains or defects may be due to hypoplasia, amelogenesis imperfecta, mineralized white spots, or fluorosis, for which enamel microabrasion is primarily indicated. Enamel microabrasion involves the use of acidic and abrasive agents, such as with 37% phosphoric acid and pumice or 6% hydrochloric acid and silica, applied to the altered enamel surface with mechanical pressure from a rubber cup coupled to a rotatory mandrel of a low-rotation micromotor. If necessary, this treatment can be safely combined with bleaching for better esthetic results. Recent studies show that microabrasion is a conservative treatment when the enamel wear is minimal and clinically imperceptible. The most important factor contributing to the success of enamel microabrasion is the depth of the defect, as deeper, opaque stains, such as those resulting from hypoplasia, cannot be resolved with microabrasion, and require a restorative approach. Surface enamel alterations that result from microabrasion, such as roughness and microhardness, are easily restored by saliva. Clinical studies support the efficacy and longevity of this safe and minimally invasive treatment. The present article presents the clinical and scientific aspects concerning the microabrasion technique, and discusses the indications for and effects of the treatment, including recent works describing microscopic and clinical evaluations.
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Sundfeld RH, Sundfeld-Neto D, Machado LS, Franco LM, Fagundes TC, Briso ALF. Microabrasion in tooth enamel discoloration defects: three cases with long-term follow-ups. J Appl Oral Sci 2014; 22:347-54. [PMID: 25141208 PMCID: PMC4126832 DOI: 10.1590/1678-775720130672] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 04/30/2014] [Indexed: 01/17/2023] Open
Abstract
Superficial irregularities and certain intrinsic stains on the dental enamel surfaces
can be resolved by enamel microabrasion, however, treatment for such defects need to
be confined to the outermost regions of the enamel surface. Dental bleaching and
resin-based composite repair are also often useful for certain situations for tooth
color corrections. This article presented and discussed the indications and
limitations of enamel microabrasion treatment. Three case reports treated by enamel
microabrasion were also presented after 11, 20 and 23 years of follow-ups.
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Affiliation(s)
- Renato Herman Sundfeld
- Department of Restorative Dentistry, Araçatuba Dental School, Univ. Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Daniel Sundfeld-Neto
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil
| | - Lucas Silveira Machado
- Department of Restorative Dentistry, Araçatuba Dental School, Univ. Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Laura Molinar Franco
- Department of Restorative Dentistry, Araçatuba Dental School, Univ. Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Ticiane Cestari Fagundes
- Department of Restorative Dentistry, Araçatuba Dental School, Univ. Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - André Luiz Fraga Briso
- Department of Restorative Dentistry, Araçatuba Dental School, Univ. Estadual Paulista, Araçatuba, São Paulo, Brazil
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Sundfeld RH, Franco LM, Gonçalves RS, de Alexandre RS, Machado LS, Neto DS. Accomplishing esthetics using enamel microabrasion and bleaching-a case report. Oper Dent 2013; 39:223-7. [PMID: 23919624 DOI: 10.2341/13-002-s] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
This case report describes the sequential steps that were used to treat unesthetic, white, hard-texture enamel stains of unknown etiology. A tapered fine diamond bur was used to remove superficial enamel followed by the use of an enamel microabrasion compound Opalustre (Ultradent Products Inc). This technique removed the stains and was followed by polishing with a fluoride paste to restore the enamel to a smooth finish. The teeth were subsequently bleached with carbamide peroxide (Opalescence 10%, Ultradent Products), which achieved the patient's desired esthetic results.
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Kim HJ, Karanxha L, Park SJ. Non-destructive management of white spot lesions by using tooth jewelry. Restor Dent Endod 2013; 37:236-9. [PMID: 23430292 PMCID: PMC3568645 DOI: 10.5395/rde.2012.37.4.236] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 10/18/2012] [Accepted: 10/23/2012] [Indexed: 11/11/2022] Open
Abstract
Although several methods including composite resin restoration and microabrasion have been used for management of white spot lesion, tooth jewelry can be considered as another noninvasive option. This case report describes the management of white spot lesions by using tooth jewelry. This report also highlights the patients' preference for tooth jewelry as an esthetic concern.
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Affiliation(s)
- Hee-Jin Kim
- Department of Conservative Dentistry, Wonkwang University School of Dentistry, Iksan, Korea
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Carvalho LD, Bernardon JK, Bruzi G, Andrada MAC, Vieira LCC. Hypoplastic enamel treatment in permanent anterior teeth of a child. Oper Dent 2013; 38:363-8. [PMID: 23327230 DOI: 10.2341/12-284-t] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In some patients with labial white stains involving the enamel and dentin, bleaching associated with a restorative procedure using composites may be an appropriate treatment alternative. Although bleaching makes the teeth and the stain whiter, the staining is less evident and easier to restore. Restorative procedures using adequate composites may then recover the natural optical properties while also providing appropriate mechanical properties, thereby ensuring the longevity of the treatment. In this article, the clinical case of a 9-year-old patient who reported dissatisfaction with her smile because of the presence of hypoplastic enamel staining at the central superior and inferior incisors is reported. The treatment consisted of a bleaching protocol followed by composite resin restorations using the stratification technique. The final esthetic result demonstrated the possibility of obtaining a natural smile with an adequate color and natural-looking restorations, thereby ensuring the esthetics and the patient's functional satisfaction.
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Affiliation(s)
- L D Carvalho
- Department of Dentistry, School of Dentistry, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil.
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Muñoz MA, Arana-Gordillo LA, Gomes GM, Gomes OM, Bombarda NHC, Reis A, Loguercio AD. Alternative esthetic management of fluorosis and hypoplasia stains: blending effect obtained with resin infiltration techniques. J ESTHET RESTOR DENT 2012; 25:32-9. [PMID: 23374407 DOI: 10.1111/j.1708-8240.2012.00527.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
STATEMENT OF PROBLEM New light-polymerized resin composites optimized for rapid infiltration of enamel lesions with resin light curing monomers are commercially available today to prevent enamel lesions from further demineralization and provide a highly conservative therapy. In addition, this technique has proved to be effective treatment for blending white spot lesions because the microporosities of infiltrated lesions are filled with resin. PURPOSE This clinical report presents and describes cases in which the minimally invasive infiltrant resin technique was used for blending different microporous lesions, mild-to-moderate fluorosis, and hypoplasia stains related to traumatic dental injuries. RESULTS The fluorosis stain showed visually perceptual improvements. In the cases of hypoplasia, stains were not completely blended. However, the general clinical outcomes of these cases were considered successful and recovered the patients' self-esteem. CONCLUSION Based on the results obtained, it could be concluded that the resin infiltration technique shows promising results and could be considered a minimally invasive procedure for mild-to-moderate fluorosis and hypoplasia stains. CLINICAL SIGNIFICANCE This case study allows a better understanding of the concept of the resin infiltration technique applied in other types of porous lesions, increasing its use as a therapeutic alternative for esthetic purposes in the philosophy of minimally invasive dentistry.
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Affiliation(s)
- Miguel Angel Muñoz
- School of Dentistry, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil
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Abstract
Enamel hypoplasia is a developmental defect of the enamel that is produced by a disturbance in the formation of the organic enamel matrix, clinically visible as enamel defects. Disorders that occur during the stages of enamel development and maturation reduce the amount or thickness of the enamel, resulting in white spots, tiny grooves, depressions and fissures in the enamel surface. The complexity and intensity of the dental deformity lesions will conduct the ideal treatment-associating conservative techniques. This article presents a case report of a restorative treatment of enamel hypoplasia using hybrid composite resin to mask color alteration and enamel defects. An aesthetic appearance that respects the tooth polychromatic and the self-esteem of the patient can be achieved with this approach.
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Affiliation(s)
- Josué Martos
- Department of Semiology and Clinics, Faculty of Dentistry, University Federal of Pelotas, Pelotas, Brazil
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