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1.
Pan Afr Med J ; 34: 72, 2019.
Artigo em Francês | MEDLINE | ID: mdl-31819788

RESUMO

Dental fluorosis is a developmental anomaly affecting aesthetic appearance. The association between microabrasion and external bleaching has shown satisfactory outcomes because it improves aesthetic outcome in patients with light dental fluorosis. The purpose of this study was to update the role of this association as well as its different effects on the enamelled surface.


Assuntos
Microabrasão do Esmalte/métodos , Fluorose Dentária/complicações , Clareamento Dental/métodos , Humanos
2.
BMC Oral Health ; 19(1): 247, 2019 11 14.
Artigo em Inglês | MEDLINE | ID: mdl-31727047

RESUMO

BACKGROUND: The aim of the present investigation was to evaluate enamel reduction efficiency, abrasive property decay, and enamel effects between oscillating mechanical and manual systems for interproximal enamel reduction (IPR). METHODS: Three oscillating strips and three manual strips were tested on twelve freshly extracted premolars blocked in an acrylic cylinder pot by means of a material testing machine. Each strip underwent one test of 8 cycles (30 s each). Both abrasive tracks and teeth surfaces were qualitative evaluated before and after IPR by means of SEM analysis. Efficiency and abrasive property decay of both IPR systems were investigated by the amount of enamel reduction within the eight-cycle testing. Independent t-test was used to evaluate differences in variables between the two systems. RESULTS: Mechanical IPR system showed higher efficiency in terms of enamel reduction (p < 0.005) when compared with manual IPR system (0.16 mm and 0.09 mm, respectively). Quantity of removed enamel decreased throughout the 8 cycles for both systems. Less presence of enamel debris and detachment of abrasive grains were observed on mechanical strips rather than manual strips. SEM analysis revealed more regular surface of teeth undergone mechanical IPR procedures. CONCLUSION: Oscillating diamond strips showed more controlled efficiency when compared with the manual IPR system leading to a more regular enamel surface.


Assuntos
Esmalte Dentário/efeitos dos fármacos , Diamante , Microabrasão do Esmalte/métodos , Dente Pré-Molar , Esmalte Dentário/patologia , Esmalte Dentário/ultraestrutura , Microabrasão do Esmalte/instrumentação , Humanos , Teste de Materiais , Microscopia Eletrônica de Varredura , Propriedades de Superfície
3.
Braz Dent J ; 29(2): 109-116, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29898055

RESUMO

This study aimed to evaluate the effect on oral health-related quality of life (OHRQoL) of two treatment protocols for dental fluorosis in individuals enrolled in a randomized clinical trial. Seventy volunteers, who lived in a fluorosis endemic area in Brazil, and had at least four maxillary anterior teeth showing fluorosis with a Thylstrup and Fejerskov index from 1 to 7, were randomized into two treatment groups (n= 35): GI- enamel microabrasion; or GII- microabrasion associated with at-home bleaching. Microabrasion was performed using 37% phosphoric acid and pumice, and at-home tooth bleaching with 10% carbamide peroxide in a tray. Volunteers completed a questionnaire at baseline and 1-month post treatment to assess changes in OHRQoL, using the Oral Impact on Daily Performance (OIDP). Differences in overall impact scores between and within treatment groups were analyzed with Wilcoxon (within) and Mann-Whitney (between) tests. Changes in performance scores were analyzed using Wilcoxon tests (a< 0.05). One month after treatment, subjects reported improvement in OHRQoL. Both groups showed lower OIDP scores (p< 0.001), but there was no difference between them. Eating, cleaning teeth, smiling and emotional state performance scores were lower after treatment for the whole sample. In conclusion, the treatment with microabrasion improved the OHRQoL in this sample of individuals living in a fluorosis endemic area regardless of the addition of at-home bleaching.


Assuntos
Peróxido de Carbamida/administração & dosagem , Microabrasão do Esmalte/métodos , Fluorose Dentária/tratamento farmacológico , Saúde Bucal , Ácidos Fosfóricos/administração & dosagem , Qualidade de Vida , Silicatos , Clareamento Dental/métodos , Adolescente , Adulto , Brasil/epidemiologia , Peróxido de Carbamida/uso terapêutico , Doenças Endêmicas , Feminino , Fluorose Dentária/epidemiologia , Fluorose Dentária/psicologia , Humanos , Masculino , Ácidos Fosfóricos/uso terapêutico , Inquéritos e Questionários , Adulto Jovem
4.
J Prosthet Dent ; 120(3): 323-326, 2018 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29724552

RESUMO

Dental fluorosis is a condition that produces unesthetic coloration of enamel because of excessive fluoride ingestion during enamel formation. Its appearance can range in severity from mildly white and opaque to dark brown and can lead a patient to seek dental treatment. Historically, these lesions have been masked, either with direct or indirect restorations, but more conservative treatment options are now available, including the combination of microabrasion and bleaching. This clinical report describes the use of these treatment options to address a young patient's dental fluorosis.


Assuntos
Microabrasão do Esmalte/métodos , Estética Dentária , Fluorose Dentária/terapia , Clareamento Dental/métodos , Tratamento Conservador/métodos , Feminino , Humanos , Adulto Jovem
5.
Aust Endod J ; 44(3): 235-239, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28940976

RESUMO

The aim of this study was to evaluate the fracture resistance of simulated immature teeth after internal bleaching. The teeth were assigned as follows (n = 12/group); Group-1: The pulp chamber was filled with ProRootMTA and bleached intracoronally with sodium perborate mixed with 37% carbamide peroxide gel; Group-2: The pulp chamber was filled with ProRootMTA without bleaching; Group-3: The pulp chamber was filled with Biodentine and bleached intracoronally as Group-1; Group-4: The pulp chamber was filled with Biodentine without bleaching; and Group-5: Teeth received no intervention (control). The specimens were loaded vertically until root fracture occurred. The data were analysed with Kruskal-Wallis and Dunn tests. There was no significant difference between the fracture resistances of the experimental groups (P > 0.05). However, all experimental groups had significantly lower fracture resistance than the control group (P < 0.05). Neither the tested calcium silicate cements nor the bleaching procedures had a significant impact on fracture resistance values.


Assuntos
Materiais Dentários/química , Cavidade Pulpar/efeitos dos fármacos , Microabrasão do Esmalte/métodos , Fraturas dos Dentes/prevenção & controle , Modelos Dentários , Humanos , Teste de Materiais , Sensibilidade e Especificidade , Dente Decíduo/efeitos dos fármacos
6.
Indian J Dent Res ; 28(6): 675-680, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29256469

RESUMO

CONTEXT: The design of the class V cavity presents a clinical challenge in the field of adhesive dentistry as the margin placement is partially in enamel and partly in dentin, and the trouble associated with this design is the microleakage at the dentinal margin. When these restorations undergo microabrasion due to cosmetic reasons, this trouble aggravates to the significant levels. AIMS: The aim of this study was the measurement of microleakage of class V glass ionomer restorations over two different periods of enamel microabrasion. SETTINGS AND DESIGN: This in vitro experimental study was conducted on 120 class V cavities which had been prepared on the buccal and lingual surfaces of 60 sound human premolars. One-half of the cavities were restored with the resin-modified glass ionomer cement (GIC) (60 cavities) and another half with the compomer (60 cavities). Finishing and polishing were performed. SUBJECTS AND METHODS: Then, the teeth were classified into six groups (n = 20). Microabrasion treatment was performed with Opaluster (Ultradent Product Inc., South Jordan, UT, USA) for 0 (control no treatment), 60 and 120 s. Then, teeth were thermocycled between 5°C and 55°C, immersed in rhodamine B solution (24 h), and sectioned longitudinally in buccolingual direction. Dye penetration was examined with stereomicroscope (×10). Microleakage scores were statistically analyzed. The mean occlusal margin scores and gingival margin scores were compared between all the groups using the Kruskal-Wallis test, Mann-Whitney U-test, Wilcoxon signed-rank test, and post hoc comparison. There was a significant difference between Group 1a, Group 2a, Group 1b, Group 2b, Group 1c, and Group 2c. STATISTICAL ANALYSIS USED: Statistical analysis used in this study was Kruskal-Wallis test, Mann-Whitney U-test, Wilcoxon signed-rank test, and post hoc comparison. RESULTS: The least microleakage scores were observed in occlusal margins of control groups (without microabrasion). Moreover, in both restorations, the microleakage scores in occlusal margins were higher than gingival margins, and compoglass had less microleakage in occlusal and occlusal plus axial walls of class V cavities compared with resin-modified GIC. Whereas, the light-cured glass ionomer had less microleakage in the gingival and gingival plus axial walls of class V cavities when compared with compoglass. CONCLUSIONS: The least microleakage scores were observed in occlusal margins of control groups (without microabrasion). Moreover, in both restorations, the microleakage scores in occlusal margins were higher than gingival margins.


Assuntos
Resinas Compostas , Infiltração Dentária , Restauração Dentária Permanente , Microabrasão do Esmalte/métodos , Cimentos de Ionômeros de Vidro , Resinas Sintéticas , Humanos , Técnicas In Vitro , Teste de Materiais
7.
J Indian Soc Pedod Prev Dent ; 35(3): 260-268, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28762354

RESUMO

CONTEXT: Dental fluorosis is caused by successive exposure to high concentrations of fluoride during tooth development leading to enamel with lower mineral content and increased porosity. AIMS: The aim of the study was to evaluate and compare the effectiveness of minimally invasive techniques for the removal of dental fluorosis stains in children in vivo. DESIGN: Ninety children in the age group of 10-17 years were selected. MATERIALS AND METHODS: The study sample was equally and randomly divided into three groups; Group 1: In-office bleaching with 35% hydrogen peroxide (HP) activated by light-emitting diode (LED) bleaching unit (35% HP), Group 2: Enamel microabrasion (EM) followed by in-office bleaching with 44% carbamide peroxide gel (EM), Group 3: In-office bleaching with 5% sodium hypochlorite (5% NaOCl). Statistical analysis was done using one-way ANOVA test. RESULTS: Bleaching with 35% HP activated by LED bleaching unit and EM followed by bleaching with 44% carbamide peroxide were equally effective for the removal of dental fluorosis stains in children in vivo. However, bleaching with 5% NaOCl could not completely remove moderate to severe stains. It was effective in removing only mild stains. Bleaching and microabrasion procedures caused slight decrease in tooth sensitivity readings by electric pulp vitality tester which continued to increase over time. However, none of the patients reported sensitivity in their teeth at any point of time. Patients were highly satisfied with the treatment outcome postoperatively but reported slight relapse of color in the three groups. CONCLUSIONS: Bleaching and microabrasion techniques can consider as an interesting alternatives to conventional operative treatment options.


Assuntos
Microabrasão do Esmalte/métodos , Fluorose Dentária/terapia , Clareadores Dentários/farmacologia , Clareamento Dental/métodos , Descoloração de Dente/terapia , Adolescente , Peróxido de Carbamida , Criança , Feminino , Humanos , Peróxido de Hidrogênio/farmacologia , Índia , Masculino , Satisfação do Paciente , Peróxidos/farmacologia , Hipoclorito de Sódio/farmacologia , Descoloração de Dente/etiologia , Resultado do Tratamento , Ureia/análogos & derivados , Ureia/farmacologia
8.
Int J Prosthodont ; 30(4): 394-395, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28697213

RESUMO

Different approaches ranging from veneers and crowns to employing the more conservative use of freehand resin composites have been proposed to correct esthetic problems caused by enamel fluorosis (EF). However, the protocol of mega-abrasion followed by microabrasion may be used as an alternative. It is less invasive and can minimize the unesthetic brown-to-whitish spots caused by EF. This article describes an easy and low-cost technique for managing enamel defects in a patient with severe enamel fluorosis.


Assuntos
Microabrasão do Esmalte/métodos , Fluorose Dentária/terapia , Misturas Complexas/uso terapêutico , Dentifrícios/uso terapêutico , Estética Dentária , Humanos
9.
Av. odontoestomatol ; 33(3): 103-112, mayo-jun. 2017. graf, tab
Artigo em Espanhol | IBECS | ID: ibc-165138

RESUMO

Los tratamientos blanqueadores actuales pretenden mejorar la calidad estética de la sonrisa de los pacientes, aplicando técnicas y materiales mínimamente invasivos. Existen en el mercado numerosos productos al alcance tanto del público como de los profesionales odontológicos cuya acción se basa en un contacto directo a diente, en una franja de tiempos y en un sistema de aplicación determinado, de materiales como peróxidos de hidrógeno o carbamidas, a diferentes concentraciones. En general, aquellos de concentraciones altas se utilizan ante tratamientos en la clínica dental, siendo menor la exposición del diente en tiempo, el material más ampliamente utilizado en este tipo de blanqueamiento tiende a ser la carbamida. Mientras que para evitar hipersensibilidad dental posterior, daños en la mucosa oral y perioral e incluso el potencial carcinogénico que tienen los blanqueamientos, cada vez se ha pasado a utilizar materiales a baja dosis, de uso diario durante un tiempo determinado, en el hogar por parte del paciente, a base de peróxido de hidrógeno (AU)


Current bleaching treatments aim to improve the aesthetic quality of the patients' smile, applying minimally invasive techniques and materials. There are many products on the market available to both the public and dental professionals whose action is based on a direct contact with a tooth, in a time band and in a specific application system, of materials such as hydrogen peroxide or carbamides, a different concentrations. In general, those with high concentrations are used in dental clinic treatments, with less exposure of the tooth in time, the material most widely used in this type of bleaching tends to be carbamide. Whereas, in order to avoid posterior hypersensitivity, oral and perioral mucosal damage and even the carcinogenic potential of bleaching, the use of low-dose, daily-use materials for a given time in the home has been increasingly used Of the patient, based on hydrogen peroxide (AU)


Assuntos
Humanos , Clareamento Dental/métodos , Clareadores Dentários/análise , Sensibilidade da Dentina/prevenção & controle , Peróxido de Hidrogênio/farmacocinética , Microabrasão do Esmalte/métodos , Clareamento Dental/efeitos adversos
10.
Eur J Orthod ; 39(2): 116-121, 2017 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-27030284

RESUMO

Background/objectives: The management of post-orthodontic white spot lesions is based on remineralization strategies or a minimal-invasive camouflage of the lesions. Aim: The aim of this systematic review was to identify and assess the quality of evidence for the various clinical technologies. Search methods: Four databases were searched for relevant literature published in English between 2011 and 31 October 2015 according to a pre-determined PICO. Only controlled clinical studies were considered. Abstract lists and the selected full-text papers were independently examined by two reviewers and any differences were solved in consensus. The Cochrane handbook and the AMSTAR tool were used for grading the risk of bias. The quality of evidence was rated according to GRADE. Results: Out of 280 identified publications, seven studies on remineralization, micro-abrasion and resin infiltration met the inclusion criteria. Two of them were assessed with low risk of bias. No pooling of results was possible due to study heterogeneity. The quality of evidence for all technologies was graded as very low. Limitations: Only papers published in English with more than 20 adolescents or young adults were considered. Furthermore, a follow-up period of at least 8 weeks was required. The publication bias could not be assessed due to the paucity of included trials. Conclusions/clinical implications: There is a lack of reliable scientific evidence to support re-mineralizing or camouflaging strategies to manage post-orthodontic white spot lesions. Further well-performed controlled clinical trials with long-term follow-up are needed to establish best clinical practice.


Assuntos
Cárie Dentária/terapia , Braquetes Ortodônticos/efeitos adversos , Remineralização Dentária/métodos , Adolescente , Adulto , Cárie Dentária/etiologia , Remoção de Dispositivo , Microabrasão do Esmalte/métodos , Medicina Baseada em Evidências/métodos , Feminino , Humanos , Viés de Publicação , Resinas Sintéticas/uso terapêutico , Adulto Jovem
11.
J Indian Soc Pedod Prev Dent ; 34(2): 111-4, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27080958

RESUMO

AIM: To evaluate an individual method of cleaning and preparing occlusal fissure surface before placement of pit and fissure sealant and to determine a method for better retention of the sealant. MATERIALS AND METHODS: The present study consisted of 100 young permanent molar teeth divided into four equal groups: Group 1-Brushing only, Group 2-Application of pumice slurry, Group 3-Surface conditioning, and Group 4-Control (without any preparation). Subsequent to fissure preparation, the fissures were etched using 37% phosphoric acid except for Group 3, which was etched using 10% maleic acid for 30 s. The samples were then rinsed for 10 s using air water spray of the three-way syringe and dried using oil-free compressed air with a hand pump air pressure syringe. After ensuring a frosted appearance of the enamel at the fissure entrance, pit and fissure sealants were applied on the surface according to manufacturer's instructions. All the cases were clinically evaluated for retention after 3 months, 6 months, and 12 months of application and the retention rate was assessed based on the criteria proposed by Simonsen. RESULTS: The pumice slurry group and surface conditioning group showed results with 100%, 96%, and 92% complete retention seen at 3 months, 6 months, and 12 months, respectively. CONCLUSION: The pumice slurry group and surface conditioning group showed a significantly higher retention when compared to the brushing group, whereas the control group (without any preparation) showed the least retention when compared to all the other groups.


Assuntos
Cárie Dentária/prevenção & controle , Esmalte Dentário/efeitos dos fármacos , Profilaxia Dentária/métodos , Selantes de Fossas e Fissuras/química , Condicionamento Ácido do Dente , Criança , Microabrasão do Esmalte/métodos , Feminino , Humanos , Masculino , Maleatos , Dente Molar , Ácidos Fosfóricos , Silicatos , Propriedades de Superfície , Escovação Dentária
12.
Dent Today ; 35(3): 97-9, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27039546

RESUMO

In this case example, the use of direct composite resin allowed for a relatively simple, conservative treatment that provided excellent function and aesthetics, while preserving healthy dental tissue. The importance of continued follow-up and a periodic maintenance and minor repair process will ensure longevity of the restorations, as aesthetics, and the occlusion.


Assuntos
Resinas Compostas/química , Materiais Dentários/química , Restauração Dentária Permanente/métodos , Descoloração de Dente/terapia , Condicionamento Ácido do Dente/métodos , Antibacterianos/efeitos adversos , Esmalte Dentário/efeitos dos fármacos , Esmalte Dentário/patologia , Reparação de Restauração Dentária , Desgaste de Restauração Dentária , Microabrasão do Esmalte/métodos , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Cimentos de Resina/química , Dióxido de Silício/química , Tetraciclina/efeitos adversos , Descoloração de Dente/induzido quimicamente , Zircônio/química
13.
Gen Dent ; 64(2): 60-4, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26943091

RESUMO

The aim of this case report is to report esthetic rehabilitation with combined tooth bleaching, enamel microabrasion, and anterior restoration replacement in a 26-year-old man. Clinical examination showed deficient restorations in the maxillary anterior teeth, significant discoloration of the maxillary left central incisor, and hypoplastic stains affecting the maxillary right lateral incisor. A radiograph of the left central incisor showed satisfactory endodontic treatment, allowing preparation for the walking bleach technique. For 3 weeks, 37% carbamide peroxide in the pulp chamber was renewed every week. In-office bleaching with 35% hydrogen peroxide was also performed on the maxillary teeth. After 21 days, all teeth had been bleached to shade A1. After bleaching was completed, enamel microabrasion of the maxillary right lateral incisor was conducted with 6% hydrochloric acid. In later sessions, microhybrid composite resin restorations were placed in all 4 maxillary incisors. A combination of dental bleaching techniques, enamel microabrasion, and resin restorations was a successful and conservative choice for reestablishing the natural appearance of discolored teeth, improving the self-esteem of the patient.


Assuntos
Restauração Dentária Permanente/métodos , Microabrasão do Esmalte/métodos , Estética Dentária , Clareamento Dental/métodos , Adulto , Humanos , Masculino , Descoloração de Dente/terapia
14.
Am J Orthod Dentofacial Orthop ; 149(4): 555-66, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27021460

RESUMO

A man, aged 28 years 9 months, came for an orthodontic consultation for a skeletal Class III malocclusion (ANB angle, -3°) with a modest asymmetric Class II and Class III molar relationship, complicated by an anterior crossbite, a deepbite, and 12 mm of asymmetric maxillary crowding. Despite the severity of the malocclusion (Discrepancy Index, 37), the patient desired noninvasive camouflage treatment. The 3-Ring diagnosis showed that treatment without extractions or orthognathic surgery was a viable approach. Arch length analysis indicated that differential interproximal enamel reduction could resolve the crowding and midline discrepancy, but a miniscrew in the infrazygomatic crest was needed to retract the right buccal segment. The patient accepted the complex, staged treatment plan with the understanding that it would require about 3.5 years. Fixed appliance treatment with passive self-ligating brackets, early light short elastics, bite turbos, interproximal enamel reduction, and infrazygomatic crest retraction opened the vertical dimension of the occlusion, improved the ANB angle by 2°, and achieved excellent alignment, as evidenced by a Cast Radiograph Evaluation score of 28 and a Pink and White dental esthetic score of 3.


Assuntos
Má Oclusão de Angle Classe III/diagnóstico , Má Oclusão de Angle Classe II/diagnóstico , Adulto , Cefalometria/métodos , Microabrasão do Esmalte/métodos , Estética Dentária , Humanos , Masculino , Má Oclusão de Angle Classe II/terapia , Má Oclusão de Angle Classe III/terapia , Procedimentos de Ancoragem Ortodôntica/instrumentação , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Contenções Ortodônticas , Sobremordida/diagnóstico , Sobremordida/terapia , Planejamento de Assistência ao Paciente , Técnicas de Movimentação Dentária/instrumentação , Resultado do Tratamento , Dimensão Vertical
15.
Rev. Ciênc. Plur ; 1(3): 76-84, 2015. ilus
Artigo em Português | BBO - Odontologia | ID: biblio-855839

RESUMO

Introdução A estética do sorriso tem motivado pacientes a buscarem o tratamento odontológico. Assim, apresença de manchas brancas pode causar desconforto para o paciente, necessitando de intervenção por parte do cirurgião dentista. Objetivo: Descrever a técnica de microabrasão aplicada para o tratamento estético de múltiplas lesões brancas inativas de cárie dentária, visualizadas após remoção de aparelho ortodôntico. Métodos: A microabrasão dentária foi realizada através da manipulação e aplicação de uma pasta à base de pedra pomes e ácido fosfórico a 37%. A pasta foi aplicada, sob isolamento absoluto, com taça de borracha, perfazendo um total de 6 aplicações, com duração de 15 s cada. Ao final de cada aplicação foi realizada lavagem com jato de água.Resultados: A utilização da técnica de microabrasão demonstrou resultado estético satisfatório para o tratamentode múltiplas lesões brancas inativas de cárie superficiais no esmalte dentário. Conclusões: A preservação daestrutura dentária, bem como a devolução da estética, obtidas através da microabrasão sugerem queprocedimentos minimamente invasivos devem ser sempre utilizados como a primeira opção de tratamento paralesão branca inativa de cárie que cause desconforto estético para o paciente


Introduction: The aesthetics of the smile has motivated patients to seek dental treatment. Thus, the presence ofwhite spot lesions may cause discomfort for the patient, requiring intervention by the dentist. Objective: To describe the microabrasion technique applied for the aesthetic treatment of multiple inactive white spot lesions after removal of orthodontic appliance. Methods: The dental microabrasion was accomplished through the manipulation and application of a paste based on pumice and 37% phosphoric acid. The paste was applied, under rubber dam,with rubber cup, making a total of six applications, lasting 15 seconds each. At the end of each application washingwith water jet was done. Results: The use of microabrasion technique showed satisfactory aesthetic result for thetreatment of multiple inactive white spot lesions on the enamel surface. Conclusions: The preservation of toothstructure as well as the return of aesthetics obtained by microabrasion reinforce that minimally invasive procedures should always be used as the first treatment option for inactive white spot lesions that cause aesthetic discomfort for the patient


Assuntos
Humanos , Feminino , Cárie Dentária/prevenção & controle , Procedimentos Cirúrgicos Minimamente Invasivos , Microabrasão do Esmalte/métodos , Brasil
16.
Dent Mater J ; 35(1): 13-20, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26830820

RESUMO

This study evaluated the effects of combining enamel microabrasion and dental bleaching on the physical properties of enamel, using in vitro and in situ conditions and evaluating surface roughness, enamel microhardness and scanning electron microscopy images. One hundred sound bovine teeth were sectioned and cut into discs and randomly divided into 10 study groups (n=10). The results were submitted to Analysis of Variance (ANOVA) for repeated measures, followed by the Tukey test, with significance at 5%. Enamel surface roughness was significantly influenced by microabrasion, regardless of being combined with dental bleaching, for both HS (Human Saliva) or AS (Artificial Saliva) condition. Enamel microhardness was significantly decreased in the groups in which enamel microabrasion was performed, regardless its combination with dental bleaching; although storage in HS reestablished the initial enamel microhardness. It was concluded that dental bleaching does not cause major damage to microabraided enamel, and that only human saliva recovered the initial enamel microhardness.


Assuntos
Microabrasão do Esmalte/métodos , Clareamento Dental/métodos , Animais , Bovinos , Dureza , Humanos , Técnicas In Vitro , Microscopia Eletrônica de Varredura , Saliva/química , Saliva Artificial/química , Propriedades de Superfície
17.
Dent Mater J ; 35(1): 21-8, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26830821

RESUMO

The present study assessed the effect of sandblasting and silanization on resin cement bond strengths to CAD/CAM resin blocks. Twenty four blocks (KATANA AVENCIA BLOCK) were divided into two resin cement groups (PANAVIA V5 [PV5] and PANAVIA SA CEMENT HANDMIX [PSA]), and further divided into four subgroups representing different surface treatment methods: no treatment (Ctl), silanization (Si), sandblasting (Sb), and Sb+Si. After resin application, microtensile bond strengths (µTBSs) were measured immediately, 1, 3 and 6 months after water storage. In addition, surfaces resulting from each of the treatment methods were analyzed by scanning electron microscopy (SEM). Three-way analysis of variance revealed a statistically significant effect for the parameters 'surface treatment' (p<0.001, F=370), 'resin cement' (p<0.001, F=103, PSA

Assuntos
Colagem Dentária/métodos , Microabrasão do Esmalte/métodos , Cimentos de Resina/química , Silanos/química , Desenho Assistido por Computador , Cimentos Dentários , Teste de Materiais , Microscopia Eletrônica de Varredura , Autocura de Resinas Dentárias , Estresse Mecânico , Resistência à Tração
18.
Dent Mater J ; 35(1): 29-36, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26830822

RESUMO

The present study assessed the effect of ultrasonic and acid cleaning on resin cement bonding to CAD/CAM resin blocks. One of two resin cements, PANAVIA V5 (PV5) or PANAVIA SA CEMENT HANDMIX (PSA), were bonded to one of 24 CAD/CAM blocks (KATANA AVENCIA BLOCK). Each cement group was divided into four subgroups: no cleaning (Ctl), ultrasonic cleaning (Uc), acid cleaning (Ac) and Uc+Ac. Micro-tensile bond strengths (µTBSs) were measured immediately and 1, 3, and 6 months after water storage. Block surfaces after each treatment were analyzed by scanning electron microscopy. Analysis of variance revealed a statistically significant effect for the parameters 'surface treatment' (p<0.001, F=40), 'resin cement' (p<0.001, F=696) and 'water aging' (p<0.001, F=71). The PV5 group exhibited higher µTBS values than the PSA group. Although cleaning after sandblasting was effective in removing residual alumina particles, it did not affect the long-term bonding durability with non-contaminated CAD/CAM resin blocks.


Assuntos
Condicionamento Ácido do Dente/métodos , Colagem Dentária/métodos , Microabrasão do Esmalte/métodos , Cimentos de Resina/química , Silanos/química , Ultrassom/métodos , Desenho Assistido por Computador , Cimentos Dentários , Teste de Materiais , Microscopia Eletrônica de Varredura , Autocura de Resinas Dentárias , Estresse Mecânico , Resistência à Tração
19.
Acta Odontol Scand ; 74(1): 7-13, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-25892478

RESUMO

OBJECTIVE: To compare the effects of different treatment methods used for the enamel damage, on the shear bond strength (SBS) and fracture mode of orthodontic brackets. MATERIALS AND METHODS: Freshly-extracted 140 premolars were randomly allocated to seven groups: Group I was considered as the control of other groups. The remaining groups were exposed to demineralization. In group II, brackets were directly bonded to the demineralized enamel surface. CPP-ACP paste (GC Tooth Mousse), fluoride varnish (Bifluorid 12), microabrasion with a mixture prepared with 18% hydrochloric acid and fine pumice powder, microabrasion with an agent (Opalustre) and resin infiltrant (Icon®) were applied in Groups III, IV, V, VI and VII, respectively. The specimens were tested for SBS and bond failures were scored according to the Adhesive Remnant Index (ARI). Analysis of variance and Tukey tests were used to compare the SBS of the groups. ARI scores were compared with G-test. The statistical significance was set at p < 0.05 level. RESULTS: Statistically significant differences were found among seven groups (F = 191.697; p < 0.001). The SBSs of groups I (mean = 18.8 ± 2.0 MPa) and VII (mean = 19.1 ± 1.4 MPa) were significantly higher than the other groups. No statistically significant difference was found between groups IV (mean = 11.5 ± 1.2 MPa) and V (mean = 12.6 ± 1.5 MPa). The differences in ARI scores of the groups were statistically significant (p < 0.01). CONCLUSIONS: All demineralization treatment methods improve bonding to demineralized enamel. Resin infiltrant application after demineralization showed similar bond strength values as intact enamel.


Assuntos
Colagem Dentária , Esmalte Dentário/ultraestrutura , Braquetes Ortodônticos , Desmineralização do Dente/patologia , Condicionamento Ácido do Dente/métodos , Adesividade , Fluoreto de Cálcio/química , Cariostáticos/química , Caseínas/química , Misturas Complexas/química , Resinas Compostas/química , Colagem Dentária/métodos , Análise do Estresse Dentário/instrumentação , Microabrasão do Esmalte/métodos , Fluoretos Tópicos/química , Humanos , Ácido Clorídrico/química , Teste de Materiais , Distribuição Aleatória , Cimentos de Resina/química , Resinas Sintéticas/química , Resistência ao Cisalhamento , Silicatos/química , Fluoreto de Sódio/química , Estresse Mecânico , Temperatura , Fatores de Tempo
20.
BMJ Case Rep ; 20152015 Jun 29.
Artigo em Inglês | MEDLINE | ID: mdl-26123469

RESUMO

In recent times, as a result of extensive drinking water fluoridation, the number of patients affected by fluorosis has increased considerably. The purpose of this clinical report is to describe the use of enamel microabrasion for a patient with severe fluorosis using 37% phosphoric acid and pumice mixture. The results were pleasing, and hence 37% phosphoric acid can be recommended as a safe and easily available alternative in microabrasion procedures.


Assuntos
Microabrasão do Esmalte/métodos , Fluorose Dentária/terapia , Descoloração de Dente/terapia , Criança , Feminino , Fluorose Dentária/complicações , Humanos , Ácidos Fosfóricos/uso terapêutico , Silicatos/uso terapêutico , Descoloração de Dente/etiologia
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