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1.
Endodoncia (Madr.) ; 36(3): 44-50, dic. 2018. ilus
Artigo em Espanhol | IBECS | ID: ibc-178385

RESUMO

Introducción: La metamorfosis cálcica se presenta comúnmente tras lesiones traumáticas y se caracteriza por presentar depósitos de tejido duro dentro del espacio pulpar, obliterando parcial o totalmente la cámara pulpar y/o el conducto radicular. Este proceso suele provocar un cambio de coloración de la corona clínica haciéndola más oscura y opaca. Caso clínico: Paciente mujer de 40 años acude a la consulta motivada por una preocupación estética debido al oscurecimiento del diente 21. Se proponen varias opciones de tratamiento, hasta que finalmente se opta por el tratamiento de conductos de forma ortógrada, así como blanqueamiento interno del diente. Conclusión: El plan de tratamiento en dientes con metamorfosis cálcica sin patología periapical y con compromiso estético partirá siempre desde el más conservador. Es esencial en el tratamiento de estos dientes la experiencia del operador, así como el buen manejo del microscopio y los ultrasonidos, herramientas fundamentales para su abordaje


Introduction: Calcium metamorphosis commonly occurs after traumatic injuries and is characterized by hard tissue deposits within the pulp space, partially or totally obliterating the pulp chamber and/or the root canal. This process usually causes a change in the color of the clinical crown, making it darker and more opaque. Clinical case: A 40-year-old female patient came to the clinic motivated by an aesthetic concern due to the darkening of the tooth 21. Various treatment options are proposed, until finally the endodontic treatment is chosen, as well as internal bleaching of the tooth. Conclusion: The treatment in teeth with calcium metamorphosis, without periapical pathology and with aesthetic compromise, should always be the most conservative. It is essential in the treatment of these teeth the experience of the operator, as well as the correct use of the microscope and ultrasounds, which are fundamental tools for its approach


Assuntos
Humanos , Feminino , Adulto , Clareamento Dental/métodos , Dente não Vital/terapia , Depósitos Dentários/terapia , Traumatismos Dentários/diagnóstico por imagem , Traumatismos Dentários/terapia , Espectrometria de Fluorescência/métodos , Cavidade Pulpar/diagnóstico por imagem , Tecido Periapical/diagnóstico por imagem
2.
Av. odontoestomatol ; 34(2): 59-71, mar.-abr. 2018. tab
Artigo em Espanhol | IBECS | ID: ibc-172659

RESUMO

El color del órgano dental viene determinado desde el nacimiento, estando determinado por la tonalidad de la dentina aunada a la transparencia y capacidad de refracción de la luz del esmalte. Las descoloraciones den tales son un cambio en el tono, chroma, valor o en la translucidez del diente, puesto que el tejido adamantino es permeable, poco a poco se va tiñendo a causa de diferentes factores externos como pueden ser pigmentos (cromóforos) contenidos en alimentos o bebidas como los tomates, zanahorias, café, té o infusiones varias, que tienden adherirse a los tejidos orgánicos que ocupan los espacios interprismáticos mediante unión química a sus grupos hidroxilo y amino. Además la unión entre estas sustancias pigmentadas y los iones calcio forma nuevas moléculas que varían en tamaño y efecto óptico. Por otro lado numerosos estudios confirman que el tabaco es otro de los factores que alteran el color natural de los dientes, ya sea en cigarrillo, puros, pipa y aún no existe suficiente evidencia sobre el vapor de tabaco. El mecanismo de acción para la decoloración por el tabaco es similar al de los alimentos, salvo que en estos casos se trata de la nicotina, el grupo de alquitranes y el furufral, los cuales se depositan en la superficie dental o incluso llegan a penetrar en los túbulos dentinarios, siendo muy difícil su eliminación. Este tipo de decoloraciones se denominan extrínsecas. Técnicas de blanqueamiento en diferentes formas de aplicación, tiempo, compuestos y su concentración, han demostrado ser suficientes, aunque sin una suficiente evidencia clara y concisa, como vía de mejora del color del diente y lo que esto acarrea


The use of dental implants has become a routine treatment in the clinic. An important prerequisite to ensure proper bone-implant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lastinsthetics and dental implants is essential a firm and lasting cant interface cess in prosthetics and dental implants is essential a firm and lasting cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting tal implants is essential a firm and lasting connecg cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting cant interface cess in prosthetics and dental implants is essential a firm and lasting cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting tal implants is essential a firm and lasting connection to the implant surface and bone. These surfaces can be modified using coatings, different abrasive blasting, or acid treatments, combination of several or all of them


Assuntos
Humanos , Clareamento Dental/métodos , Clareadores Dentários/análise , Descoloração de Dente/terapia , Descoloração de Dente/etiologia , Nicotina/efeitos adversos , Furaldeído/efeitos adversos , Peróxido de Hidrogênio/uso terapêutico
3.
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
4.
Cient. dent. (Ed. impr.) ; 13(3): 199-209, sept.-dic. 2016. tab, graf
Artigo em Espanhol | IBECS | ID: ibc-158868

RESUMO

Introducción: La creciente demanda de estética dental en la sociedad, ha propiciado la venta de dentífricos y colutorios cosméticos sin peróxidos denominados ‘blanqueantes’. Se realiza una revisión de la literatura existente con el fin de esclarecer la eficacia de estos productos sin peróxidos en el aclaramiento o blanqueamiento de los dientes. Material y métodos: Realizamos una búsqueda bibliográfica en las principales bases de datos: Pubmed, Cochrane y Scopus , accediendo al texto completo mediante la red de datos BuCEA de la Universidad Complutense de Madrid. De 158 artículos encontrados, se seleccionan 17, que cumplen nuestros criterios de inclusión: ensayos clínicos aleatorizados, in vivo, en los que los pacientes usan pastas dentífricas y/o colutorios sin peróxidos. Resultados y discusión: Se analizan los resultados teniendo en cuenta si se realiza tinción previa y según la forma de aplicación de los productos blanqueantes (cepillado o enjuague). Destaca la acción de los componentes físicos (sílices) y químicos (de limonene, arginina) de los productos blanqueantes en la remoción y eliminación de manchas, que se ve favorecida por la acción mecánica del cepillado. Según los estudios incluidos en esta revisión, el uso de las productos blanqueantes sin peróxidos eliminan tinciones extrínsecas del diente, aunque no aquellas tinciones intrínsecas. Conclusiones: Son necesarios más estudios clínicos que evalúen el efecto de los productos blanqueantes sin péroxidos en pacientes con las mismas condiciones. También es necesario diferenciar entre el concepto de blanqueamiento por remoción de manchas extrínsecas del blanqueamiento interno conseguido con peróxidos (AU)


Introduction: Nowadays a growing interest in dental esthetic, has provoked an increasing sold of bleaching cosmetics products without peroxides. Because of that we realized a systematyc aproach to distinguish if these products without peroxides are efficient in teeth whitening. Material and Methods: We conduct our search in the most important medical database: Medline, Cochrane and Scopus. We used the database BuCEA of UCM to access to the complete text. From 158 articles, we selected 17 articles which folllow our inclusion criteria: clinical trial, in which patients used toothpastes and mouthwashes without peroxides. Results and discussion: The studies are analyzed in different groups, having in mind if there have been previous teeth tintion and the way of application of the whitening product (mouthwashes or teeth brush). We remarked that both of physical and chemical components of the whitening products removed and eliminated only external spots in teeth enamel. The mechanical action of teethbrushing helps to this effect. Conclusion: More clinical studies are neccessary in order to investigate the effect of these whitening products without peroxides in patients with the same conditions. We should also diferenciate between whitening removing extrinsec spots in the enamel from internal bleaching get by peroxides (AU)


Assuntos
Humanos , Antissépticos Bucais/análise , Dentifrícios/análise , Clareamento Dental/métodos , Clareadores Dentários/análise , Resultado do Tratamento , Peróxidos
5.
Av. odontoestomatol ; 32(6): 309-315, nov.-dic. 2016.
Artigo em Espanhol | IBECS | ID: ibc-158172

RESUMO

En la actualidad, el término odontología mínimamente invasiva es un concepto muy utilizado pero, a veces, de forma errónea. Se define como una filosofía de prevención a la hora de realizar cualquier tratamiento en boca, evaluación de riesgos individualizados, detección precisa y precoz de las lesiones, así como los esfuerzos para remineralizar las lesiones no cavitadas, para su cuidado preventivo y mineralizar las lesiones ya existentes. Esta especie de «disciplina» o procedimiento, se puede desarrollar a partir de varias técnicas y/o instrumentos, como el ultrasonido, air brasion, micro CT o el láser y sus diferentes tipos y aplicaciones. Por ello creemos importante establecer unos principios, bases o protocolo sobre qué es el láser en nuestra profesión y dentro de ella en el campo de nuestra subespecialidad, la odontología Conservadora y que abanico de opciones nos podemos encontrar y como se puede orientar hacia unas indicaciones específicas con las ventajas o desventajas que esto nos pueda acarrear (AU)


Today the term minimally invasive dentistry is a concept widely used, but sometimes incorrectly. It is defined as a philosophy of prevention when making any treatment in the mouth, assessment of individual risks, accurate and early detection of lesions, as well as efforts to remineralize lesions cavitated for preventive care and mineralize injuries already existing. This kind of «discipline» or procedure can be developed from various techniques and/or instruments, such as ultrasound, air brasion, or laser micro CT and its different types and applications. Therefore we believe important to establish principles, bases or protocol on what the laser in our profession and within the field of our subspecialty, conservative dentistry and range of options can find us and how can be directed to specific indications with the advantages or disadvantages that this may bring us (AU)


Assuntos
Humanos , Terapia a Laser/tendências , Procedimentos Cirúrgicos Bucais/tendências , Nanotecnologia/tendências , Procedimentos Cirúrgicos Minimamente Invasivos , Lasers de Excimer/uso terapêutico , Terapia com Luz de Baixa Intensidade/tendências , Clareamento Dental/métodos
6.
Endodoncia (Madr.) ; 33(3): 121-129, jul.-sept. 2015. ilus
Artigo em Espanhol | IBECS | ID: ibc-146584

RESUMO

La avulsión es un desafío para la integridad dental y puede llevar a necrosis pulpar. En vista de estas características, es imperativo una apexificación para obtener una implantación periodontal más larga y un sellado apical adecuado. El siguiente caso clínico describe una reimplantación de un incisivo central avulsionado y el tratamiento de apexificación a través de curativos a base de hidróxido de calcio. Se concluye que la reimplantación asociada con la obturación radicular con mineral trióxido agregado (MTA) en el incisivo central llevó a una exitosa finalización terapéutica


Dental trauma such as avulsion is a challenge to dental integrity and can result in pulp necrosis. When these characteristics are observed, apexification becomes imperative to obtain an adequate apical seal. The objective of this case report is to demonstrate a replantation of an avulsed central incisor and apexification treatment through calcium-hydroxide-based dressing. It is concluded that the replantation associated with a mineral trioxide aggregate (MTA) root obturation in the central incisor led to a successful endodontic procedure


Assuntos
Criança , Humanos , Masculino , Reimplante Dentário/métodos , Incisivo/lesões , Avulsão Dentária/complicações , Necrose da Polpa Dentária/etiologia , Apexificação/instrumentação , Hidróxido de Cálcio/uso terapêutico , Avulsão Dentária/terapia , Ápice Dentário/fisiologia , Radiografia Dentária , Clareamento Dental/métodos
7.
Endodoncia (Madr.) ; 32(3): 126-130, jul.-sept. 2014. ilus
Artigo em Espanhol | IBECS | ID: ibc-131770

RESUMO

Introducción: La calcificación distrófica es la obliteración parcial o total de la cámara pulpar y/o conducto radicular como consecuencia de un traumatismo donde la pulpa reacciona formando dentina reparativa. Resumen: Una paciente de 40 años acude a consulta por molestias a la masticación en dientes 11 y 21 así como por oscurecimiento de los mismos. Tras el examen clínico, radiográfico y mediante tomografía computarizada de haz cónico (TCHC), se observa patología periapical y calcificación distrófica en ambos dientes. Se realiza tratamiento de conductos de forma ortógrada así como blanqueamiento interno de ambos dientes. Conclusión: Con la ayuda de las nuevas tecnologías (TCHC, microscopio, ultrasonidos) aplicadas en el ámbito de la endodoncia, podemos conseguir el éxito en casos clínicos complejos


Introduction: Dystrophic calcification is a total o partial obliteration of pulp chamber and root canal as response to a traumatic injury wherein the pulp reaction is produce reparative dentin. Summary: A 40 years old female presents in our clinic for moderate pain at mastication and darkness in 11 and 21 teeth. After clinic, radiographic and CBCT evaluation, periapical pathology and dystrophic calcification was observed in both teeth. No chirurgical root canal treatment and internal bleaching was made in both teeth. Conclusion: With help of new technologies (CBCT, microscopic, ultrasounds) in endodontics, we can achieve success in complex clinical cases


Assuntos
Humanos , Feminino , Adulto , Descoloração de Dente/terapia , Clareamento Dental/métodos , Endodontia/instrumentação , Tomografia Computadorizada de Feixe Cônico
8.
Cient. dent. (Ed. impr.) ; 10(1): 47-57, ene.-abr. 2013. ilus
Artigo em Espanhol | IBECS | ID: ibc-111951

RESUMO

En esta segunda parte se complementan las pautas y recomendaciones de utilización delas técnicas de blanqueamiento seleccionadas como menos agresivas. También se revisan las técnicas de control de resultados clínicos (medición del color) que pueden ser más aplicables en la clínica odontológica. En ella se presentan cuatro casos clínicos tratados con los principios de actuación defendidos como menos nocivos y unas conclusiones a modo de resumen, tanto dela primera como de la segunda parte (AU)


In this second part, the guidelines and recommendations for use of whitening techniques selected as less aggressive are complemented. The control techniques of clinical results (colour measurement) thatcan be more applicable in the dental clinic are also reviewed. Four clinical cases which are treated with the operational principles defended as less harmful and some conclusions in summarized form, from the first as well as the second part, are presented (AU)


Assuntos
Humanos , Clareamento Dental/ética , Legislação Odontológica/tendências , Padrões de Prática Odontológica/legislação & jurisprudência , Clareadores Dentários/normas
9.
Cient. dent. (Ed. impr.) ; 9(3): 223-232, sept.-dic. 2012. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-107621

RESUMO

El presente trabajo trata de revisar aquellas técnicas de blanqueamiento menos agresivas tanto para los tejidos propios del diente como para los tejidos adyacentes evaluando sus ventajas e inconvenientes frente a otras técnicas más agresivas y que actualmente se encuentran muy difundidas a través de campañas publicitarias muy agresivas, en ocasiones carentes de suficiente sustentación científica. En el mismo presentamos algunos casos clínicos tratados con técnicas de blanqueamiento de baja agresividad, que pueden servir de apoyo a las opiniones que aquí serán vertidas (AU)


This work deals with reviewing those whitening techniques that are less aggressive on tissues of the teeth themselves as well as on the adjacent tissues, evaluating their advantages and disadvantages compared to other more aggressive techniques that are currently disseminated, supported by some very aggressive advertising campaigns and upon occasion lacking sufficient scientific support. In it we present some clinical cases dealing with less aggressive whitening techniques that can serve as support for the opinions that will be presented here (AU)


Assuntos
Humanos , Clareamento Dental/métodos , Clareadores Dentários/análise , Clareamento Dental/ética , Abrasão Dentária/prevenção & controle
10.
Med. oral patol. oral cir. bucal (Internet) ; 17(6): 1082-1088, nov. 2012. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-106110

RESUMO

Objectives: The effect of 15% carbamide peroxide bleaching gel on color stability and surface topography of a giomer and a microfilled composite resin was evaluated in the present in vitro study. Study design: Forty discs measuring 10 mm in diameter and 1 mm in thickness were prepared from a giomer and a microfilled composite resin. Each material yielded 20 discs with completely smooth surfaces. Then a spectrophotometer was used to measure L* (lightness), a* (redness, greenness) and b* (blueness, yellowness) color coordinates of all the discs. Subsequently, the specimens were subjected to 15% carbamide peroxide bleaching gel. After measuring the color coordinates once again, color changes (ÄE*) were calculated by the CIELAB system. Six specimens from each material (three specimens before bleaching agent application and three specimens thereafter) were viewed under an atomic force microscope (AFM) for surface topography evaluation. Data were analyzed by Mann-Whitney U and Kruskal-Wallis tests at á=0.05. Results: There were no statistically significant differences in color changes (ÄE*) between the two materials (P>0.05). In addition, no significant differences were detected in surface roughness between composite resin and giomer discs before and after bleaching (P>0.05 for both). However, in both materials the differences in surface roughness were significant before and after bleaching procedures (P<0.001). Conclusions: Based on the results of the present study it was concluded that 15% carbamide peroxide does not induce clinically detectable color changes in composite resin and giomer despite an increase in surface roughness (AU)


No disponible


Assuntos
Humanos , Clareamento Dental/métodos , Clareadores Dentários/análise , Resinas Compostas/análise , Cimentos de Ionômeros de Vidro/análise , Peróxidos/uso terapêutico
11.
Endodoncia (Madr.) ; 30(3): 111-116, jul.-sept. 2012. tab
Artigo em Espanhol | IBECS | ID: ibc-117125

RESUMO

Objetivo. Fue evaluar la capacidad selladora en la infiltración de colorante en barreras cervicales, utilizadas en el blanqueamiento de dientes tratados endodónticamente, utilizando materiales anteriormente estudiados y el MTA. Material y método. Fueron utilizados 40 dientes extraídos, divididos en 4 grupos, fue realizada la técnica de walking bleach, utilizando como agente blanqueador peróxido de digrogeno asociado al perborato de sodio y un agente trazador (azul de metileno). Después de realizar el tapón cervical con los diferentes materiales manipulados (fosfato de zinc, ionómero de vidrio y la gutapercha asociada al cemento obturador y un paquímetro e inspección visual por 3 examinadores previamente calibrados. Resultados. El MTA presentó menos infiltración que el resto de los materiales utilizados como tapón sin obtener diferencia estadísticamente significante (P=0,154). Conclusiones. El MTA demostró menor infiltración del colorante sobre los demás materiales. Por lo tanto en el análisis de marcadores, el resultado estadístico no fue significante; y en la evaluación, donde fue medida la infiltración lineal de colorante, se obtuvo un resultado significativo del grupo del MTA sobre el grupo control, que fue el de gutapercha asociado al cemento obturador (AU)


Objective. To evaluate the sealing ability of cervical barriers used in whitening teeth treated endodonically, using materials previously studied and the MTA peroxide and sodium perborate associated with a tracer agent (methylene blue). After perfoming the cervical buffer with different materials (zinc phosphate, glass ionomer, gutta-percha associated with cement and MTA) the bleaching agent was used. Next the teeth were sectioned longitudinally to assess the infiltration linear and measure with a pachymetry. Visual inspection was performed by three previously calibrated examiners. Results. The MTA had less infiltration than other materials used as a buffer, without obtaining statistically significant difference (P=0.154). Conclusions. The MTA showed less infiltration of dye than other materials. Therefore in the marker analysis, the result was not statistically significant, and in the evaluation, which was measure by linear infiltration of the dye, we obtained a significant result of the MTA group over the control group, which was gutta- percha associated with a cement (AU)


Assuntos
Humanos , Clareamento Dental/métodos , Dente não Vital , Selantes de Fossas e Fissuras/farmacocinética , Estudos de Casos e Controles , Guta-Percha/análise , Cimentos de Ionômeros de Vidro/análise
13.
Med. oral patol. oral cir. bucal (Internet) ; 16(7): 990-996, .nov. 2011. tab
Artigo em Inglês | IBECS | ID: ibc-93500

RESUMO

Objectives: The aim of this study was to compare the shear bond strength (sbs) of three different adhesives on bleached enamel imm ediately after bleaching, bleached/delayed for 1 week, and bleached/applied antioxidizingagent. Study Design: The enamel surfaces of 144 freshly extracted incisors without any caries and restorations were flattened and divided into 12 groups. The following adhesives were investigated: Optibond FL (OFL) (three-stepetch&rinse), Optibond Solo Plus (OSP) (two-step etch&rinse), Optibond All-in-One (OA) (one-step self-etch),(Kerr, Orange, USA ). Unbleached enamel groups were prepared as negative controls. The remainder surfaces were bleached with 20% Opalescent PF (Ultradent, USA ) 6 h/d for 5 consecutive days. Specimens were bondedimm ediately after bleaching, after 1 week or after using 10% sodium ascorbate gel for 6 hours. After 500 rounds of thermocycling, sbs was measured and data was analyzed with Kruskall-Wallis and Mann-Whitney U-tests (á= 0.05).Results: The sbs decreased for the adhesives after bleaching except for OFL. The effect of applying sodium ascorbatesubsequent to bleaching was not equal for the studied adhesives. While for OFL, sbs of the sodium ascorbategroup was significantly higher than the unbleached control group, for OSP, the sodium ascorbate group had nostatistically significant difference with the unbleached control group and for OA, sbs was significantly lower thanthe unbleached control group.Conclusions: Different adhesives demonstrate different degrees of reversed bond strength subsequent to applyingantioxidant. It seems the method of application and the chemical composition of the adhesives could affect the antioxidant as a reducing agent (AU)


Assuntos
Humanos , Antioxidantes/farmacocinética , Clareamento Dental/métodos , Esmalte Dentário , Clareadores Dentários/farmacocinética , Cimentos Dentários/análise , Permeabilidade do Esmalte Dentário
14.
Med. oral patol. oral cir. bucal (Internet) ; 16(7): 1017-1021, .nov. 2011. ilus
Artigo em Inglês | IBECS | ID: ibc-93504

RESUMO

Objectives: There is some evidence that the pH at the root surface is reduced by intracoronal placement of bleaching pastes, which is known to enhance osteoclastic activity. Therefore, it is recommended that a protective barrierbe used over the canal filling to prevent leak age of bleaching agents. Glass-ionomer (GI) is commonly used asa coronal barrier before nonvital bleaching. Because mineral trioxide aggregate (MTA) creates high alkalinityafter mixing with water, using MTA as a protective barrier over the canal filling may not only prevent leakage of bleaching agents and microorganisms, but may prevent cervical resorption. The aim of this study was to evaluates ealing ability of white mineral trioxide aggregate (WMTA) as a coronal barrier before nonvital bleaching.Study design: Root canals of one hundred thirty human maxillary incisors were instrumented and filled withgutta-percha without sealer. Gutta-percha was removed up to 3 mm below the cementoenamel junction (CEJ). Theteeth were randomly divided into six experimental groups of 20 teeth each and two control groups of 5. In three experimental groups, WMTA was packed into the canal to the level of CEJ. In the remaining experimental groups,glass-ionomer (GI) was used as a coronal barrier. After a 24-hour incubation period, one of the following threebleaching agents was placed in the access cavity of each of the WMTA or GI groups. These three bleaching agentswere 30% hydrogen peroxide, sodium perborate mixed with 30% hydrogen peroxide, and sodium perborate mixedwith distilled water. The bleaching agents were replaced every 3 days for three times. In the positive controls, no (..) (AU)


Assuntos
Humanos , Cimentos de Ionômeros de Vidro/farmacocinética , Selantes de Fossas e Fissuras/farmacocinética , Clareadores Dentários/farmacocinética , Clareamento Dental/métodos , Dente não Vital
15.
Med. oral patol. oral cir. bucal (Internet) ; 16(6): 845-851, sept. 2011. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-93101

RESUMO

Objective: In vitro comparison of the efficacy of two bleaching procedures, one based on carbamide peroxide (CP)and the other on hydrogen peroxide (HP), simulating clinical conditions.Study Design: Two groups of 20 teeth in each group were selected. Group A: 22% CP, one hour a day for 21 consecutivedays. Group B: 37.5% HP, in 2 treatment sessions with an one week interval between each session. At eachsession the product was applied three successive times for eight minutes. Colour was recorded before treatment,when it was finished and one week after finishing it, with the Vita EasyShade spectrophotometer. CIEL*a*b* andΔE were established at each moment in the study. Intra-group data was compared using the paired t-test and intergroupdata with the independent groups t-test. Scores from the Vita Classical guide provided with the device wererecorded and the colour improvement percentage was calculated.Results: In both groups significant whitening was achieved by the end of treatment. Lightness remained significantlyhigh when treatment was finished and one week after in both groups. The percentage of bleaching wassignificantly higher in group A.Conclusions: Both 22% CP and 37.5% HP were effective for bleaching teeth. Bleaching effect was greater in CPgroup (AU)


No disponible


Assuntos
Humanos , Clareamento Dental/métodos , Clareadores Dentários/farmacocinética , Peróxido de Hidrogênio/farmacocinética , Peróxidos/farmacocinética
16.
Endodoncia (Madr.) ; 28(2): 79-85, abr.-jun. 2010. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-102096

RESUMO

Objetivo: el propósito de este estudio fue evaluar el sellado marginal de diferentes materiales intracoronalmente después de la amputación parcial de la raíz hasta una profundidad de 5mm. Los especímenes se dividieron en siete grupos de 30 premolares cada uno. Una pasta blanqueadora acondicionada con azul de metileno se colocó con un espesor de 2mm y el resto de la cavidad fue obturada con diferentes materiales: Resina compuesta, lonómero de Vidrio, IRM, Fosfato de Zinc, Cavit R, Provisit y Carboxilato. Fueron almacenadas en solución salina durante ocho días. El sellado marginal se evaluó mediante una tabla de valores y fueron analizados con la prueba X2. Resultados: Los resultados revelaron el mejor sellado marginal para el CAvit R (p.001) y resina compuesta (p.0,05), y el sellado más pobre para IRM y fosfato de zinc. Conclusiones: Bajo las condiciones de este estudio concluimos que el Cavit R y la resina comuesta ofrecieron un mejor sellado marginal durante el blanqueamiento ambulatorio (AU)


Objective: The purpose of this study was to evaluate the marginal seal of various materials used in the cavity during the bleaching. Material and Methods: We included 210 human premolars of arches which were prepared intracrowne after partial amputation of the root to a depth of 5mm. The specimens were divided into seven groups of 30 premolars each. Subsequently, the pulp bleaching fitted with methylene blue was placed with a thickness of 2 mm and the rest of the cavity was sealed with different materials: composite resin, glass ionomer, IRM, zinc phosphate, Cavit R, Provisit and carboxylate. Were stored in saline solution for eight days. The marginal seal was evaluated through a table of values, data were analyzed with the X2 test. Results: The results showed the best marginal seal for Cavit R (p<0,01) and resin composite (p<0,05) groups and poorer sealing for IRM and Zinc Phosphate. Conclusion: Under the conditions of this study concluded that R Cavit and resin composite provided a better marginal seal during the bleaching (AU)


Assuntos
Humanos , Clareamento Dental/métodos , Clareadores Dentários/análise , Selantes de Fossas e Fissuras/análise , Infiltração Dentária/diagnóstico
17.
Med. oral patol. oral cir. bucal (Internet) ; 15(2): 413-416, mar. 2010. tab
Artigo em Inglês | IBECS | ID: ibc-80253

RESUMO

Objective: This study evaluates the effect of calcium hydroxide dressing on microleakage of composite restorationsfollowing non-vital bleaching. Methods: A total of 45 sound extracted human maxillary central incisorsunderwent endodontic treatment. The teeth were randomly divided into three groups (n=15). In group 1, accesscavities were restored with composite. In group 2, the teeth underwent a bleaching procedure for one week beforebeing restored with composite. In group 3, following a bleaching procedure, calcium hydroxide paste was placedin the pulp chamber for one week. The teeth were then restored with composite. The specimens were subjected toa dye leakage test. The data was analyzed using Kruskal-Wallis and Mann-Whitney U tests. Results: There weresignificant differences between the groups (P<0.0005). No statistically significant differences were found betweengroups 2 and 3, while the differences between other groups were significant. Conclusions: The bleaching agentincreased microleakage of composite restorations in non-vital bleaching, whereas microleakage was not found tobe increased by calcium hydroxide (AU)


Assuntos
Humanos , Bandagens , Clareamento Dental , Dente não Vital , Hidróxido de Cálcio/farmacologia , Infiltração Dentária/induzido quimicamente
18.
Cient. dent. (Ed. impr.) ; 6(1): 69-71, ene.-abr. 2009. ilus
Artigo em Espanhol | IBECS | ID: ibc-74079

RESUMO

Se trata de blanquear dos incisivos superiores oscurecidos por un traumatismo antiguo. El diente 21 fue endodoncia do, pero el diente 22 no. El incisivo lateral izquierdo en la RVG aparece con el conducto totalmente obliterado. Se perforó la cámara pulpar de dicho diente y se blanqueó con peróxido de hidrógeno al 35%, obteniendo un buen resultado en 2 sesiones (AU)


We try to bleach two superior incisives, they were dark caused by a traumatism. The 21 teeth had a root canal treatment, the 22teeth had not. The left lateral incisive appears with the canal complety obliterated at the Xray exploration. We bleached it with hydrogeneperoxide at 35% and we got good results in two sessions (AU)


Assuntos
Humanos , Masculino , Adulto , Clareamento Dental/métodos , Peróxido de Hidrogênio/uso terapêutico
19.
Med. oral patol. oral cir. bucal (Internet) ; 13(4): 266-269, abr. 2008. ilus
Artigo em Inglês | IBECS | ID: ibc-67384

RESUMO

No disponible


Objectives: Treatment of dental discolorations with external bleaching is becoming very common in dentistry, however, possible irreversible alterations on enamel surface due to bleaching procedures is a topic of discussion. The aim of this study was to evaluate the clinical effects of bleaching by measuring the dental plaque accumulation on human enamel and tooth discoloration in vivo. Study Design: Forty-four teeth in eleven patients not revealing any restorations or periodontal problems were enrolled in this study. Bleaching agent applied only to labial surfaces of incisors using commercial 35 % hydrogen peroxide gel. Dental plaque and tooth color measured in the same group of participants, at the end of non-brushing periods lasting 3 and 5 days, respectively, before and after bleaching.Results: The results of the comparison of pre- and post-bleaching measurements showed that, after a non-brushingperiod lasting 3 day, discoloration scores and plaque accumulation scores for bleached surfaces were lower than the non-bleached surface scores. However, at the end of a non-brushing period lasting 5 day, even the color measurement score in post-bleaching period was lower than the pre-bleaching counterpart, plaque index measurements showed higher plaque accumulation scores in the bleached group.Conclusions: According to these results, bleaching with 35 % hydrogen peroxide seem to favor plaque accumulation after non-brushing period lasting 5 day and tooth discoloration after bleaching is not in correlation with the amount of plaque accumulation


Assuntos
Humanos , Clareamento Dental , Peróxido de Hidrogênio/farmacocinética , Índice de Placa Dentária , Descoloração de Dente/tratamento farmacológico
20.
Dentum (Barc.) ; 7(3): 113-117, jul.-sept. 2007. ilus
Artigo em Espanhol | IBECS | ID: ibc-65794

RESUMO

El dióxido de circonio, también conocido como, zirconio o badeleyitaes un material cerámico blanco cristalino de los más estudiados. Requiere la agregación de estabilizadores, teniendo el óxido de y trioamplia aplicación en odontología. En sus inicios, su uso estuvo enfocado como: material refractario, cerámica de vidrio, o como componente de partes desarrollada por la industria aeroespacial. Actualmente, su uso en medicina está muy difundido. El titanio y las aleaciones metálicas usadas en odontología restauradora e implantológica pueden tener un efecto negativo sobre el metabolismo celular, pudiendo causar daños. Este hecho, al parecerse convierte en el principal motivo para ir en busca de materiales libres de metal, incluso para su aplicación en implantes dentales. Dentro de las principales propiedades positivas tenemos: biocompatibilidad, biofuncionalidad, estética, adecuada conducta mecánica, resistencia a la temperatura, reducida tendencia corrosiva, baja solubilidad; incrementando nuestras posibilidades de obtener la satisfacción del paciente desde todo punto de vista (AU)


Zirconium dioxide, sometimes known as zirconia or baddeleyite, is a white crystalline oxide of zirconium is one of the most studied ceramic materials. Several different oxides are added to zirconia to stabilize, but in dentistry the yttrium oxide is the main element. Initially it’s use was focused as a refractory material, ceramic glazes and in the aerospace industry, nowadays find application in the medicine. The titanium and metal alloys used in restorative and implant dental can have a negative influence on cell metabolism and hence can cause some damage. This appear to be the main reason for the search of new metal-free materials, including dental implants. The positive materials properties of dioxide zirconium include: biocompatibility, biofunctionality, aesthetic, adequate mechanical behaviour, good temperature resistance, reduced tendency towards corrosion, low solubility, increased our chances to obtain patient’s satisfaction from all standpoint (AU)


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Zircônio/uso terapêutico , Materiais Dentários/metabolismo , Materiais Dentários/uso terapêutico , Titânio/uso terapêutico , Implantes Dentários , Clareamento Dental/instrumentação , Clareamento Dental/métodos , Prostodontia/métodos , Zircônio/administração & dosagem , Materiais Dentários/provisão & distribução , Má Oclusão/epidemiologia , Estética Dentária/classificação , Estética Dentária/economia
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