ABSTRACT
Premixed calcium silicate cements (pCSCs) contain vehicles which endow fluidity and viscosity to CSCs. This study aimed to investigate the effects of three vehicles, namely, polyethylene glycol (PEG), propylene glycol (PG), and dimethyl sulfoxide (DMSO), on the physicochemical properties and biocompatibility of pCSCs. The setting time, solubility, expansion rate, and mechanical strength of the pCSCs were evaluated, and the formation of calcium phosphate precipitates was assessed in phosphate-buffered saline (PBS). The effects of pCSC extracts on the osteogenic differentiation of mesenchymal stem cells (MSCs) were investigated. Finally, the tissue compatibility of pCSCs in rat femurs was observed. CSC containing PEG (CSC-PEG) exhibited higher solubility and setting time, and CSC-DMSO showed the highest expansion rate and mechanical strength. All pCSCs generated calcium phosphate precipitates. The extract of CSC-PG induced the highest expressions of osteogenic markers along with the greatest calcium deposites. When implanted in rat femurs, CSC-PEG was absorbed considerably, whereas CSC-PG remained relatively unaltered inside the femur.
Subject(s)
Dimethyl Sulfoxide , Osteogenesis , Materials Testing , Calcium Compounds/pharmacology , Calcium Compounds/chemistry , Calcium Phosphates/pharmacology , Calcium Phosphates/chemistry , Silicates/pharmacology , Silicates/chemistry , Calcium , Silicate Cement/chemistry , Dental Cements/pharmacology , Dental Cements/chemistryABSTRACT
OBJECTIVE: The study aims to evaluate the effect of a glass ionomer cement (GIC; Fuji 9 Gold Label, GC) with added calcium orthophosphate particles and a calcium silicate cement (CSC; Biodentine, Septodont) regarding ion release, degradation in water, mineral content, and mechanical properties of demineralized dentin samples. METHODS: GIC, GIC + 5% DCPD (dicalcium phosphate dihydrate), GIC + 15% DCPD, GIC + 5% ß-TCP (tricalcium phosphate), GIC + 15% ß-TCP (by mass), and CSC were evaluated for Ca2+/Sr2+/F- release in water for 56 days. Cement mass loss was evaluated after 7-day immersion in water. Partially demineralized dentin disks were kept in contact with materials while immersed in simulated body fluid (SBF) at 37 °C for 56 days. The "mineral-to-matrix ratio" (MMR) was determined by ATR-FTIR spectroscopy. Dentin hardness and elastic modulus were obtained by nanoindentation. Samples were observed under scanning and transmission electron microscopy. Data were analyzed by ANOVA/Tukey test (α = 0.05). RESULTS: Ca2+ release from CSC and GIC (µg/cm2) were 4737.0 ± 735.9 and 13.6 ± 1.6, respectively. In relation to the unmodified GIC, the addition of DCPD or ß-TCP increased ion release (p < 0.001). Only the dentin disks in contact with CSC presented higher MMR (p < 0.05) and mechanical properties than those restored with a resin composite used as control (p < 0.05). Mass loss was similar for GIC and CSC; however, the addition of DCPD or ß-TCP increased GIC degradation (p < 0.05). CONCLUSION: Despite the increase in ion release, the additional Ca2+ sources did not impart remineralizing capability to GIC. Both unmodified GIC and CSC showed similar degradation in water. CLINICAL RELEVANCE: CSC was able to promote dentin remineralization.
Subject(s)
Calcium Compounds , Calcium Phosphates , Calcium , Glass Ionomer Cements , Silicates , Glass Ionomer Cements/pharmacology , Glass Ionomer Cements/chemistry , Calcium/analysis , Phosphates/analysis , Silicate Cement/analysis , Silicate Cement/pharmacology , Dentin , Water/chemistry , Materials TestingABSTRACT
Aim: This study aimed to perform an in vitro comparative analysis of the antifungal activity of different calcium silicate-based endodontic sealers against three fungal species. Methods: The antifungal properties of three calcium silicate-based sealers were tested: Bio-C Sealer, Cambiar a Sealer Plus BC, and MTA-Fillapex. Two commonly used sealers were used as controls: AH Plus and Endomethasone. An agar diffusion test was performed to analyze the antifungal activity of the sealers against Candida albicans, Candida glabrata, Candida tropicalis, and a mixed microbial culture medium. The results were analyzed using ANOVA (p <0.05). Results: Endomethasone exhibited the highest inhibition against all strains examined, maintaining a consistent level of inhibition throughout 7 days. MTA-Fillapex demonstrated the best performance among the calcium silicate-based sealers for the three fungal species (p < 0.05), maintaining stable values over the 7 days, surpassing that of Endomethasone. Nevertheless, MTA-Fillapex only exhibited antimicrobial effect against the mixed culture for the first 24 hours, and no antimicrobial activity was observed at 48 hours, being surpassed by all tested sealers (p < 0.05). Conclusion: Of all silicate-based sealers tested, only MTA-Fillapex exhibited promising antifungal activity. Nevertheless, care must be taken when extrapolating these results, as MTA-Fillapex exhibited poor antimicrobial activity when tested in mixed microbial cultures
Subject(s)
Root Canal Filling Materials , Silicate Cement , Bacteria , Candida albicans , Candida glabrata , Candida tropicalis , Endodontics , Antifungal Agents/analysisABSTRACT
Introdução: os cimentos endodônticos obturadores à base de silicato de cálcio têm sido amplamente utilizados na endodontia, principalmente em razão de suas reconhecidas propriedades bioativas. Como consequência, uma quantidade expressiva de marcas comerciais foi lançada no mercado, dificultando a compreensão do profissional, principalmente no que diz respeito às diferentes composições químicas, apresentações, formas de uso e custo-benefício. Objetivos: o Objetivo deste trabalho foi analisar as diferenças composicionais, técnicas (indicações e apresentação comercial) e comerciais (custo e disponibilidade de venda) dos cimentos endodônticos obturadores à base de silicato de cálcio, disponíveis para uso e comercialização no Brasil. Metodologia: foi realizada uma busca sistemática no site da Anvisa, sendo identificados sete cimentos endodônticos obturadores biocerâmicos para uso no Brasil. As bulas dos produtos foram analisadas para verificação de composição, apresentação e indicação de uso. Sites especializados foram consultados para verificação de preço dos produtos. Resultados: observou-se que a composição química varia bastante, a depender do fabricante, sendo os silicatos tricálcico e dicálcico os componentes mais frequentes. A maioria dos cimentos é apresentada comercialmente pronta para uso, e possui óxido de zircônio como agente radiopacificador. A venda através de sites especializados ainda é restrita a alguns produtos, e o custo varia de acordo com a quantidade de material por embalagem. Conclusão: este trabalho apresentou as características composicionais, técnicas e comerciais de sete cimentos endodônticos obturadores à base de silicato de cálcio registrados na ANVISA e autorizados para uso no Brasil.
Introduction: calcium silicate-based endodontic sealers have been widely used in endodontics, mainly because of their recognized bioactive properties. As a result, a significant number of commercial brands were launched on the market, making it difficult for professionals their comprehension, especially with regard to different chemical compositions, presentations, forms of use and cost-effectiveness. Objective: the Objective of this work was to analyze the compositional, technical (indications and commercial presentation) and commercial (cost and availability) differences of calcium silicate-based endodontic sealers, available for use and commercialization in Brazil. Methodology: a systematic search was carried out on the Anvisa website, and seven bioceramic endodontic sealers for use in Brazil were identified. Product leaflets were analyzed to verify composition, presentation and indication of use. Specialized websites were consulted to verify the price of the products. Results: it was observed that the chemical composition varies a lot, depending on the manufacturer, with tricalcium and dicalcium silicates being the most frequent components. Most sealers are commercially available ready-to-use, and have zirconium oxide as a radiopacifying agent. The sale through specialized websites is still restricted to some products, and the cost varies according to the amount of material per package. Conclusion: this work presented the compositional, technical and commercial characteristics of seven calcium silicate-based endodontic sealers registered at ANVISA and authorized for use in Brazil.
Subject(s)
Root Canal Filling Materials , Root Canal Obturation , Silicate Cement , Calcarea Silicata , Dental Cements , EndodonticsABSTRACT
Abstract Cetrimide (CTR) is a cationic surfactant detergent with antimicrobial and antibiofilm activity. The aim of this study was to evaluate setting time, pH, solubility and antibiofilm activity of tricalcium silicate cement (TSC) with zirconium oxide (ZrO2) and its association with 0.2 and 0.4% cetrimide. Initial and final setting times (IST and FST) were assessed based on ISO-6876. pH was evaluated at periods of 1,3,7,14 and 21 days. Solubility was analyzed by weight loss. A modified direct contact test (MDCT) on the biofilm of Enterococcus faecalis formed on bovine root dentin blocks was performed, after 6 hours of manipulation and 15 hours of contact time. The analysis was performed by UFC mL ¯¹ counting. The data were analyzed by ANOVA and Tukey's tests (α=0.05). Higher IST was observed for TSC/ZrO2+CTR in both concentrations than for TSC/ZrO2 and lower FST for TSC/ZrO2+0.4% CTR (p0.05). All materials exhibited increased mass. TSC/ZrO2+CTR 0.4% had lower mass gain than the other materials (p<0.05). The highest antibiofilm activity was observed for TSC/ZrO2+CTR in both concentrations, when compared with the positive control (p<0.05). In conclusion, CTR exhibited potential to promote greater antibiofilm activity to tricalcium silicate cement, without harming its physicochemical properties of setting time, pH and solubility.
Resumen Cetrimida (CTR) es un detergente y surfactante catiónico con actividad antimicrobiana y antibiofilm. El objetivo de este estudio fue evaluar el tiempo de fraguado, pH, solubilidad y actividad antibiofilm del cemento de silicato tricálcico (CST) con óxido de zirconio (ZrO2) y su asociación con CTR a 0.2% y 0.4%. Tiempo de fraguado inicial y final (TFI y TFF) fueron determinados con base en las normas ISO-6876. pH fue evaluado en los períodos de 1,3, 7,14 y 21 días. Solubilidad fue analizada por la pérdida de masa/peso. El test de contacto directo modificado (TCDM) fue realizado sobre biofilm de Enterococcus faecalis formado en dentina radicular bovina, después de 6 horas de manipulación de los cementos y 15 horas de contacto. El análisis fue realizado por la cuantificación de UFC mL¯¹. Los datos fueron analizados usando las pruebas de ANOVA y Tukey (α=0.05). Mayor TFI fue observado para CST/ ZrO2+CTR en las dos concentraciones que para TSC/ZrO2 y menor TFF para TSC/ ZrO2+CTR 0.4% (p0.05). Todos los materiales mostraron aumento de masa. TSC/ZrO2+CTR 0.4% tuvo menor gano de masa que los otros materiales (p<0.05). Mayor actividad antibiofilm fue observado para CST/ZrO2+CTR en las dos concentraciones, cuando comparados con el grupo control positivo (p<0.05). En conclusión, CTR demostró potencial para promover superior actividad antibiofilm al cemento de silicato tricálcico (CST), sin perjudicar sus propiedades físico-químicas de tiempo de fraguado, pH y solubilidad.
Subject(s)
Silicate Cement/analysis , Dental Plaque , Cetrimonium/analysisABSTRACT
esumen Objetivo: Comparar la microdureza de dos materiales endodónticos a base de silicato de calcio: MTA Densell Endo Sealer y TotalFill BC Sealer. Materiales y métodos: Se evaluó la microdureza de los selladores MTA Densell Endo Sealer (Grupo 1, n=5) y To- talFill BC Sealer (Grupo 2, n=5) contenidos en cilindros de dentina de vacuno a los 14 días posteriores a su fraguado. La medición se realizó a temperatura ambiente mediante la prue- ba de indentación Vickers. Se realizaron cinco indentaciones por probeta con una carga de 100 g durante 10 s cada una. Las mediciones se convirtieron a valores de dureza Vickers (HV) y los promedios de los valores HV de cada grupo se compararon por medio de la prueba t de Student con un nivel de significación de P <0,05. Resultados: A los 14 días, luego del fraguado, la mi- crodureza de MTA Densell Endo Sealer fue significativamen- te mayor (P=0,001) que la de TotalFill BC Sealer. Conclusiones: Los resultados sugieren que a causa de su dureza la remoción de MTA Densell Endo Sealer puede resultar dificultosa cuando está indicado un retratamiento (AU)
Aim: To compare the microhardness of two silicate-based endodontic materials: MTA Densell Endo Sealer and Total Fill BC Sealer. Materials and methods: Samples of MTA Densell Endo Sealer (Group 1, n=5) and Total Fill BC Sealer (Group 2, n=5) contained into cow dentine cylinders were subjected to the Vickers Microhardness Indentation test at room temper- ature and 14 days after setting. Five indentations per sample were performed under a load of 100 g for 10 s. The indenta- tion measurements were converted into hardness values (HV). Mean HV values of each group were compared using the Stu- dent t test at a significance level of P <0,05. Results: 14 days after setting, the microhardness of MTA Densell Endo Sealer was significantly greater (P=0,001) than that of Total Fill BC Sealer. Conclusions: The results of this study suggest that due to its hardness the removal of MTA Densell Endo Sealer could be difficult to perform when a root canal retreatment is indicated (AU)
Subject(s)
Root Canal Filling Materials , Silicate Cement , Hardness Tests , Materials TestingABSTRACT
Introdução: A perfuração radicular é um acidente técnico-operatório que resulta em comunicação da cavidade pulpar com os tecidos periodontais. Esse tipo de acidente pode apresentar prognóstico desfavorável, por afetar significativamente o soalho da câmara coronária ou os terços cervical, médio e apical do canal radicular. Entre os fatores que interferem no prognóstico das perfurações radiculares, destacam-se: localização, extensão, presença ou ausência de bolsa periodontal; tempo decorrido entre a perfuração e o tratamento; e tipo de material obturador. Nesse contexto, os cimentos obturadores de canais denominados biocerâmicos surgiram como uma proposta inovadora para tratamento de perfurações antes consideradas de prognóstico desfavorável. Objetivo: O presente trabalho teve por objetivo relatar o tratamento de uma perfuração radicular em molar inferior com o cimento biocerâmico EndoSequence BC Sealer, com três anos de acompanhamento. Resultados: As imagens radiográficas e os dados clínicos do paciente evidenciaram o sucesso no tratamento da perfuração, com reparo da lesão perirradicular. Conclusão: O cimento endodôntico biocerâmico EndoSequence BC Sealer associado com a retomada do trajeto original do conduto e sua instrumentação favoreceram o reparo dos tecidos perirradiculares, sugerindo propriedades biológicas promissoras de compatibilidade e bioativida (AU).
Introduction: Root perforation is a technical-surgical accident that results in communication of the pulp cavity with periodontal tissues. This type of accident may have an unfavorable prognosis because it significantly affects the floor of the coronary chamber or the cervical, middle and apical thirds of the root canal. Factors that interfere with the prognosis of root perforations include location, extension, presence or absence of periodontal pocket, time elapsed between perforation and treatment, and type of obturator material. In this context, bioceramic canal sealers have emerged as an innovative proposal for treatment of perforations previously considered to have an unfavorable prognosis. Objective: The aim of this study was to report the treatment of a lower molar root perforation with the EndoSequence BC Sealer bioceramic sealer after a 3-year follow up. Results: Radiographic images and patient clinical data showed success in the treatment of perforation with repair of the periradicular lesion. Conclusion: Endo-Sequence BC Sealer bioceramic endodontic sealer associated with the resumption of the original conduit path and its instrumentation favored the repair of periradicular tissues, suggesting promising biological properties of compatibility and bioactivity (AU).
Subject(s)
Humans , Root Canal Obturation , Silicate Cement , Conservative Treatment , Molar , Biological Products , Dental Pulp CavityABSTRACT
Introduction: This study aims to analyze the influence of particles size of sol-gel derived calcium silicate particles in the setting reaction of bioactive endodontic cements. Materials and Methods: Sol-gel derived calcium silicate particles were synthesized and sieved to separate the particles in different sizes: CS400, CS200, and CS100. A commercial MTA (Control) was used as control. The particle size and the specific surface area were assessed by laser diffraction and nitrogen adsorption. The cements were prepared with water as the liquid for the reaction. The setting time was conducted according to ISO 6876, and the setting kinetics was analyzed by Fourier trans-formed infrared spectroscopy (FTIR) at different time points between 120s to 72h. Results: The particle size varied from 9.45µm (CS400 ) to 31.01 (Control). The higher specific surface area valuer reached 15.14g/cm2 in the CS400. The smallest particle sizes, the higher specific surface area, and the lowest setting time were found for CS400 (p < 0.05). Control presented the highest setting time (p < 0.05). The FTIR analyses showed the differences in materials structure over time, with faster hydration and crystallization for CS400. The setting kinetics was slower for Control even when compared to a sol-gel derived group with similar particle size. Conclusion:The route of synthesis and the particle size influences the setting reaction of calcium silicate-based cements. The reduction of particle size for sol-gel derived calcium silicates lead to the acceleration of the setting reaction of the produced bioactive endodontic cement.
Introdução: Este estudo tem como objetivo analisar a influência do tamanho de partículas de silicato de cálcio derivadas de sol-gel na reação de presa de cimentos endodônticos bioativos. Materiais e Métodos: Partículas de silicato de cálcio derivadas de sol-gel foram sintetizadas e peneiradas para separar as partículas em diferentes tamanhos: CS400, CS200 e CS100. Um MTA comercial (Controle) foi usado como controle. O tamanho das partículas e a área superficial específica foram avaliados por difração a laser e adsorção de nitrogênio. Os cimentos foram preparados com água como líquido para a reação. O tempo de presa foi conduzido de acordo com a ISO 6876, e a cinética de presa foi analisada por espectroscopia de infravermelho transformada de Fourier (FTIR) em diferentes pontos de tempo entre 120s a 72h. Resultados: O tamanho de partícula variou entre 9,45µm (CS400) e 31,01 (Controle). A maior área de superfície foi encontrada nas partículas do grupo CS400 (15.14g/cm2). Os menores tamanhos de partícula, a maior área de superfície específica e o menor tempo de presa foram encontrados para CS400 (p < 0,05). O Control apresentou o maior tempo de presa (p < 0,05). As análises de FTIR mostraram as diferenças na estrutura dos materiais ao longo do tempo, com hidratação e cristalização mais rápidas para CS400. A cinética de presa foi mais lenta para Control mesmo quando comparado a um grupo derivado de sol-gel com tamanho de partícula semelhante. Conclusão: A rota de síntese e o tamanho das partículas influenciam a reação de endurecimento dos cimentos à base de silicato de cálcio. A redução do tamanho de partícula para silicatos de cálcio derivados de sol-gel leva à aceleração da reação de pega do cimento endodôntico bioativo produzido.
Subject(s)
Particle Size , Silicate Cement/analysis , Calcarea Silicata , Materials Science , Spectroscopy, Fourier Transform Infrared , Fourier AnalysisABSTRACT
Las piezas con necrosis pulpar y ápice abierto son un desafío de la práctica clínica endodóntica. Durante mucho tiempo estas piezas han sido tratadas con la técnica de apexificación con hidróxido de calcio. Esta técnica estimula la formación de una barrera calcificada a nivel apical, pero a partir de varias sesiones de tratamiento y los riesgos asociados que esto conlleva. Hoy en día, con el desarrollo de nuevas tecnologías, están a disposición materiales biocerámicos que permiten realizar el protocolo en una sola sesión. El Biodentine es un biocerámico con tiempo de fraguado corto y buena capacidad de sellado, que permite reducir los tiempos clínicos. El objetivo de este trabajo es presentar un caso clínico de una pieza dentaria diagnosticada con necrosis pulpar y con apicoformación incompleta, tratada con una técnica de apexificación con Biodentine en una sesión (AU)
Subject(s)
Humans , Male , Adolescent , Biocompatible Materials , Ceramics , Apexification/methods , Argentina , Schools, Dental , Silicate Cement , Calcium Hydroxide , Clinical Protocols , DentinABSTRACT
Objetivo: Presentar un caso clínico de dos premolares inferiores con perforación radicular iatrogénica obturadas con Biodentine. Caso clínico: Una paciente de 54 años de edad fue derivada para realizar el tratamiento endodóntico en las piezas dentarias 44 y 45. Los exámenes clínico y radiográfico revelaron la presencia de perforaciones radiculares, cuya localización fue confirmada por medio de una tomografía computarizada de haz cónico. Luego de la desinfección y la instrumentación de los conductos radiculares, ambas perforaciones fueron selladas con Biodentine. Finalmente, los conductos fueron obturados, y las cavidades de acceso, restauradas con resina compuesta. Una semana después los dientes se encontraban asintomáticos y sin tumefacción. La paciente fue controlada nuevamente a los 20 meses postratamiento. Al examen clínico, ambos dientes estaban asintomáticos y funcionales. No hubo signos de infección, inflamación o sensibilidad a la percusión y la palpación. Las imágenes radiográficas y tomográficas revelaron espacio periodontal y cortical ósea normales. Conclusión: En el presente caso clínico, el Biodentine resultó un material adecuado para la obturación de perforaciones radiculares de origen iatrogénico ubicadas en la unión de los tercios medio y coronal (AU)
Aim: To present a clinical case of two lower premolars with iatrogenic root perforations in which both defects were repaired with Biodentine. Clinical case: A healthy 54-year old female was referred for endodontic treatment of teeth number 44 and 45. Clinical and radiographic examination revealed the presence of root perforations whose buccal localization was confirmed by a cone beam computed tomography scan. After the root canals were instrumented, both perforations were filled with Biodentine. The canals were obturated and the endodontic accesses were restored. A week later, the teeth were asymptomatic and without the presence of swelling. The patient was recalled 20-months after treatment and both teeth were asymptomatic and functional with no signs of infection, inflammation or sensitivity to percussion and palpation. Radiograph and cone beam computed tomography images showed a normal periodontal width and an intact lamina dura. Conclusion: Based on the outocome of this clinical case, Biodentine was an adequate material to repair iatrogenic root perforations (AU)
Subject(s)
Humans , Female , Middle Aged , Root Canal Filling Materials/therapeutic use , Silicate Cement/therapeutic use , Tooth Root/injuries , Iatrogenic Disease , Root Canal Therapy , Signs and Symptoms , Bicuspid/diagnostic imaging , Treatment Outcome , Cone-Beam Computed TomographyABSTRACT
Introdução: Acidentes e complicações podem acontecer em qualquer fase do tratamento endodôntico. Podem ocorrer devido a diversos fatores, como falhas dos instrumentos, dificuldades anatômicas e limitações do profissional, o que, muitas vezes, pode alterar o prognóstico de um caso. Objetivo: O presente relato de caso aborda uma situação em que uma paciente se apresentava com dois instrumentos fraturados e uma perfuração radicular em um dente molar inferior com periodontite apical. Relato do caso: Os fragmentos foram removidos por meio de técnica mecanizada e ultrassônica padronizada, e a perfuração foi tratada e selada com material à base de silicato de cálcio. Conclusão: O emprego de recursos tecnológicos atuais favoreceu a resolução do caso, melhorando seu prognóstico. O restabelecimento da condição de normalidade do dente e tecidos adjacentes foi confirmado por exames radiográficos e tomográficos (AU).
Introduction: Accidents and complications may happen at any endodontic treatment stage. These are likely to change the prognosis of treatment and can be due to factors related to instrumental failure, anatomic difficulties and the professional's limitations. Objective: This case report addresses a case where a patient presenting two separated instruments and a root perforation in a lower molar with apical periodontitis. Case report: The separated instruments have been removed by mechanical and ultrasonic standardized method and the perforation was treated and sealed by silicate cement-based material. Conclusion: The use of technological resources favored the resolution of the case, increasing its predictability. The reestablishment of the normal condition of the tooth and surrounding tissues was confirmed by radiograph and computed tomography exams (AU).
Subject(s)
Humans , Female , Root Canal Therapy , Silicate Cement , Technology , Ultrasonic Therapy , Calcium , Retreatment , MolarABSTRACT
Objetivo: Comparar la capacidad de sellado de dos materiales para obturación retrógrada en dientes permanentes unirradiculares: el agregado de trióxido mineral (MTA®) y el silicato tricálcico (Biodentine®). Materiales y métodos: Se seleccionaron 38 dientes permanentes unirradiculares con cierre apical completo, los cuales fueron divididos aleatoriamente en dos grupos experimentales (n = 15): Grupo 1: MTA®, Grupo 2: Biodentine®. Además, se usaron controles positivos y negativos. El tratamiento radicular se realizó con el sistema rotatorio Mtwo y la obturación mediante el sistema termoplástico de onda continua (Beefill), y se usó como sellador el cemento tipo Grossman. Se realizó la apicectomía del extremo apical, luego la preparación de cavidades retroapicales estandarizadas y las respectivas obturaciones con MTA® y Biodentine®, según grupo. Posteriormente, los especímenes se sometieron a un proceso de filtración apical de tinta china y de transparentación, mientras que la filtración apical fue evaluada por medio de un microscopio estereoscópico. Los datos fueron analizados con la prueba U de Mann-Whitney. Resultados: El análisis inferencial mostró que Biodentine® tuvo una menor microfiltración que el MTA®, con una diferencia estadísticamente significativa al 95% (p < 0,034). Conclusión: El cemento Biodentine® mostró una mayor capacidad de sellado a nivel apical que el cemento MTA® en obturaciones retrógradas de dientes unirradiculares ex vivo. (AU)
Aim: To compare the sealing capacity of mineral trioxide (MTA®) and tricalcium silicate (Biodentine®) for retrograde filling in single-root permanent teeth. Materials and methods: Thirty-eight permanent single-root teeth with complete apical closure were selected and randomly divided into two experimental groups (n = 15): Group 1: MTA®, and Group 2: Biodentine®, in addition to positive and negative controls. Root treatment was performed with the MTWO rotary system, and obturation was carried out by means of the continuous wave thermoplastic system (Beefill) using Grossman-type cement as a sealant. Apical end apicoectomy was performed followed by the preparation of standardized retro-apical cavities and the respective fillings with MTA ® and Biodentine® according to the study group. Subsequently, the specimens were subjected to an apical filtration process of Chinese ink and transparency, while the apical filtration was evaluated with a stereoscopic microscope. The data were analyzed with the Mann-Whitney U test. Results: Inferential analysis showed that Biodentine® had less microleakage than MTA® with a statistically significant difference of 95% (p <0.034). Conclusion: Biodentine® cement showed greater apical sealing capacity than MTA® cement in retrograde fillings of single-root teeth ex vivo. (AU)
Subject(s)
Humans , Pit and Fissure Sealants , Retrograde Obturation , Silicate Cement , Calcarea SilicataABSTRACT
The aim of this study was to evaluate the effect of different commercial silanes on microshear bond strength of resin cement to lithium disilicate ceramic. Twenty ceramic samples with 10 mm in length, 10 mm wide and 3 mm in thickness were fabricated, etched with 10% hydrofluoric acid for 20 seconds, and divided into 5 groups, according to the commercial silane applied: G1- RelyX Ceramic Primer (3M ESPE), G2- Angelus Silane, G3- Prosil (FGM), G4- Dentsply Silane (Dentsply) and G5- Bis-Silane (Bisco). Silanes were applied in accordance to manufacturers' recommendations. Addition silicone molds with 1 mm in thickness, 10 mm in diameter and 3 perforations with 1 mm in diameter each one, were placed on ceramic and filled with the resin cement RelyX ARC (3M ESPE) in all groups. Light activation was performed with LED Bluephase G2 (Ivoclar Vivadent) at 1200 mW/cm2, for 30 seconds. Samples were maintained in 100% humidity at 37°C for 24 hours and submitted to microshear test. The data (MPa) were submitted to one-way ANOVA and Tukey test (α=0.05). The results obtained for each group were: G1: 22.39±2.99; G2: 23.35±4.08; G3: 26.05±5.46; G4: 18.56±4.09; G5: 25.26±4.10. Statistical analysis showed significantly lower microshear bond strength for G4. Fracture pattern analysis showed predominance of adhesive failures in G1 and G2. G3 and G5 presented higher percentage of cohesive failures in ceramic, and G4 showed mixed, adhesive and cohesive fractures with similar percentages. It was concluded that different silanes showed influence on the lithium disilicate ceramic resin cement bond strength
O objetivo neste estudo foi avaliar o efeito de diferentes silanos comerciais na resistência de união ao microcisalhamento do cimento resinoso à cerâmica de dissilicato de lítio. Foram confeccionadas 20 amostras de cerâmica (10mm de comprimento, 10mm de largura e 3mm de espessura), condicionadas com ácido fluorídrico a 10% por 20 segundos e divididas em 5 grupos, de acordo com o silano aplicado: G1- RelyX Ceramic Primer (3M ESPE), G2- Silano Angelus, G3-Prosil (FGM), G4- Silano Dentsply e G5-Bis-Silane (Bisco). Matrizes de silicone por adição (1 mm de espessura, 10 mm de diâmetro e 3 perfurações com 1 mm de diâmetro) foram colocadas sobre a cerâmica e preenchidas com cimento resinoso RelyX ARC (3M ESPE). A fotoativação foi realizada com LED Bluephase G2 (Ivoclar Vivadent) a 1200 mW/cm2, por 30 segundos. As amostras foram mantidas em 100% de umidade a 37°C por 24 horas e submetidas ao teste de microcisalhamento. Os dados (MPa) (G1: 22,39+2,99; G2: 23,35+4,08; G3: 26,05+5,46; G4: 18,56+ 4,09; G5: 25,26+4,10) foram submetidos a análise de variância e ao teste de Tukey (p<0,05). A análise estatística mostrou valor de resistência de união significantemente menor para G4. A análise do padrão de fratura mostrou predominância de falha adesiva para G1 e G2. G3 e G5 apresentaram maior porcentagem de falha coesiva em cerâmica, e o G4 apresentou fraturas mista, adesiva e coesiva em igual porcentagem. Concluiu-se que os diferentes silanos apresentaram influência na resistência de união do cimento resinoso à cerâmica de dissilicato de lítio
Subject(s)
Silanes , Ceramics , Dental Cements , Shear Strength , Lithium , Silicate Cement , Cementation , Resin Cements , Dental PorcelainABSTRACT
Objetivo: este estudo teve como objetivo comparar a resistência de união à dentina de um material à base de silicato de cálcio fotopolimerizável modificado por resina (TheraCal LC®; Bisco, Schaumburg, IL, EUA) com MTA branco (WMTA®; Angelus, Londrina, PR, Brasil). Materiais e Métodos: dezesseis incisivos superiores e caninos humanos foram selecionados e três discos de 1 mm foram obtidos a partir do terço médio de cada raiz. Na superfície coronal de cada disco, dois furos de 1,2 mm de largura foram perfurados na dentina. Em seguida, os buracos artificiais foram preenchidos com um dos materiais testados: WMTA® e TheraCal LC®. As fatias dentárias preenchidas foram armazenadas em uma solução salina tamponada com fosfato (PBS) (pH 7,2) por 7 dias a 37°C. Depois disso, a avaliação do push-out foi realizada com uma ponta do êmbolo de 1,0 mm. A carga foi aplicada a uma velocidade de 0,5 mm / min até o deslocamento do selador. Os resultados foram expressos em MPa. O teste U de Mann-Whitney foi aplicado para classificar os materiais quanto à resistência adesiva à dentina. O nível de significância foi estabelecido em = 5%. Resultados: todas as amostras apresentaram resultados de resistência de união à dentina mensuráveis e não ocorreram falhas prematuras. O TheraCal LC® demonstrou valores superiores de resistência de união à dentina quando comparado ao WMTA® (P<0,0001). Conclusões: existe uma vantagem do TheraCal LC® sobre o WMTA® no que diz respeito à resistência da união ao empurrar e, portanto, pode ser considerado um material reparador promissor e inovador
Objective: this study aimed to compare the dentin bond strength of a resin-modified light-curable calcium-silicate-based material (TheraCal LC®; Bisco, Schaumburg, IL, USA) with White MTA (WMTA®; Angelus, Londrina, PR, Brazil). Materials and Methods: sixteen human maxillary incisors and canines were selected and three 1-mm-discs were obtained from the middle third of each root. On the coronal surface of each disc, two 1.2-mm-wide-holes were drilled through the dentin. Then, artificial holes were filled with one of the tested materials: WMTA® and TheraCal LC®. The filled dental slices were stored in a phosphate-buffered saline (PBS) solution (pH 7.2) for 7 days at 37°C. After that, push-out assessment was performed with a 1.0-mm-plunger-tip. Load was applied at a crosshead speed of 0.5 mm/min until sealer displacement. The results were expressed in MPa. Mann-Whitney U test was applied to rank materials regarding dentin push-out bond strength. Significance level was set at a = 5%. Results: All specimens showed measurable results and no premature failure occurred. TheraCal LC® demonstrated superior push-out bond strength values to dentin when compared to WMTA® (P<0.0001). Conclusions: there is advantage of TheraCal LC® over WMTA® as regards to the push-out bond strength and, therefore it may be taken as a promising and innovative reparative material
Subject(s)
Root Canal Filling Materials , Root Canal Obturation , Root Canal Therapy , Silicate Cement , Dental Materials , Endodontics , Light-Curing of Dental AdhesivesABSTRACT
We report the surgical endodontic treatment of a maxillary first premolar with a lateral lesion that originated from an accessory canal. Although lesions originating from accessory canals frequently heal with simple conventional endodontic therapy, some lesions may need additional and different treatment. In the present case, conventional root canal retreatment led to incomplete healing with the need for further treatment (i.e., surgery). Surgical endodontic management with a fast-setting calcium silicate cement was performed on the accessory canal using a dental operating microscope. At the patient's 9-month recall visit, the lesion was resolved upon radiography.
Subject(s)
Bicuspid , Calcium , Dental Pulp Cavity , Radiography , Retreatment , Silicate Cement , SilicatesABSTRACT
Las propiedades mecánicas de los materiales, han hecho que la técnica de cementación de las carillas sea tan cambiante y tan estudiada. Esta técnica ha sido modifi cada basados en investigaciones de diversos estudios clínicos. Lo cambiante de la técnica, no solamente es para el substrato del órgano dental, sino también para el material de la cerámica elegida. Esto confunde al clínico al estar modifi cando los procedimientos de cementación. En años recientes, como resultado del rápido progreso en la tecnología CAD/CAM, existe una gran cantidad de nuevas cerámicas y materiales híbridos en el mercado odontológico, esto se refl eja en benefi cios para los pacientes, al poder seleccionar distintas clases de materiales restaurativos. A su vez, las indicaciones se han expandido, esto hace que se incremente la difi cultad para los clínicos y ceramistas para mantenerse actualizados en la selección del material, lo que es más importante en los protocolos correctos de adhesión para el tratamiento en distintas superfi cies. En este artículo, se presenta el reporte de un caso clínico a nueve meses de seguimiento con la fi nalidad de evaluar la efi cacia del nuevo acondicionador monocomponente, para grabar y silanizar en un solo paso para Disilicato de Litio (DL), el nuevo Monobond Etch & Prime (MBEP) en el mismo frasco contiene la cantidad sufi ciente de ácido acondicionador y silano. Esto simplifi ca los procedimientos de adhesión, reduciendo no sólo el número de pasos, sino también el tiempo de trabajo (AU)
The mechanical properties of the materials have made the technique of veneer cementation, so changing and so studied. This technique has been modifi ed due to several clinical studies; especially in investigations that have been carried out in this respect. The changes made in the cementation technique, have not been only for the substrate of the dental organ, but also for the chosen ceramic material. This confuses the clinician by modifying the cementing procedures. In recent years, as a result of the rapid progress in CAD/CAM technology, a large number of new ceramics and hybrid materials, have been introduced into the dental market. This is refl ected in benefi t to the patients, because we have more opportunities to off er diff erent kinds of restorative materials; and at the same time, their indications have expanded, but this, increases the diffi culty for clinicians and ceramists to stay up-to-date on material selection, and the most important in the correct adhesion protocols for the treatment of diff erent surfaces. This paper presents, a nine months clinical case report to evaluate the effi cacy of the new monocomponent conditioner, for etching and silanizing in a single step the Lithium Disilicate (LD), the new Monobond Etch & Prime (MBEP), contains in the same bottle suffi cient amount of conditioning acid and silane. This simplifi es the adhesion procedures by reducing, not only the number of steps but also the working time (AU)
Subject(s)
Humans , Male , Adult , Silanes , Acid Etching, Dental , Ceramics , Dentin-Bonding Agents , Phosphoric Acids , Silicate Cement , Surface Properties , Tooth Preparation , Dental Veneers , Esthetics, DentalABSTRACT
ABSTRACT: The aim of the study was to evaluate the chemical composition and radiopacity of new calcium-silicatebased cements. Discs of 10 mm x 1 ± 0.1mm were prepared of BiodentineTM, TheraCal, Dycal and GC Fuji IX (n=5). The samples were radiographed directly on an PSP occlusal plate adjacent to an aluminium step wedge. The radiopacity of each specimen was determined according to ISO 9917/2007. Statistical analyses were carried out using ANOVA and Tukey's test at a significance level of 5 %. The chemical constitution of materials was determined by scanning electron microscopy (SEM) and energy dispersive x-ray element mapping. The radiopacities of the materials in decreasing order were: GC Fuji IX (3.45 ± 0.16 mm), Dycal (3.18 ± 0.17), BiodentineTM (2.79 ± 0.22), and TheraCal (2.17 ± 0.17). TheraCal showed the lowest radiopacity compared to the other materials, followed by BiodentineTM. Dycal and GC Fuji IX radiopacity values did not present significant statistical differences. Scanning electron microscopy and energy dispersive X-ray analysis revealed the presence of zirconium in BiodentineTM; and strontium, barium and zirconium in TheraCal as radiopacifying elements. The new calcium silicate cements present distinctive chemical composition. BiodentineTM contains zirconium as a radiopacifying element and has higher radiopacity values than TheraCal, which contains barium and strontium as radiopacifiers.
RESUMEN: El objetivo de este estudio fue evaluar la composición química y la radiopacidad de nuevos cementos en base a silicato de calcio. Discos de 10 mm x 1 ± 0,1 mm fueron preparados con BiodentineTM, TheraCal, Dycal y GC Fuji IX (n=5). Las muestras fueron radiografiadas directamente en una película PSP oclusal adyacente a una cuña escalonada de aluminio. La radiopacidad de cada espécimen fue determinada de acuerdo a la norma ISO 9917/ 2007. Se realizaron los análisis estadísticos con las pruebas ANOVA y test de Tukey con un nivel de significancia de 5 %. La constitución química de los materiales fue determinada con microscopía electrónica de barrido y con mapeo por análisis con dispersión de energía de rayos X. La radiopacidad de los materiales en orden decreciente fue: GC Fuji IX (3,45 ± 0,16 mm), Dycal (3,18 ± 0,7 mm), BiodentineTM (2,79 ± 0,22 mm), y TheraCal (2,17 ± 0,17 mm). TheraCal mostró la menor radiopacidad comparada con los otros materiales, seguido de BiodentineTM. Los valores de radiopacidad de Dycal y GC Fuji IX no presentaron diferencias estadísticas significativas. Los análisis de microscopía electrónica de barrido y mapeo por análisis con dispersión de energía de rayos X revelaron la presencia de zirconio en BiodentineTM; y de estroncio, bario y zirconio en TheraCal, como elementos radiopacos. Los nuevos cementos en base a silicato de calcio presentan una composición química distintiva. BiodentineTM contienen zirconio como elemento que provee radiopacidad y tiene mayor valor de radiopacidad que TheraCal, el cual contiene bario y estroncio como agente radiopaco.
Subject(s)
Humans , Silicate Cement/chemistry , Dental Materials/classification , Dental Materials/chemistry , Silicate Cement/analysis , Radiography, Dental , Silicates/chemistry , Calcium Compounds/chemistry , Physical PhenomenaABSTRACT
Objetivo: El propósito del estudio fue comparar la resistencia a la fractura de dos materiales de reforzamiento radi- cular en dientes monorradiculares con tratamiento endodóntico. Metodología: Se incluyeron cuarenta y cinco premo- lares inferiores humanos recientemente extraídos, los cuales fueron divididos en tres grupos (n = 15). El grupo 1 estuvo conformado por dientes con tratamiento de conducto sin ningún tipo de refor- zamiento radicular, el grupo 2 estuvo formado por dientes con tratamiento de conducto y reforzados con un cemento a base de silicato de calcio (Biodenti- neTM), y el grupo 3 estuvo formado por dientes con tratamiento de conducto que fueron reforzados con un poste de fibra de vidrio. Se evaluó la resistencia a la fractura (kN) utilizando la máquina de ensayo universal, a una velocidad de 0,5 mm/min hasta que se produjo la fractura. Se utilizó la prueba de Anova de una vía para comparar la resistencia a la fractura entre los 3 grupos y la prueba de compa- raciones múltiples de Tukey. Resultados: Los valores de la media y desviación estándar de cada grupo fueron: grupo 1, gutapercha (GP) 1,01±0,19 KN; grupo 2, Biodentine (BD) 1,41±0,25 KN, y grupo 3, postes de fibra de vidrio (PFV) 1,27±0,16 KN. Conclusión: El BiodentineTM mostró mejores valores de resistencia a la frac- tura radicular en comparación con los postes de fibra de vidrio y la gutapercha. (AU)
Objective: The aim of this in vitro study was to evaluate the fracture resistance of two root reinforcement materials in mono-radicular teeth with endodontic treatment. Methods: Thirty freshly extracted human premolars were divided into three groups (n=10). The teeth in group 1 were endodontically treated without any root reinforcement and a resin restora-tion was placed in the coronal portion. In group 2 only the apical 5-mm portion of the root canal was filled with gutta-percha, and the remaining portion was filled with calcium silicate-based cement (BiodentineTM), which was used as root reinforcement material. In group 3 a fiber post was cemented as a root reinforce-ment material. f racture resistance (kn) was evaluated using a universal testing machine exerting a compression load at a velocity of 0.5 mm / min until frac-ture occurred. a one-way anova test and Tukey's post-hoc test were used to compare the mean root fracture resis-tance (kn). Results: The mean values and standard deviation of each group were as follows: group 1 gutta-percha (gp) 1.01 ± 0.19 Kn; group 2 biodentine (bd) 1.41 ± 0.25 Kn, and; group 3 fiber post (pfv) 1.27 ± 0.16 Kn. statistically significant differences were not confirmed between the Biodentine (BD) group and fiber post (PFV) group (p 0.179). Conclu-sion: BiodentineTM exhibited better root fracture resistance values compared to fiber post and gutta-percha. (AU)
Subject(s)
Humans , Root Canal Therapy , Silicate Cement , Tooth Fractures , Dental Materials , EndodonticsABSTRACT
Este trabalho envolve os resultados de três diferentes ensaios clínicos randomizados: (1) restaurações ART em cavidades oclusais utilizando Fuji IX (GC), Vitro Molar (Nova DFL) e Maxxion R (FGM); (2) restaurações ART oclusoproximais utilizando Ketac Molar (3M ESPE) e Vitro Molar (Nova DFL) e (3) Restaurações ART em cavidades oclusais e ocluso-proximais utilizando Glass Carbomer (GCP), Dyract (Dentsply) e Equia Fill (GC). O objetivo desta tese foi avaliar se a escolha do material tem influência na sobrevida de restaurações ART em molares decíduos. Um total de 835 crianças de 4 a 8 anos de idade (estudo 1: n=150; estudo 2: n=117; estudo 3: n=568) com lesões de cárie em dentina sem sinais de envolvimento pulpar foram selecionadas e tratadas em escolas públicas do município de Barueri-SP. Os pacientes foram randomizados de acordo com o grupo de material restaurador de cada estudo. Todos os tratamentos foram feitos seguindo os preceitos do ART e as recomendações dos fabricantes. As restaurações foram avaliadas por examinador independente, treinado e calibrado (estudo 1 e 2: até 24 meses e estudo 3: até 36 meses de acompanhamento). Para verificação da sobrevida das restaurações foi utilizada a análise de sobrevida de Kaplan-Meier e teste log-rank. Para avaliar a associação entre o desfecho e as variáveis características do paciente foi aplicado o teste de Regressão de Cox (IC=95%). No estudo 1, a sobrevida de restaurações oclusais em molares dentes decíduos é maior ao utilizar o material Fuji IX (72,7%) quando comparado aos materiais VitroMolar (46,5%) e Maxxion R (39,6%). Não houve diferenças entre os materiais Maxxion R e Vitro Molar. No estudo 2, monstrou-se que sobrevida de restaurações oclusoproximais é maior ao utilizar o material Ketac Molar (48,6%) quando comparado ao VitroMolar (25,4%). Já no estudo 3, o material Glass Carbomer (CAR) apresenta menor sobrevida quando comparado ao cimento de ionômero de vidro de alta viscosidade (CIV)- Equia Fill e ao compômero (COM)- Dyract, tanto em cavidades oclusais (CIV=83%; COM=78%; CAR=62,5%) quanto em ocluso-proximais oclusais (CIV=56,19%; COM=56,15%; CAR=36,33%). Nenhuma diferença é observada entre o compômero e o cimento de ionômero de vidro de alta viscosidade. Outros fatores como sexo, arcada, lado, experiência de 38 cárie, operador e volume da cavidade não influenciaram a sobrevida das restaurações (p>0,05). Dessa forma, conclui-se que a sobrevida das restaurações ART em molares decíduos é influenciada pela escolha do material restaurador. Os materiais que apresentaram melhores resultados nestes ensaios clínicos randomizados foram: Fuji IX (GC Corp), Ketac Molar (3M ESPE), Equia Fill (GC Corp) e Dyract (Dentsply). Registro no ClinicalTrials.gov: Capítulo 1: NCT02377297; Capítulo 2: NCT02267720; Capítulo 3: NCT02217098.
Subject(s)
Silicate Cement , Survival , Tooth, Deciduous , Randomized Controlled Trial , Dental Atraumatic Restorative TreatmentABSTRACT
Abstract The aim of this study was to evaluate stress distribution in an occlusal veneer according to the restorative material, restoration thickness, and cement layer thickness. A tridimensional model of a human maxillary first molar with an occlusal veneer preparation was constructed using a modeling software of finite element analysis. The model was replicated 9 times to evaluate the factors: restoration thickness (0.6, 1.2, and 1.8 mm) and cement layer thickness (100, 200, and 300 μm). Then, each model received different restorative materials (High Translucency Zirconia - [YZHT], Lithium Disilicate - [LD], Zirconia Reinforced Lithium Silicate - [ZLS], Feldspathic - [F], and Hybrid Ceramic - [HC]), totaling forty-five groups. An axial load (600 N) was applied on the occlusal face for static structural analysis. Solids were considered isotropic, homogeneous, and linearly elastic. Contacts were considered perfectly bonded. Fixation occurred in the dental root and a mechanical static structural analysis was performed. Descriptive statistical analysis and one-way ANOVA (α =10%) were performed for tensile stress peak values in the restoration and cement layer. The difference between groups was compared using the Tukey's test with 10% significance to match the percentage of the mesh convergence test. According to the results, the cement layer thickness did not influence stress distribution in the restoration (p ≥ 0.10). The thicker the restoration, the higher the tensile stress concentration in the restoration. The graphs showed higher stress concentration in the YZHT, followed by LD, F, ZLS, and HC. Also, the restorative material influenced stress concentration on the cement layer, which decreased according to the sequence HC>YZHT>ZLS>LD>F. HC stood out for causing the least stress concentration in the restoration. Cement layer thickness did not interfere in the mechanical performance of the restorations.