Morphological and chemical analysis of different precipitates on mineral trioxide aggregate immersed in different fluids

Han, Le; Okiji, Takashi; Okawa, Shinpei

doi:10.4012/dmj.2009-133

Cited by 60 publications

(66 citation statements)

References 26 publications

(57 reference statements)

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“…GuerreiroTanomaru et al 28) showed that Portland cement-based materials with the addition of different radiopacifiers (bismuth oxide, calcium tungstate, and zirconium oxide) presented antimicrobial activity and pH similar to pure PC. The alkaline pH of MTA may be important for the calcium carbonate formation, which could contribute to the sealing ability of MTA 30) . Coronal leakage after sealing with MTA was lower than dentin-adhesive materials and silicon-based sealer 31) .…”

Section: Discussionmentioning

confidence: 99%

Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

et al. 2014

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The aim of this study was to evaluate some properties of the calcium silicate materials Mineral Trioxide Aggregate (MTA) and Portland cement (PC) with microparticulated (micro) and nanoparticulated (nano) zirconium oxide (ZrO 2 ) or niobium oxide (Nb 2 O 5 ). The experimental materials: White PC (PC), MTA-Angelus ® (MTA), PC+ZrO 2 micro, PC+ZrO 2 nano, PC+Nb 2 O 5 micro and PC+Nb 2 O 5 nano were submitted to radiopacity and pH evaluations. Furthermore, the antimicrobial activity against different microorganisms was assessed by agar diffusion test. MTA presented higher radiopacity than other materials. However, all materials except PC presented higher radiopacity than recommended by ISO/ADA. MTA promoted higher pH values in all analyzed periods (p≤0.05). At the initial periods, PC and PC+ZrO 2 micro showed pH similar to MTA. All materials showed antimicrobial activity against the evaluated microorganisms. In conclusion, ZrO 2 and Nb 2 O 5 could be alternative radiopacifiers to be added to calcium silicate materials.

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Section: Discussionmentioning

confidence: 99%

Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

et al. 2014

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“…The solubility of the components of Portland cementbased endodontic restoratives impacts upon their sealing capacity, mechanical stability, antimicrobial properties, biocompatibility and bioactivity [18][19][20][21] . For example, soluble calcium and silicate species are acknowledged to stimulate bone tissue regeneration 18,19) .…”

Section: Discussionmentioning

confidence: 99%

“…For example, soluble calcium and silicate species are acknowledged to stimulate bone tissue regeneration 18,19) . The release of hydroxide ions is associated with antimicrobial activity and also the ability to induce bone mineralisation 11,20,21) . The reaction between released calcium ions and physiological carbonate ions forms insoluble calcite which precipitates in the cracks, pores, voids and margins of the cement and is conjectured to improve the sealing ability of the material 20) .…”

Section: Discussionmentioning

confidence: 99%

Hydration kinetics, ion-release and antimicrobial properties of white Portland cement blended with zirconium oxide nanoparticles

Coleman

2014

Dent. Mater. J.

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This study examines the impact of 20 wt% zirconium oxide nanoparticles on the early hydration kinetics of white Portland cement by isothermal conduction calorimetry and transmission electron microscopy. The findings confirm that the nano-ZrO2 particles do not directly participate in the chemical reactions during cement hydration; although, they do divert the normal hydration processes and accelerate the initial setting reactions. The rate of heat evolution and the extent of the exotherm associated with these reactions are reduced in the presence of nano-ZrO2. The incorporation of nano-ZrO2 into the cement also decreases the solubility of the silicate phases but does not compromise its capacity to release hydroxide ions. There was no observed difference in the antimicrobial activity of the nano-ZrO2-blended and unblended cement pastes against S. aureus and E. coli; however, a modest reduction in this property was noted against P. aeruginosa for the blended cement.

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“…Esto podría reducir el tiempo de la técnica aplicada y una mejor comodidad para el paciente. Por otro lado en cuanto al uso de las dos marcas comerciales de MTA, no hay evidencia suficiente para descartar alguno de los dos, por lo tanto se debe seguir realizando investigaciones que logren aclarar este problema (26)(27)(28).…”

Section: Discussionunclassified

Comparación in vitro de la microfiltración apical del MTA ProRoot y Angelus en dientes monorradiculares

Romero

Manotas

Caballero³

2012

Av Odontoestomatol

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RESUMENAntecedentes: Uno de los retos en endodoncia es la obturación de los conductos con ápices abiertos permitiendo su sellado, evitando la microfiltración y la salida del material obturador hacia los tejidos periapicales, por esta razón actualmente se utilizan materiales como el Mineral Trióxido Agregado (MTA) para proporcionar un tope apical que garantice el sellado del conducto radicular evitando la contaminación bacteriana. Objetivos: Comparar la microfiltración apical in vitro del MTA de dos casas comerciales con y sin hidróxido de calcio en dientes monorradiculares con ápices amplios. Materiales y métodos: Para este estudio se utilizaron 80 dientes humanos monorradiculares extraídos, divididos en 4 grupos, MTA "Proroot" con y sin hidróxido de calcio y MTA "Angelus" con y sin hidróxido de calcio, sumergidos en una sustancia buffer simulando el periápice y posteriormente se realizó coloración con tinta china y evaluación de la microfiltración por medio del proceso de diafanación. Resultados: En el estudio todos los grupos presentaron algún grado de microfiltración, siendo los de mayor frecuencia los dientes obturados con MTA Angelus sin hidróxido de calcio y el que menos presentó fueron los obturados con MTA Proroot sin hidróxido de calcio. Conclusiones: Tanto el MTA Angelus como el MTA Proroot se pueden usar como barrera apical sin necesidad de usar hidróxido calcio, sin embargo es necesario afinar las técnicas y procedimientos en futuros estudios que permitan la toma de decisiones clínicas.Palabras clave: Mineral trióxido agregado, filtración, hidróxido de calcio. (MeSH Database). SUMMARY Background:One of the challenges in endodontics is root canal filling with open and wide apex, which allowing it to seal, preventing microleakage and the output of the filling material into periapical tissues, therefore currently used materials such as Mineral trioxide aggregate (MTA) to provide an apical stop to ensure the sealing of the root canal to avoid bacterial contamination. Objectives: To compare the in vitro apical microleakage of MTA in two trading houses with and without calcium hydroxide in teeth with apical single-rooted wide.

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Morphological and chemical analysis of different precipitates on mineral trioxide aggregate immersed in different fluids

Cited by 60 publications

References 26 publications

Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

Hydration kinetics, ion-release and antimicrobial properties of white Portland cement blended with zirconium oxide nanoparticles

Comparación in vitro de la microfiltración apical del MTA ProRoot y Angelus en dientes monorradiculares

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