Effect of pH on Sealing Ability of White Mineral Trioxide Aggregate as a Root-end Filling Material

Saghiri, Mohammad Ali; Lotfi, Mehrdad; Saghiri, Ali Mohammad; Vosoughhosseini, Sepideh; Fatemi, Ali; Shiezadeh, Vahab; Ranjkesh, Bahram

doi:10.1016/j.joen.2008.07.017

Cited by 83 publications

(85 citation statements)

References 26 publications

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“…Thus, it is hypothesized that MTA may be used to prevent or arrest tooth resorption. On the other hand, the effect of alkaline and acidic pH values on physical properties of WMTA has been well documented (18,19). However, the effect of bleaching agents on WMTA, when used as a protective barrier over the root canal filling, is disputed.…”

Section: Introductionmentioning

confidence: 99%

Microleakage comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier in nonvital bleaching

Vosoughhosseini

Lotfi²,

Shahmoradi³

et al. 2011

Med Oral

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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 barrier be used over the canal filling to prevent leakage of bleaching agents. Glass-ionomer (GI) is commonly used as a coronal barrier before nonvital bleaching. Because mineral trioxide aggregate (MTA) creates high alkalinity after 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 evaluate sealing 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 with gutta-percha without sealer. Gutta-percha was removed up to 3 mm below the cementoenamel junction (CEJ). The teeth 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 three bleaching agents was placed in the access cavity of each of the WMTA or GI groups. These three bleaching agents were 30% hydrogen peroxide, sodium perborate mixed with 30% hydrogen peroxide, and sodium perborate mixed with distilled water. The bleaching agents were replaced every 3 days for three times. In the positive controls, no Comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier e1018 coronal barrier was used. In the negative controls, all the tooth surfaces were covered by two layers of nail varnish. Microleakage was evaluated using protein leakage test. Statistical analyses were performed with the Kruskal-Wallis and Mann-Whitney tests.Results: The experimental groups showed minimum leakage which was not significantly more than tha in the negative controls. There was no statistically significant difference in leakage between the experimental groups (p<0.05).Conclusions: This study indicated that different bleaching agents have no effect on sealing ability of WMTA.

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Section: Introductionmentioning

confidence: 99%

Microleakage comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier in nonvital bleaching

Vosoughhosseini

Lotfi²,

Shahmoradi³

et al. 2011

Med Oral

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“…11,29,30 Moreover, some researchers have used phosphatecontaining solution as a storage medium before leakage studies to mimic an in vivo situation. [31][32][33] Parirokh et al showed that placing MTA in a PBS storage medium caused a significant decrease in coronal leakage. 34 They postulated that future in vitro studies should use PBS as a storage medium to simulate an in vivo condition.…”

Section: Discussionmentioning

confidence: 99%

Effect of Synthetic Tissue Fluid on Microleakage of Grey and White Mineral Trioxide Aggregate as Root-End Filling Materials : An in Vitro Study

Lotfi¹,

Vosoughhosseini²,

Saghiri³

et al. 2012

SQUMJ

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Objectives: The success of endodontic surgery has been shown to depend partly on the apical seal. Grey mineral trioxide aggregate (GMTA) produces hydroxyapatite twice as often as white mineral trioxide aggregate (WMTA) when suspended in a phosphate buffered saline (PBS) solution. The aim of this in vitro study was to compare the microleakage phenomenon of gray and white mineral trioxide aggregates as root-end filling materials after immersion in synthetic tissue fluid (STF). Methods: 55 single-rooted extracted maxillary anterior human teeth were divided into two experimental groups of 20 teeth each, plus 3 groups of 5 teeth each as two negative and one positive control groups. The root canals were cleaned, shaped, and laterally compacted with gutta-percha. The root ends were resected and 3 mm deep cavities were prepared. The root-end preparations were filled with GMTA or WMTA in the experimental groups. Leakage was determined using a dye penetration method. Data were analysed using analysis of variance (ANOVA) at the 0.05 level of significance. Results: The mean dye leakage was 0.40 ± 0.1 mm for GMTA and 0.50±0.1 mm for WMTA groups, respectively. There was no significant difference between the two experimental groups (P = 0.14). Conclusion: Despite the different properties and behaviours of GMTA and

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“…Estudios de biocompatibilidad con osteoblastos sugieren que puede promover la cicatrización a través de la estimulación del metabolismo óseo (6,7,(10)(11)(12).…”

Section: Methodsunclassified

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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Effect of pH on Sealing Ability of White Mineral Trioxide Aggregate as a Root-end Filling Material

Cited by 83 publications

References 26 publications

Microleakage comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier in nonvital bleaching

Microleakage comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier in nonvital bleaching

Effect of Synthetic Tissue Fluid on Microleakage of Grey and White Mineral Trioxide Aggregate as Root-End Filling Materials : An in Vitro Study

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

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