Effect of Ultrasonic Activation on pH and Calcium Released by Calcium Hydroxide Pastes in Simulated External Root Resorption

Duarte, Marco Antônio Húngaro; Balan, Nickolas V.; Zeferino, Márcia A.; Vivan, Rodrigo Ricci; Morais, Carlos Alberto Herrero de; Tanomaru-Filho, Mário; Ordinola‐Zapata, Ronald; Moraes, I G de

doi:10.1016/j.joen.2012.03.005

Cited by 31 publications

(47 citation statements)

References 24 publications

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“…In the present study, carriers other than distilled water increased the pH more at long term. These results were in contrast with study of Duarte et al that showed the type of carrier is not an important factor in creating an alkaline environment (24), but when calcium hydroxide is agitated by ultrasonic into the canal, the greatest change in pH in the external root surface is recorded due to the greater penetration of powder particles of calcium hydroxide into the canal (28). In the study of Javidi et al (29) Metapaste, Surpaste and Multical were compared for change of pH in the surrounding environment of root after 1, 24, 48 hour(s) and one week and it was concluded that Multical provided higher pH than Metapaste and Surpaste around the root surface.…”

Section: Discussioncontrasting

confidence: 84%

Evaluation of Hydroxyl Ion Diffusion in Dentin and Injectable Forms and a Simple Powder-Water Calcium Hydroxide Paste: An in Vitro Study

Eftekhar

Moghimipour

Eini

et al. 2014

Jundishapur J Nat Pharm Prod

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Background: Intra canal medicaments are used to reduce the number of bacteria and reinfection in endodontic procedures. Calcium Hydroxide was introduced to endodontics by Herman as an intracanal antimicrobial agent. Objectives: The aim of this study was to present an injectable formulation of calcium hydroxide then compare the final pH of this new formulation with Metapaste and evaluate the effect of a mixture of Calcium Hydroxide powder with water on human extracted teeth. Patients and Methods: A total of 49 extracted human single-canal roots without caries and visible microcracks were included in this study. The teeth were decoronated and length of teeth was measured 1 mm anatomic apex. The canals were prepared using step-back technique. A cavity was created in the middle third of the buccal surface of all roots. The teeth were randomly divided into five groups: Group A (n = 15): In this group the root canals were filled with a mixture of calcium hydroxide powder and distilled water. Group B (n = 15): Included roots that were filled with Metapaste. Group C (n = 15): Root canals of this group were filled with new formulation of calcium hydroxide paste. Group D (negative control, n = 2): Included roots that were filled with a mixture of calcium hydroxide powder and distilled water. Group E (positive control, n = 2): Root canals of this group were filled with a mixture of calcium hydroxide powder and distilled water. Each tooth was immersed in a separate closed container with 4 mL saline for 2 weeks, pH of liquids were measured with an electrical pH meter after 7 and 14 days. The SPSS software (version 13) was used for data analysis. Analysis of variance (ANOVA) and Tukey tests were used for the statistical evaluation of results. Results: There was no significant difference at 7th day between the groups (P = 0.17) but at 14th day, a significant difference was observed between the groups (P = 0.04). Conclusions:The new formulation of calcium hydroxide with methylcellulose base has slower ionic dissolution, more durability and longevity of alkaline properties in comparison to combination of powder with distilled water and is comparable with other commercial products.

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Section: Discussioncontrasting

confidence: 84%

Evaluation of Hydroxyl Ion Diffusion in Dentin and Injectable Forms and a Simple Powder-Water Calcium Hydroxide Paste: An in Vitro Study

Eftekhar

Moghimipour

Eini

et al. 2014

Jundishapur J Nat Pharm Prod

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show abstract

“…However, combining it with mechanical agitation with an ultrasonic device (Group 2) resulted in lower bacterial viability. This information, according to Duarte, et al 7 (2012), demonstrated that the ultrasonic agitation of CH pastes favored a higher pH level and calcium ion release in simulated external root resorptions. The hypothesis is that the results probably occurred because of the higher ionization that such an apparatus can provide or because of the higher penetration of the CH pastes into the dentinal tubules.…”

Section: Discussionmentioning

confidence: 84%

Effect of ultrasonic streaming on intra-dentinal disinfection and penetration of calcium hydroxide paste in endodontic treatment

et al. 2016

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Objective The antimicrobial effect of ultrasonic agitation of calcium hydroxide (CH) pastes in infected bovine dentin and their penetrability were evaluated using confocal laser scanning microscopy (CLSM) and microbiological culture.Material and Methods Fifty-two bovine teeth were infected with Enterococcus faecalis using a new contamination protocol; then they received CH paste and were divided into groups with or without ultrasound. Ultrasonic agitation was conducted for 1 min with a plain point insert. After 15 d, the CLSM analyzed the viable and dead bacteria with Live and Dead assay. The dentinal wall debris was collected by burs, and the colony forming units (CFU/mL) were counted. The penetrability of the paste inside dentinal tubules was tested using the B-rodamine dye.Results The calcium hydroxide paste showed better results with the use of ultrasonic agitation (p<0.05).Conclusion The ultrasonic agitation of CH paste increased its antimicrobial action and was responsible for intradentinal penetration with the fulfilment of the tubules.

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“…Não são encontrados muitos trabalhos na literatura sobre a agitação de medicação intracanal com uso de ultrassom, o que limita as inferências, mas é reconhecido que o hidróxido de cálcio, por ser uma substância que atua por elevação de pH e promoção de alterações proteicas, necrose superficial e eventos que resultam em morte bacteriana e melhora no processo de reparo, teve a sua ação potencializada devido ao impulsionamento da pasta promovido pela ação do ultrassom, corrobando com Duarte et al (2012), mostrando maior penetrabilidade.…”

Section: Dos Resultadosunclassified

“…Este resultado concorda com Duarte et al (2012) que demonstraram maior liberação de cálcio e elevado pH na porção externa da raiz, em reabsorções externas simuladas, quando a pasta de hidróxido de cálcio foi agitada com ultrassom. Esses resultados foram explicados pelos autores por uma provável intensificação da ionização promovida pela agitação ultrassônica, ou ainda em decorrência da maior penetração das partículas de hidróxido de cálcio nos túbulos dentinários com a agitação.…”

Section: Dos Resultadosunclassified

Tempo de ação antimicrobiana de pastas de hidróxido de cálcio associadas a agitação ultrassônica

Vasconcelos¹

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Effect of Ultrasonic Activation on pH and Calcium Released by Calcium Hydroxide Pastes in Simulated External Root Resorption

Cited by 31 publications

References 24 publications

Evaluation of Hydroxyl Ion Diffusion in Dentin and Injectable Forms and a Simple Powder-Water Calcium Hydroxide Paste: An in Vitro Study

Evaluation of Hydroxyl Ion Diffusion in Dentin and Injectable Forms and a Simple Powder-Water Calcium Hydroxide Paste: An in Vitro Study

Effect of ultrasonic streaming on intra-dentinal disinfection and penetration of calcium hydroxide paste in endodontic treatment

Tempo de ação antimicrobiana de pastas de hidróxido de cálcio associadas a agitação ultrassônica

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