Evaluation of the propylene glycol association on some physical and chemical properties of mineral trioxide aggregate

Duarte, Marco Antônio Húngaro; Aguiar, K. Alves de; Zeferino, Márcia A.; Vivan, Rodrigo Ricci; Ordinola‐Zapata, Ronald; Tanomaru-Filho, Mário; Weckwerth, Paulo Henrique; Kuga, Milton Carlos

doi:10.1111/j.1365-2591.2012.02012.x

Cited by 56 publications

(76 citation statements)

References 26 publications

(56 reference statements)

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“…Atomic absorption spectrophotometry has been used successfully in earlier studies for analyzing calcium ions, 15,16 whereas the setting time evaluation using Gillmore needles is a standard test method that has been used previously to evaluate the setting time of MTA-based materials. 15,17 In the present study, W-MTA showed the highest pH values. It is well-established that MTA promotes an alkaline pH in a physiological solution.…”

Section: Discussionmentioning

confidence: 99%

Influence of 2% chlorhexidine on pH, calcium release and setting time of a resinous MTA-based root-end filling material

et al. 2015

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The addition of chlorhexidine (CHX) to a resinous experimental Mineral Trioxide Aggregate (E-MTA) based root-end filling material is an alternative to boost its antimicrobial activity. However, the influence of chlorhexidine on the properties of this material is unclear. The aim of this study was to evaluate the influence of 2% chlorhexidine on the pH, calcium ion release and setting time of a Bisphenol A Ethoxylate Dimethacrylate/Mineral Trioxide Aggregate (Bis-EMA/MTA) based dual-cure experimental root-end filling material (E-MTA), in comparison with E-MTA without the addition of CHX and with conventional white MTA (W-MTA). The materials were placed in polyethylene tubes, and immersed in deionized water to determine pH (digital pH meter) and calcium ion release (atomic absorption spectrometry technique). The setting time of each material was analyzed using Gilmore needles. The data were statistically analyzed at a significance level of 5%. E-MTA + CHX showed an alkaline pH in the 3 h period of evaluation, the alkalinity of which decreased but remained as such for 15 days. The pH of E-MTA + CHX was higher than the other two materials after 7 days, and lower after 30 days (p < 0.05). All of the materials were found to release calcium ions throughout the 30 days of the study. The addition of CHX increased the calcium ion release of E-MTA to levels statistically similar to W-MTA. E-MTA showed shorter initial and final setting time, compared with W-MTA (p < 0.05). The addition of 2% CHX to MTA prevented setting of the material. The addition of CHX to E-MTA increased its pH and calcium ion release. However, it also prevented setting of the material.

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Section: Discussionmentioning

confidence: 99%

Influence of 2% chlorhexidine on pH, calcium release and setting time of a resinous MTA-based root-end filling material

et al. 2015

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“…In a recent study, Duarte et al 22) found that the addition of PG, improved the flowability and the handling of MTA and they proposed 80% DW-20% PG as the optimum ratio. Also, in another study the same ratio was found to improve the push out bond strength of MTA 8) .…”

Section: Discussionmentioning

confidence: 99%

“…The lower fracture strength values obtained by the DW-PG group can be related to the moisture alteration in dentin tissue. It is well known that MTA requires water to initiate the hydration reaction and the setting process 22,31) . According to a recent study, the use of PG reduced the amount of water available for hydration and thus, the addition of PG increased the setting time of MTA 22) .…”

Section: Discussionmentioning

confidence: 99%

“…It is well known that MTA requires water to initiate the hydration reaction and the setting process 22,31) . According to a recent study, the use of PG reduced the amount of water available for hydration and thus, the addition of PG increased the setting time of MTA 22) . Therefore, the addition of PG to MTA may affect the water content of dentin negatively during the setting process, leading the tissues more susceptible to fracture.…”

Section: Discussionmentioning

confidence: 99%

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Interaction of backfilling techniques and MTA plugs with additives: Fracture strength and adaptation analyses

et al. 2017

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The aims were to evaluate the effects of different additives on the adaptation of mineral trioxide aggregate (MTA) plugs before and after different backfilling techniques and analyze the interference of filling procedures on the fracture resistance of simulated immature teeth. The apical parts of 60 teeth were filled with MTA mixed with distilled water (DW), propylene glycol (PG) or calcium chloride (CaCl2) and backfilled with cold lateral condensation (CLC) or warm vertical compaction (WVC). The specimens were subjected to adaptation analysis and fracture testing. CaCl2 addition resulted in poor marginal adaptation, while PG addition significantly decreased the fracture values (p<0.05). WVC technique negatively affected the marginal adaptation of MTA-CaCl2 plugs and decreased the fracture values of teeth with MTA-PG plugs (p<0.05). Mixing MTA with DW can be recommended as apical plug when the remaining root canal space is going to be filled with either CLC or WVC techniques.

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“…Propylene glycol associated with distilled water retarded MTA Angelus setting time, which corroborates the results of another study. 36 …”

Section: Discussionmentioning

confidence: 99%

Effects of various additives on antimicrobial, physical and chemical properties of mineral trioxide aggregate (MTA)

Andrade¹,

Alcalde²,

GUIMARÃƒES³

et al. 2015

Dental Press Endod

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Objective: To assess the antimicrobial activity, solubility, setting time, flowability, pH, calcium release and surface characteristic of mineral trioxide aggregate (MTA) associated with different substances: 1% sodium hypochlorite gel, 2% chlorhexidine gel, K-Y gel, distilled water associated with 10% propylene glycol (CCPG), saline solution, and distilled water alone. Methods: The antimicrobial test included Streptococcus mutans, Lactobacillus casei, Enterococcus faecalis and Candida albicans, and the direct contact method was used. To assess setting time and flowability, ASTM 266/08 and ADA 57/2007 specifications were used. To assess pH and calcium release, the different types of material were inserted into retrograde cavities of acrylic resin teeth and immersed in ultrapure water for reading at different periods. The latter was performed with a pHmeter and an atomic absorption spectrophotometer. To assess the surface characteristics, acrylic teeth were analyzed under scanning electron micrograph (SEM). Results: The results yielded by the antimicrobial activity test revealed that additives associated with MTA were more inhibitory than bactericidal, with chlorhexidine achieving the best results. The K-Y vehicle made the additive more soluble than others. There were statistical differences amongst groups (p > 0.05) for flowability. The greatest setting time was observed in the CCPG group. The K-Y group presented the lowest pH and calcium release values in the 3-hour period. In the other periods, there was greater uniformity amongst groups. As regards the surface characteristics analysis, the CCPG group presented the greatest porosity (p < 0.05). Conclusions:Only the chlorhexidine gel brought some improvement to the antimicrobial effect, K-Y gel interfered in the physical-chemical properties of MTA and the addition of CCPG provided the greatest porosity.Keywords: Antimicrobial sensitivity test. Calcium release. Solubility. pH level. Physical-chemical properties. MTA.

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Evaluation of the propylene glycol association on some physical and chemical properties of mineral trioxide aggregate

Abstract: The addition of PG to MTA-Angelus increased its setting time, improved flowability and increased the pH and calcium ion release during the initial post-mixing periods. The ratio of 80% DW–20% PG is recommended.

Cited by 56 publications

References 26 publications

Influence of 2% chlorhexidine on pH, calcium release and setting time of a resinous MTA-based root-end filling material

Influence of 2% chlorhexidine on pH, calcium release and setting time of a resinous MTA-based root-end filling material

Interaction of backfilling techniques and MTA plugs with additives: Fracture strength and adaptation analyses

Effects of various additives on antimicrobial, physical and chemical properties of mineral trioxide aggregate (MTA)

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