Nanomodification of mineral trioxide aggregate for enhanced physiochemical properties

Saghiri, Mohammad Ali; Asgar, Kamal; Lotfi, Mehrdad; Garcı́a-Godoy, Franklin

doi:10.1111/j.1365-2591.2012.02056.x

Cited by 63 publications

(90 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This difference can be related to higher surface area of the group containing surface area because it leads to faster reaction of the powder with the liquid. The results of the present study are in line with the study of Saghiri et al 43 , with the difference that a different element has been used in that study to produce nano white MTA. The WJD lowest time setting was related to group P, which is in line with what was said about setting reaction because P material has alumina, but lacks gypsum.…”

Section: Discussionsupporting

confidence: 82%

Comparison of Compressive Strength and Setting Time of Four Experimental Nanohybrid Mineral Trioxide Aggregates and Angelus Mineral Trioxide Aggregate

Rahbar¹,

Tabari²,

Safyari³

et al. 2017

World Journal of Dentistry

View full text Add to dashboard Cite

Aim: The present study was carried out with the objective of comparing the compressive strength and setting time of four experimental nanohybrid mineral trioxide aggregates (MTAs) and angelus MTA. Materials and methods:In this research, four experimental formulations of nanohybrid MTA (groups are with the base of Portland cement, containing nanoparticles of zirconia, aluminum oxide, titanium, nanosilica, and gypsum and bismuth trioxide) and angelus MTA were compared. Powder and water were mixed with the ratio determined by a factory for angelus MTA and were mixed at a ratio of 3:1 in experimental samples until the consistency of putty was reached. These were then placed in stainless steel cylinder generators, with a diameter of 4 mm and a height of 6 mm, for testing compressive strength, and in generators with a diameter of 10 mm and height of 2 mm to test setting time. The samples prepared were tested after 24 hours and a month using a strength-testing machine. A 135 G needle was used to test the initial setting time in the prepared samples, and a 456.5 G needle was used to test the final setting time. In the end, data were analyzed using Statistical Package for the Social Sciences (SPSS) software.Results: Experimental nanohybrid MTA P significantly showed the minimum setting time and experimental nanohybrid MTA Q showed the maximum setting time in 30 days (p < 0.05). Angelus MTA had greater compressive strength than the experimental materials in 24 hours. Clinical significance: Considering that experimental MTAs showed less setting time compared with the commercial type, experimental MTAs can be deployed in clinical usage. Conclusion

show abstract

Section: Discussionsupporting

confidence: 82%

Comparison of Compressive Strength and Setting Time of Four Experimental Nanohybrid Mineral Trioxide Aggregates and Angelus Mineral Trioxide Aggregate

Rahbar¹,

Tabari²,

Safyari³

et al. 2017

World Journal of Dentistry

View full text Add to dashboard Cite

show abstract

“…It was already demonstrated that a MTA-based material composed by small particles shows reduced setting time and increased microhardness 18) . When added to PC, ZrO2 nanoparticles change the microstructure of the material during the hydration reaction, improving cellular proliferation and adhesion 19) .…”

Section: Introductionmentioning

confidence: 99%

“…It has been suggested that the use of nanoparticles could improve the physicochemical properties of MTA 18) . It was already demonstrated that a MTA-based material composed by small particles shows reduced setting time and increased microhardness 18) .…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2014

View full text Add to dashboard Cite

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.

show abstract

“…A variety of factors such as surrounding pH [ 101 , 120 ], material thickness [ 112 ], mixing techniques [ 122 ], condensing pressure [ 121 ], powder particle size [ 146 ], etching [ 96 ], blood and serum contamination [ 123 ], and temperature [ 151 ] can affect MTA…”

Section: Microhardnessmentioning

confidence: 99%

Properties of Hydrated Mineral Trioxide Aggregate

Tanomaru-Filho

Guerreiro-Tanomaru

2014

Mineral Trioxide Aggregate in Dentistry

View full text Add to dashboard Cite

MTA has been currently commercialized in two different forms, the gray (GMTA) and the white version (WMTA). In particular, the white MTA was developed due to the potential discoloration promoted by the gray version of the cement. The chemical composition of the MTAs is very similar to that of Portland cement despite the addition of components containing bismuth in the MTA's cements [ 91 , 128 ], which aims to confer radiopacity to the materials [ 34 ]. The mixture of the MTA powder with distilled water results in the formation of by-products, such as calcium hydroxide and calcium silicate hydrate gel [ 27 , 28 ] as discussed in Chap. 2 . The particular mechanism of hydration and the structure of the set material result in particular properties displayed by the set MTA.The initial pH of the MTA is approximately 10.2, but it increases to 12.5 after 3 h immersed in solution [ 177 ]. MTA has the ability to sustain high values of pH during long periods [ 75 ]. The high pH values exhibited by MTA are attributed to the constant release of calcium and the formation of calcium hydroxide.Several studies had reported release of calcium from MTA [ 12 , 74 , 131 ]. The calcium ion release is enhanced when calcium chloride is added as an accelerator to MTA [ 12 ]. Moreover, when MTA was placed into the root canals of teeth with simulated radicular resorption, a greater calcium ion release was detected in comparison to teeth not fi lled with MTA [ 131 ]. Setting TimeThe hydration of the MTA powder produces a colloidal gel, which solidifi es and results in a solid structure. MTA is prepared by mixing the powder with distilled water using a ratio of 3:1 (powder/distilled water) [ 184 ].

show abstract

Nanomodification of mineral trioxide aggregate for enhanced physiochemical properties

Abstract: Increasing surface area of powder can reduce setting time and increase microhardness even at lower pH values after hydration.

Cited by 63 publications

References 33 publications

Comparison of Compressive Strength and Setting Time of Four Experimental Nanohybrid Mineral Trioxide Aggregates and Angelus Mineral Trioxide Aggregate

Comparison of Compressive Strength and Setting Time of Four Experimental Nanohybrid Mineral Trioxide Aggregates and Angelus Mineral Trioxide Aggregate

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

Properties of Hydrated Mineral Trioxide Aggregate

Contact Info

Product

Resources

About