Calcium Phosphate Phase Transformation Produced by the Interaction of the Portland Cement Component of White Mineral Trioxide Aggregate with a Phosphate-containing Fluid

Tay, Franklin R.; Pashley, David H.; Rueggeberg, Frederick A.; Loushine, Robert J.; Weller, R. Norman

doi:10.1016/j.joen.2007.07.008

Cited by 269 publications

(298 citation statements)

References 31 publications

(27 reference statements)

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“…When immersed in different storage media such as distilled water 14) and phosphate-containing solutions (e.g. phosphate buffered saline <PBS>) [15][16][17][18] , surface precipitates of potential bioactivity were formed on MTA. The precipitation phenomenon was attributed to a possible interaction of the released calcium (Ca 2+ ) with the surrounding fluid environment.…”

Section: Introductionmentioning

confidence: 99%

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

2010

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The purpose of this study was to analyze the ultrastructures and chemical compositions of precipitates formed on mineral trioxide aggregate (MTA; White ProRoot MTA) immersed in distilled water (DW) or phosphate buffered saline (PBS), based on the attribution that MTA's bioactivity and sealing ability are influenced by its interaction with the external fluid environment. After 1 and 14 days of immersion, precipitates formed on MTA disks were analyzed using wavelength-dispersive X-ray spectroscopy electron probe microanalyzer with image observation function (SEM-EPMA; EPMA1601, Shimadzu, Kyoto, Japan), and Fourier transform-infrared (FT-IR) spectroscopy. On DW specimens, cubic-like crystals containing Ca, O, and C (17, 66, and 17 at% respectively) were produced. State analysis of calcium kβ spectrum also revealed calcium hydroxide. On PBS specimens, acicular-spherical and lath-like crystals with Ca/P molar ratios of 1.42 and 1.58 respectively were produced. In conclusion, the precipitates formed on DW specimens were identified as calcium carbonate and calcium hydroxide primarily, whereas the precipitates on PBS specimens were inferred to be amorphous calcium phosphate.

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Section: Introductionmentioning

confidence: 99%

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

2010

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Section: Discussionmentioning

confidence: 99%

“…21,22 This carbonated apatite represents the biological apatite phases that are found in bone, cement, and dentin. 22 In the present study, the use of different rewetting solutions simulated the conditions of dentin moisture. Under in vivo conditions, the root dentin of endodontically treated teeth has a moisture level of 12.1%, 23 and this moisture is perhaps insufficient to promote the bioactivity of materials within the root canal.…”

Section: Discussionmentioning

confidence: 99%

Effect of rewetting solutions on micropush-out dentin bond strength of new bioceramic endodontic material

et al. 2017

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To evaluate the influence of rewetting solutions on bond strength to root dentin of conventional gutta-percha (GP) or niobium phosphate glass-based gutta-percha (GNb) associated with a bioceramic sealer. The root canals of 80 human mandibular premolars were prepared using nickel-titanium instruments and irrigation with sodium hypochlorite and EDTA. The teeth were randomly divided into four groups according to the gutta-percha used: GNb or GP associated with EndoSequence BC Sealer (BC) and the solution for rewetting dentin before filling (distilled water; phosphate buffer saline solution -PBS; simulated body fluid -SBF; or no solution). The root canals were filled with a single cone using warm vertical condensation. Micropush-out bond strengths associated with the filling materials in slices from middle root thirds was determined 30 days after root filling. The failure mode was analyzed with stereoscopic lens. The data were statistically analyzed by two-way ANOVA and Holm-Sidak test (p < 0.05). There was significant difference in the types of gutta-percha (p < 0.001) and in the different rewetting solutions (p = 0.003). The interaction between gutta-percha and rewetting solutions was not significant (p = 0.53). The SBF solution provided an increase in bond strength for both gutta-percha solutions. The GNb+BC (3.42 MPa) association increased bond strength when compared with GP+BC (2.0 MPa). The use of SBF as a dentin rewetting solution increased bond strength in the groups studied. Association of GNb with bioceramic sealer was beneficial, increasing the bond strength to dentin when compared with the association with GP.

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“…Calcium hydroxide is also responsible for formation of a hard tissue barrier calcium hydroxide eventually also react with phosphate ion to form amorphous calcium phosphate which ultimately yields hydroxapatite. [10][11][12][13] As the MTA matures in phosphate of body fluids the calcium deficient hydroxapatite is formed at the surface of MTA [14] .…”

Section: Chemistrymentioning

confidence: 99%

Mineral Trioxide Aggregate (MTA) ‘A versatile Endodontic Material’

Kharat¹,

Khan²,

Singhai³

et al. 2014

J Cont Med A Dent

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Calcium Phosphate Phase Transformation Produced by the Interaction of the Portland Cement Component of White Mineral Trioxide Aggregate with a Phosphate-containing Fluid

Cited by 269 publications

References 31 publications

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

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

Effect of rewetting solutions on micropush-out dentin bond strength of new bioceramic endodontic material

Mineral Trioxide Aggregate (MTA) ‘A versatile Endodontic Material’

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