Journal ArticleDOI
Mechanism for Erosion of Glass-ionomer Cements in an Acidic Buffer Solution
TLDR
It was concluded that the dissolution was controlled by the diffusion of those species in the cement matrix, which was influenced by the structure of the matrix and the concentration of H+ ion at the cement surface.Abstract:
In order to clarify the mechanism for erosion of glass-ionomer cements, we immersed two commercial luting cements in an acidic buffer solution under various conditions. The amounts of F, Al, Si, and Ca eluted from the cement were (1) in proportion to the square root of immersion time, (2) unrelated to shape or volume of the sample, (3) dependent on its surface area, and (4) not affected by shaking of the solution. It was concluded that the dissolution was controlled by the diffusion of those species in the cement matrix, which was influenced by the structure of the matrix and the concentration of H+ ion at the cement surface. The unreacted glass particles near the cement surface were dissolved by the long immersion, and many pores were left in the surface region.read more
Citations
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Journal ArticleDOI
Compressive strength, fluoride release and recharge of fluoride-releasing materials.
Xiaoming Xu,John O. Burgess +1 more
TL;DR: The compressive strength, fluoride releases and recharge profiles of 15 commercial fluoride-releasing restorative materials have been studied and the clinic applications of different fluoride-Releasing materials have also been discussed.
Journal ArticleDOI
Solubility of root-canal sealers in water and artificial saliva.
Edgar Schäfer,T. Zandbiglari +1 more
TL;DR: Under the conditions of the present study, AH Plus showed the least weight loss of all sealers tested, independent of the solubility medium used, while Sealapex, Aptal-Harz and Ketac Endo had a marked weight loss in all liquids.
Journal ArticleDOI
Release of fluoride and other elements from light-cured glass ionomers in neutral and acidic conditions
TL;DR: Light-cured materials are as equally susceptible to erosion as are chemically cured glass ionomers, and during the immersion, some of the light-c cured materials showed a considerable weight gain.
Journal ArticleDOI
Fluoride release profiles of restorative glass ionomer formulations.
TL;DR: The Multivariate Data Analysis reveals that eight of the ten glass ionomers can be classified into four distinct groups, and it becomes apparent that different formulations can result in the same fluoride release profiles.
Journal ArticleDOI
Fluoride released from glass-ionomer cement is responsible to inhibit the acid production of caries-related oral streptococci
Kazuko Nakajo,Satoshi Imazato,Yusuke Takahashi,Wakako Kiba,Shigeyuki Ebisu,Nobuhiro Takahashi +5 more
TL;DR: Results indicate that the G IC eluate inhibits the acid production of caries-related oral streptococci at acidic pH and that the effect is due to fluoride derived from the GIC, establishing a cariostatic environment.
References
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Book
The mathematics of diffusion
TL;DR: Though it incorporates much new material, this new edition preserves the general character of the book in providing a collection of solutions of the equations of diffusion and describing how these solutions may be obtained.
Journal ArticleDOI
Reactions in Glass Ionomer Cements I. Decomposition of the Powder
Stephen Crisp,Alan D. Wilson +1 more
TL;DR: The initial stages of the reaction between the glass ionomer cement powder and polyacrylic acid solutions (aluminosilicate polyacrylate cement) are described and the amount of fluoride extracted is described.
Journal ArticleDOI
Reactions in glass ionomer cements: II. An infrared spectroscopic study.
TL;DR: The transmission and attentuated total reflectance spectra of a dental cement formed from an aluminosilicate glass and aqueous polyacrylic acid are reported and Interpretation of spectra show that a siliceous hydrogel is formed together with the polyacrylate salts of calcium and aluminum.
Journal ArticleDOI
The release of fluoride and other chemical species from a glass-ionomer cement.
TL;DR: The elution of fluoride, sodium and silica from a glass-ionomer cement was studied and it was found that these species were still being released when the experiments were concluded, however, the rate of release was much diminished.
Journal ArticleDOI
Reactions in Glass Ionomer Cements: III. The Precipitation Reaction:
Stephen Crisp,Alan D. Wilson +1 more
TL;DR: Water-soluble ions in dental cements of different ages were studied and electrical conductance measurements were made on cements up to three months after formation.