ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 61, (4) 367 - 371 (2017)

Otulakowska-Skrzynska J. 1, Czarnecka B. 2, Nicholson J. W. 4 , 3
1 Department of Prosthetic Dentistry, Poznan University of Medical Sciences, Poznan, Poland
2 Department of Biomaterials and Experimental Dentistry, Poznan University of Medical Sciences, Poznan, Poland
3 Dental Materials Unit, Queen Mary University of London, London UK
4 Bluefield Centre for Biomaterials, London, UK

Keywords: Glass-ionomer, Hydrogen sulphide, Effects

The effect of aqueous hydrogen sulfide on the properties of a conventional and a resin-modified glass-ionomer dental cement has been determined. Specimens were stored for 1 week in (i) H₂S/glycerol/water, (ii) glycerol/water and (iii) pure water. After this time, the mass changes were determined, the pH of the solution was measured and the ion-content was determined, the latter by ICP-OES. There were significant differences in the mass uptake, pH change and ion release of the cements. Both showed significant gains in mass in both water and water/glycerol. In H₂S /water/glycerol Ketac Cem (a conventional glass-ionomer) showed an insignificant mass loss, and Fuji Plus showed a minor significant gain. Both materials altered the pH of all storage solutions significantly. The pH of the H₂S /water/glycerol medium increased whereas the pH of both pure water and water/glycerol went down. The ion release into glycerol/water was different from release into water, with sodium release being suppressed. The H₂S medium showed almost no differences from glycerol/water, indicating that the H₂S component has almost no effect on these cements. This leads to the conclusion that these cements can safely be used sub-gingivally even in patients where oral malodour suggests that reasonable amounts of H₂S may be present.

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doi: 10.13168/cs.2017.0036
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