| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Damidot, Denis
IMT Nord Europe
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2024Application of various microscopy techniques to study early‐age and longer‐term behaviour of super sulphated cement microstructurecitations
- 2022Quantification of the Hardened Cement Paste Content in Fine Recycled Concrete Aggregates by Means of Salicylic Acid Dissolutioncitations
- 2020Optimization of the formulation of an original hydrogel-based bone cement using a mixture designcitations
- 2020Colour and chemical stability of bismuth oxide in dental materials with solutions used in routine clinical practicecitations
- 2018Use of uncontaminated marine sediments in mortar and concrete by partial substitution of cementcitations
- 2018Effect of saturation state of fine recycled concrete aggregates on the properties of mortars
- 2018Biodeterioration of mortars exposed to sewers in relation to microbial diversity of biofilms formed on the mortars surfacecitations
- 2018Impact of a thin coating layer of calcium aluminate and sulfoaluminate cements on algal biofouling
- 2018Biodeterioration of mortars in sewers: relation with microbial diversity of biofilms
- 2017On shrinkage and structure changes of pure and blended Portland concretescitations
- 2017FORMULATING AND OPTIMIZING THE RHEOLOGICAL PROPERTIES OF A COMPOSITE BONE CEMENT USING MIXTURE DESIGN
- 2016Development of treatment to prevent the algal biofouling
- 2015Effect of the Chemical Composition of Building Materials on Algal Biofouling
- 2015Valorisation of sediments in self-consolidating concrete: Mix-design and microstructurecitations
- 2014Influence of the chemical composition of mortars on algal biofouling
- 2010Improved evidence for the existence of an intermediate phase during hydration of tricalcium silicatecitations
Places of action
| Organizations | Location | People |
|---|
article
Colour and chemical stability of bismuth oxide in dental materials with solutions used in routine clinical practice
Abstract
<jats:p>Bismuth(III) oxide is included as a radio-opacifier in dental materials, including hydraulic silicate cements, the material of choice for several endodontic procedures. It has been implicated in tooth discoloration after contact with endodontic irrigants, in particular NaOCl solution, To date, there has been no work on the chemistry: all reports have been of clinical findings only. The purpose now was to report the reactions leading to colour change from Bi<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> in contact with solutions used in routine endodontic practice. Ten-gram portions of Bi<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> were immersed in either water, NaOH, NaCl, NaOCl or HCl solution, either in the dark or exposed to visible light, and samples retrieved at 1, 4, 12 and 24 weeks. After washing, these were exposed to either added CO<jats:sub>2</jats:sub> or not, for 1 week while drying, and under the same dark or light conditions. Changes in appearance were monitored by photography and colour measurement, and chemically by X-ray diffraction and Fourier-transform infrared spectroscopy. 24-week material was studied using electron paramagnetic resonance and Raman spectroscopy; NaOCl-treated material was also examined by scanning electron microscopy. With water, NaCl and NaOH, bismuth subcarbonate was formed. With or without added carbon dioxide, discoloration occurred from pale yellow to light brown when exposed to light, and to a lesser extent in the dark, intensifying with time. In contrast, exposure to NaOCl rapidly formed a dark brown-black sodium bismuthate. With HCl, white BiOCl was formed. Bi<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> is not at all inert in this context as is commonly believed, denying its principle of use. Previously unreported solution-mediated reaction occurs readily even in water and NaCl solution, forming new compounds that discolour. In contact with NaOCl sodium bismuthate is formed; severe darkening occurs rapidly. The reactivity is such that Bi<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> is not indicated for dental materials and should be withdrawn from use.</jats:p>