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Analysis of dentistry cements using FTIR Spectroscopy

Lada Agata

Science, Technology and Innovation

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2020

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Vol. 11, no. 4

33--39

EN

The aim of this study was to evaluate the influence of artificial saliva on dental materials. Dental cements of various compositions and applications were analyzed. Five types of cements were selected for the study: ionomer glass, carboxylic glass and cements used for temporary fillings: zinc-sulphate cement and cement containing calcium hydroxide. Dental materials were prepared in accordance with the manufacturer's instructions. In the first stage, the cements were examined using the transmission technique in the range of 400-4000 cm-1. Dental cements were incubated in saliva at pH 5 for 21 days. After this time, the FTIR spectra for the cements were measured again and placed in artificial saliva. It was found that the FTIR spectra of dentistry cements after contact with artificial saliva differ from those corresponding to the starting materials. Spectroscopic analysis was also performed on saliva before and after incubating dental cements and materials used as temporary fillings. FTIR results indicate that under these conditions changes occur on the surface of dental materials due to their incubation in artificial saliva. The composition of saliva changes after the incubation of dental materials in it. Urea present in artificial saliva is degraded. Carbonates and phosphates are formed on the surface of dental materials. The disappearance of some bands in the spectra of the cements and their appearance in the spectra of the artificial saliva indicates the transfer of some components from the cements to the artificial saliva. The environment of the artificial saliva affects the dental materials. Analogous changes in the spectra of all tested dental materials are observed. These changes are limited to their area.

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Klasa przygotowania powierzchni prętów Ti6Al4V na jakość połączenia z ZrO2 w ocenie badań mikroskopowych

Wita K., Czakon K., Hajduga M.

Aktualne Problemy Biomechaniki

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2015

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z. 9

123--128

PL

Celem pracy była ocena wpływu kondycjonowania piaskiem Al2O3 o gradacji: 50μm, 110μm, 250μm, powierzchni prętów Ti6Al4V na klasę połączenia z ZrO2 cementem dentystycznym RelyX 3M ESPE. Wnioski zostały formułowane na podstawie wyników badań topografii powierzchni 3D oraz oceny struktur metalograficznych.

EN

The aim of the research was the impact assessment conditioning sand Al2O3 grit: 50μm, 110μm, 250μm, area bars Ti6Al4V on the class connection with ZrO2 dental cement RelyX 3M ESPE. Proposals where formulated based on research results of 3D surface topography and evaluating the structures metallographic.

3

Badania nad syntezą stomatologicznych cermetów szkło-jonomerowych zarabianych wodą.

Karaś J., Ciołek L., Michałowski S.

Szkło i Ceramika

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2004

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R. 55, nr 5

28-32

EN

Glass-ionomer cements are currently used for various dental applications including lutting, liners, basses and direct restorations. Adhesive property to the tooth, less toxic effects to dental pulp, as well as their continuous release of fluoride are the main advantages of glass ionomer cements. They consist of the sodium calcium aluminosilicate glass powder and an aqueous solution of a polyalkenoic acid. The single compounds react as soon as they are mixed together. The aim of the investigation conducted in the Institute of Glass and Ceramics was to prepare water activated glass ionomer cements for restoration of the teeth. An aluminosilicate glasses, in which calcium has been substituted by strontium and barium, were prepared by melting. Steel quenched pieces of glass and water-cooled granular frit were produced. Glass were ground and sleved to prepare <45 micrometer powder. Particle size analysis of glass powder was made by using the laser analyzer. The polyacid powder was obtained by freeze drying of aqueous solution of polymer and grinding. Then the polymer was added as dry powder to the glass and the reaction of setting was initiated by addition of water. Specimens of water-activated glass ionomer cements prepared from various glasses and acrylic polyacid have been tested for setting time and compressive strength. It was concluded that the obtained glasses could be used to produce water-activated glass ionomer cements for use in dentistry.