Difference in contact angle values among calcium silicate and calcium aluminate dental cements

1. Nemanja Vuković, Department of Oral surgery, Faculty of Stomatology, Pančevo, Serbia
2. Djorđe Antonijević, Department of histology, Faculty of Dentistry, University of Belgrade, Serbia
3. Vladimir Biočanin, Stomatoloski fakultet, Pančevo, Serbia
4. Dragan Ilić, Department of Endodontics, Faculty of Dentistry, University of Belgrade, Serbia
5. Milica Gajić, Department of Pedodontics, Faculty of Stomatology, Pančevo, Serbia
6. Vukoman Jokanović , Laboratory for atomic Physics, Institute for nuclear science “Vinca”, University of Belgrade, Serbia

Nemanja Vuković1, Djorđe Antonijević 2,3,4 ,Vladimir Biočanin1,8, Dragan Ilić5, Milica Gajić6, Vukoman Jokanović 7
¹Department of Oral surgery, Faculty of Stomatology, Pančevo, Serbia
2 Department of histology, Faculty of Dentistry, University of Belgrade, Serbia
3 Laboratory for anthropology, Faculty of Medicine, University of Belgrade, Serbia
4Laboratory for atomic Physics, Institute for nuclear science “Vinca”, University of Belgrade, Serbia
5 Department of Endodontics, Faculty of Dentistry, University of Belgrade, Serbia
6 Department of Pedodontics, Faculty of Stomatology, Pančevo, Serbia
7 Laboratory for atomic Physics, Institute for nuclear science “Vinca”, University of Belgrade, Serbia
8Department of Oral surgery, Faculty of Pharmacy and Health, University of Travnik, Bosnia and Herzegovina


Introduction
Liquid tends to spread on a solid surface of the material. The contact angle presents the inverse relationship with wettability (surface free energy); the lower contact angle, better wettability. Different liquids may be used for contact angle measurement.
Aim
The aim of this study was to compare contact angles among different calcium silicate and calcium aluminate dental cements, obtained with glycerol, citrated human blood and diiodmethane.
Materials and methods
We used four groups of different calcium silicate and calcium aluminate cement discs (MTA, Portland, calcium aluminate + strontium fluoride and calcium aluminate + strontium carbonate). One sessile drop (2μL) of tested liquid (glycerol, citrated human blood and diiodmethane) was gently put on the surface of the investigated specimens and photographed with microscope camera. All images were analysed with computer programe Image J with Contact angle analyser.
Results
The calcium aluminate + strontium fluoride showed statistically lower contact angle compared to MTA and Portland using citrated blood drop (p<0.05). Likewise, calcium aluminate + strontium carbonate revealed significantly lower contact angle compared to MTA and Portland cement. (p<0.05).
On the other hand, using glycerol drop, significantly higher contact angles were recorded among calcium aluminate + strontium fluoride and both MTA and Portland (p<0.05).
Eventually, diiodmethane drop showed no statistical difference in contact angle values among the materials.
Discussion
Wettability could be indirectly connected to surface roughness of the material. Our results showed significantly better wettability with calcium aluminate cements compared to calcium silicate based cements (MTA, Portland). These results indicate that calcium aluminate cements could possess smoother surface and lower surface free energy than MTA and Portland.

Кључне речи: calcium silicate; calcium aluminate; dental cement; MTA; Portland

Тематска област: СИМПОЗИЈУМ Б - Биоматеријали и наномедицина

Датум: 29.07.2019.

Contemporary Materials 2019 - Savremeni Materijali

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