Navigation Links
Nanocrystals make dentures shine
Date:1/5/2012

Jena (Germany) The hardest substance in the human body is moved by its strongest muscles: When we heartily bite into an apple or a schnitzel, enormous strengths are working on the surface of our teeth. "What the natural tooth enamel has to endure also goes for dentures, inlays or bridges", glass chemist Prof. Dr. Dr. Christian Rssel of the Friedrich Schiller University Jena (Germany) says. After all, these are worn as much as healthy teeth. Ceramic materials used so far are not very suitable for bridges, as their strengths are mostly not high enough. Now Prof. Rssel and his colleagues of the Otto-Schott-Institute for Glass Chemistry succeeded in producing a new kind of glass ceramic with a nanocrystalline structure, which seems to be well suited to be used in dentistry due to their high strength and its optical characteristics. The glass chemists of Jena University recently published their research results in the online-edition of the science magazine Journal of Biomedical Materials Research (doi: 10.1002/jbm.b.31972).

Glass-ceramics on the basis of magnesium-, aluminium-, and silicon oxide are distinguished by their enormous strength. "We achieve a strength five times higher than with comparable denture ceramics available today", Prof. Rssel explains. The Jena glass chemists have been working for a while on high density ceramics, but so far only for utilisation in other fields, for instance as the basis of new efficient computer hard drives. "In combination with new optical characteristics an additional field of application is opening up for these materials in dentistry", Prof. Rssel is convinced.

Materials, to be considered as dentures are not supposed to be optically different from natural teeth. At the same time not only the right colour shade is important. "The enamel is partly translucent, which the ceramic is also supposed to be", Prof. Rssel says.

To achieve these characteristics, the glass-ceramics are produced according to an exactly specified temperature scheme: First of all the basic materials are melted at about 1.500 C, then cooled down and finely cut up. Then the glass is melted again and cooled down again. Finally, nanocrystals are generated by controlled heating to about 1,000 C. "This procedure determines the crystallisation crucial for the strength of the product", the glass chemist Rssel explains. But this was a technical tightrope walk. Because a too strongly crystallised material disperses the light, becomes opaque and looks like plaster. The secret of the Jena glass ceramic lies in its consistence of nanocrystals. The size of these is at most 100 nanometers in general. "They are too small to strongly disperse light and therefore the ceramic looks translucent, like a natural tooth", Prof. Rssel says.

A lot of developing work is necessary until the materials from the Jena Otto-Schott-Institute will be able to be used as dentures. But the groundwork is done. Prof. Rssel is sure of it.


'/>"/>
Contact: Ute Schoenfelder
presse@uni-jena.de
Friedrich-Schiller-Universitaet Jena
Source:Eurekalert  

Related biology technology :

1. On the road to plasmonics with silver polyhedral nanocrystals
2. Nanocrystal doping developed by Hebrew University researchers enhances semiconductor nanocrystals
3. TU Delft identifies huge potential of nanocrystals in fuel cells
4. Breakthrough in nanocrystals growth
5. Strain on nanocrystals could yield colossal results
6. New imaging technique reveals the atomic structure of nanocrystals
7. Sheffield scientists shine a light on the detection of bacterial infection
8. Sheffield scientists shine a light on the detection of bacterial infection
9. Oscar Madison approach to solar cells may outshine Felix Unger design
10. Putting sunshine in the tank
11. Diamonds shine in quantum networks
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Nanocrystals make dentures shine
(Date:7/20/2017)... ... ... Dr. Asher Kimchi, Founder and Chairman of the International Academy of ... 22nd World Congress on Heart Disease held in Vancouver, BC, Canada. In addition to ... Awards. , Dr. Asher Kimchi, together with Co-Chairmen Dr. John A. Elefteriades and Dr. ...
(Date:7/20/2017)... , ... July 20, 2017 , ... Corporate Directors Forum ... its 27th annual Director of the Year Awards. , The awards will be presented ... This annual event celebrates directors who have made significantly positive contributions in the ...
(Date:7/18/2017)... ... 18, 2017 , ... G-CON today announced that it has ... its Patent Applications 14/858,857 and 13/669,785 both entitled Modular, Self-Contained, Mobile Clean Room. ... the protection of G-CON’s R&D investments and validate the G-CON platform as a ...
(Date:7/17/2017)... ... ... The Academy of Model Aeronautics (AMA) will host Aviation Adventure Day on ... from 9 a.m. to 2 p.m. at the International Aeromodeling Center in Muncie, Indiana. ... Day will be packed with entertaining activities for the entire family. Attendees will learn ...
Breaking Biology Technology:
(Date:6/23/2017)... ARMONK, N.Y. and ITHACA, N.Y. ... IBM ) and Cornell University, a leader in dairy ... combined with bioinformatics designed to help reduce the chances ... breaches. With the onset of this dairy project, Cornell ... the Consortium for Sequencing the Food Supply Chain, a ...
(Date:5/23/2017)... Italy , May 23, 2017  Hunova, the first robotic gym ... trunk, has been officially launched in Genoa, Italy . ... Europe and the USA . The technology ... on the market by the IIT spin-off Movendo Technology thanks to a ... the Multimedia News Release, please click: ...
(Date:5/16/2017)...   Bridge Patient Portal , an enterprise ... EMR Systems , an electronic medical record solutions ... established a partnership to build an interface between ... Centricity™ products, including Centricity Practice Solution (CPS), Centricity ... new integrations will allow healthcare delivery networks using ...
Breaking Biology News(10 mins):