Projects / Programmes source: ARIS

Research of dental ceramics

Research activity

Code Science Field Subfield
2.04.01  Engineering sciences and technologies  Materials science and technology  Inorganic nonmetallic materials 

Code Science Field
T153  Technological sciences  Ceramic materials and powders 

Code Science Field
2.05  Engineering and Technology  Materials engineering 
dental cearmics, tetragonal zirconia (Y-ZTP), ageing, adhesion, clinical trials
Evaluation (rules)
source: COBISS
Researchers (15)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  33854  PhD Jasna Cotič  Stomatology  Researcher  2011 - 2014  28 
2.  17165  PhD Aleš Dakskobler  Materials science and technology  Researcher  2011 - 2014  153 
3.  17286  Darko Eterović    Technical associate  2011 - 2014 
4.  26323  Matjaž Golobič  Stomatology  Researcher  2011  10 
5.  13229  PhD Peter Jevnikar  Stomatology  Researcher  2011 - 2014  175 
6.  26457  PhD Andraž Kocjan  Materials science and technology  Researcher  2011 - 2014  319 
7.  33733  Sebastian Korošec  Stomatology  Researcher  2012 - 2014 
8.  03477  PhD Tomaž Kosmač  Materials science and technology  Head  2011 - 2014  505 
9.  35651  Igor Križnar  Stomatology  Researcher  2013 - 2014  20 
10.  17100  PhD Kristoffer Krnel  Materials science and technology  Researcher  2011 - 2014  188 
11.  16301  PhD Čedomir Oblak  Stomatology  Researcher  2011 - 2014  139 
12.  29548  PhD Sebastjan Perko  Materials science and technology  Junior researcher  2011 - 2012  20 
13.  27778  Natalija Petkovič Habe    Technical associate  2011 - 2013  21 
14.  19990  PhD Irena Pribošič  Materials science and technology  Researcher  2011 - 2012  36 
15.  15599  Tomislav Pustotnik    Technical associate  2013 - 2014 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  91,059 
2.  0381  University of Ljubljana, Faculty of Medicine  Ljubljana  1627066  48,417 
This project proposal addresses some of emerging problems related to fabrication of tetragonal zirconia (Y-TZP) based all-ceramic fixed partial dentures (FPDs), their cementation as well as the performance of these FPDs under clinical conditions. The relationship between the composition, microstructure and the mechanical properties of Y-TZP ceramics will be studied, as well as the mechanisms and the kinetics of the reactions leading to a material’s degradation under thermal and mechanical cyclic loading in a chemically aggressive environment of the oral cavity. Also considered in the project are chemical reactions and physical phenomena contributing to adhesion of commonly used dental cements to the core material of all-ceramic FPDs, as well as those relevant to bonding between the ceramic core and the veneering porcelain. Yet another part of the project is aimed at developing new and/or substitute materials as well as developing novel dental ceramic technologies, such as, for example, moderately porous Y-TZP ceramics exhibiting substantially reduced elastic modulus similar to that of the dentin, and a sufficiently high strength for dental applications. Diminished elastic mismatch is expected to reduce the magnitude of the stresses developed at the margin of the tooth and the restoration and therefore the likelihood of marginal seal failure and the onset of secondary caries.
Significance for science
This present research program is up-to-date as the zirconia market for dental application is growing ever greater and any contribution to a more fundamental understanding of the material and its behavior in-vivo is expected to be well received in the scientific community. We hope to further develop our knowledge of the principles regulating fabrication of tetragonal zirconia (Y-TZP) based all-ceramic fixed partial dentures (FPDs), their cementation as well as the performance of these FPDs under clinical conditions. It is also expected that our results will foster similar research work at both the academic and industrial levels, which should ultimately extend the long-term survival rate of zirconia-based dental restorations. Clearly, this project has not only scientific but also clinical benefits. Thus, for example, the clinical aspects of the project will apply the above principles to enhance the adhesive bond strength of the luting agent without damaging the ceramic surface in a time- and cost-effective manner
Significance for the country
The results of the proposed research will undoubtedly improve the quality of prosthetic and orthodontic care for patients in the Republic of Slovenia. Partial edentulism is in addition to medical an enormous economic problem, since the cost of rehabilitation significantly charges the public health care budget. We believe that the results of the research work under the proposed project will be immediately transferred to clinical practice. Thus, the routine use of the nanostructured coatings will extend the lifetime of prosthetic products, which will reduce the relatively long waiting periods for prosthetic rehabilitation and in addition, will also lower the costs of prosthetic care. The project also contributes to education of young researchers. Three researchers from the project team are university professors and are giving courses in ceramic engineering and bio-materials at the Faculty of natural sciences and engineeringat, University of Ljubljana and Jožef Stefan International postgraduate school.
Most important scientific results Annual report 2012, 2013, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2011, 2012, 2013, final report, complete report on dLib.si
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