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Lech B Dobrzanski
Centre ASKLEPIOS, Poland
Keynote: Dentist Case Rep
Statement of the Problem: In modern dentistry, as well as in medicine in general, various engineering devices are often used to replace components of the human body removed due to illness or, for example, during an accident, including but not limited to teeth removed for the reasons given or lost for other reasons, as well as due to developmental defects. Modern dentistry requires extensive engineering support based on the synergistic use of extensive knowledge in materials engineering, production engineering, and tissue engineering covered by the current stage of Industry 4.0 of the industrial revolution. This approach describes digitization and computerization in dentistry as Dentistry 4.0. Thanks to technology combining data obtained from the CBCT scanner, scanning of intraoral conditions, and computer-aided design, it is possible to integrate individual components and manufacture them using additive technologies, reducing potential bacterial threats, their weight, and the number of connecting elements. The lecture compares the results of tests on the Ti6Al4V titanium alloy and the Co25Cr5W5MoSi cobalt alloy produced by milling in a numerically controlled machining center (CNC) and additively by selective laser sintering (SLS) and on the structure and properties of the tested alloys. It has been shown that even small changes in technological conditions in the SLS production variant, especially laser power, laser beam diameter, and possible overlapping of working paths, significantly change the tensile and bending strength by two to almost two and a half times. The tensile and bending strength obtained in the most advantageous production variant using the SLS method is over 25% higher than in the case of materials milled from previously cast discs. Plug-and-play SLS terms provided by device manufacturers provide only about 60% of the capability. Structural, tribological, and electrochemical tests were carried out. The main reason for achieving low strength properties is high porosity reaching even more than 10% when the best properties are ensured when the porosity does not exceed 0.5%. In vitro biological studies using osteoblasts confirm a good tendency to multiply living cells on the medium produced under the most favorable SLS conditions. Conclusions: The use of the SLS additive technology for the production of dental implants and connectors made of titanium and cobalt alloys in combination with the digitization of dental diagnostics and computer-aided design and production of computeraided design/manufacturing (CAD/CAM) by the idea of dentistry 4.0 is the best choice for technology for the production of restorations prosthetic devices and implantological devices used in dentistry.
Recent Publications :
1. Dobrzański, L.B., Achtelik-Franczak, A., Dobrzańska, J., & Dobrzański, L. A. (2020). Comparison of the structure and properties of the solid Co-Cr-W-Mo-Si alloys used for dental restorations CNC machined or selective laser-sintered. Materials Performance and Characterization, 9(4), 556-578.
2. Dobrzanski L.A.; Dobrzanski, L.B., A. Achtelik-Franczak and J. Dobrzańska (2020); Application Solid Laser-Sintered or Machined Ti6Al4V Alloy in Manufacturing of Dental Implants and Dental Prosthetic Restorations According to Dentistry 4.0 Concept, Processes 8(6), 664;
3. Dobrzanski L.A.; Dobrzanski, L.B. (2020) Dentistry 4.0 concept in the design and manufacturing of prosthetic dental restorations. Processes, 8: 525.
Lech B. Dobrzanski is a graduate of the Silesian University of Technology in Gliwice, majoring in electronics and medical informatics. He completed his doctoral thesis and obtained a doctoral, degree in the interdisciplinary area of materials and dental engineering at the AGH University of Science and Technology in Krakow, Poland. He is a medical manager, dental engineer, coordinator of 10 Research and Development projects. He is an active researcher. He is the author of about 60 papers and chapters in international books. The number of citations is: 627 (GS), 325 (SC), 114 (WS), hindex: 16(GS), 13(SC), 7(WS). He is the author of 4 patents and 5 applications in the field of dental engineering. He received about 20 awards at invention fairs around the world. He is the author of 14 applications to the Patent Office in Poland for medical devices along with the conformity assessment. Since 2004, he has been continuously holding managerial positions in NGOs and private companies. He is a healthcare manager, including the President and CEO of Center SOBIESKI since 2011 and Center Asklepios since 2016. He is the Director of the Dental Engineering Center and the Head of the CAD/CAM Laboratory at the Asklepios Company. In the Asklepios Company, he implemented the IMSKA-MAT project in the years 2017-2022, acting as the deputy project manager. At SOBIESKI Company he implemented 4 completed research, development, and investment projects related to the expansion of the company’s offer, increasing its competitiveness and creating a unique offer of dental services and implementation of innovative prosthetic products on a national scale. These projects were financed from the EU and its own funds and resulted in a significant increase in the share of the company’s offer in the provincial and nationwide market. One of the projects involved the implementation of innovative dental services in the field of surgery, implantology, implant prosthetics, and the second implementation of innovative products and services in the field of dental engineering (innovative milled implant-prosthetic and prosthetic restorations) and the launch of an innovative CAD/CAM laboratory. The next 2 projects concerned the implementation of 2D-printed restorations
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