Dr. Varvara Adrian Mihai has graduated in 2011 from University of Medicine and Pharmacy “Iuliu Hatieganu” Cluj Napoca, Romania. He obtained his specialist title in Endodontics in 2014, and the competence in Dental Implantology in 2015. From october 2015 he is a PhD student at the same university. Dr. Varvara is currently assistant professor at Dental Propedeutics and Esthetics discipline, Prosthodontic Dentistry and Dental Materials Departmentat, Faculty of Dentistry, University of Medicine and Pharmacy - Cluj-Napoca, and he works in a private clinic as well. He is interested in areas such as: CAD CAM technics and materials, 3D printing, Digital dentistry, Dental photography and Esthetics rehabilitation.
Fiber glass reinforced composite for CAD CAM
Abstract: Fiber glass reinforced composite for CAD CAM Authors: Adrian Mihai Varvara1, Elena Bianca Varvara1, Cristina Gasparik1, Valentin Toma2, Cristina Prejmerean3, Bogdan Culic1 Authors’ affiliations: 1 Department of Prosthetic and Dental Materials, Faculty of Dental Medicine, University of Medicine and Pharmacy "Iuliu Hațieganu" Cluj Napoca, Romania 2 Research Center for Advanced Medicine MedFUTURE, University of Medicine and Pharmacy "Iuliu Hațieganu" Cluj Napoca, Romania 3 Institute of Research in Chemistry “Raluca Ripan”, Babes- Bolyai University, Cluj Napoca, Romania Introduction. In the last three decades, exciting new developments in dental materials and computer science have led to the success of contemporary dental computer-aided design - computer-aided manufacturing (CAD-CAM) technology. Each year, new materials appear with improved properties and qualities. The objective of the work was to develop a new cad cam milling material using fiber glass reinforced composite. Materials and method. A selection of 2 different types of resins (R1 composed from 25%Bis-GMA, 40%UEDMA, 35% DMTEG and R2 composed from 65%Bis-GMA, 35% DMTEG) with 2 different types of hybrid filler (F1 with 42% quartz, 42% radiopaque glass and 16 % hydroxyapatite and F2 with 90% quartz and 10% colloidal silica) and 3 different types of E type fiber glass geometries (veil 30g/m2, twill 163g/m2 and textile 300g/m2) in 4, 6, 8 and 10 layers were used in this in vitro study. Inside of a silicon cube of 1 cm side, layers of resin and fiber glass were placed one above another. After each layer a light curing process of 10 seconds was done in 5 different points. 2 mm thick samples were cut with a precision saw (Isomet 1000, Buehler, USA) and investigated with SEM and Raman spectroscopy. Data were analyzed with dedicated software. Results. Raman analysis, showed a powerful interaction between the polymer and the fiber glass. SEM data revealed that the different fiber glass geometries were well incorporated inside the resin, resulting an acceptable homogeneity. Conclusions. Within the limitation of this study, it seems that it is possible to achieve a fiber glass reinforced composite for the use of CAD CAM technology. Further investigation must be done in order to test all the properties of the new material. Key words: CAD CAM, composite, fiber glass Acknowledgement: This work was supported by the Romanian National Authority for Scientific Research and innovation, UEFISCDI, project PN-III-P2-2.1-PED-2016-1936