1. Department of Prosthetic Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
2. University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
3. Department of Engineering and Management of Technological Systems, Faculty of Mechanics, University of Craiova, 200585 Craiova, Romania
4. Department of Biophysics, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania