1Faculty of Medicine, Department of Preventive Dentistry, Titu Maiorescu University, Bucharest, Romania
2Faculty of Dentistry, Department of Preventive Dentistry, University of Medicine and Pharmacy, Craiova, Romania
3Faculty of Medicine, Department of Oral Rehabilitation, Titu Maiorescu University, Bucharest, Romania
4Faculty of Medicine, Department of Prosthetics, Titu Maiorescu University, Bucharest, Romania
5Faculty of Dentistry, University of Medicine and Pharmacy Carol Davilla, Bucharest, Romania