1. Department of Biomedical and Dental Sciences, Morphological and Functional Images, University of Messina, 98100 Messina, Italy
2. Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialties, University of Campania “Luigi Vanvitelli”, 80121 Naples, Italy
3. Department of Prosthodontics, Dr D.Y. Patil Dental College and Hospital, Dr D.Y. Patil Vidyapeeth, Pimpri, Pune, India
4. Department of Dentistry, Faculty of Dental Sciences, University of Aldent, 1007 Tirana, Albania
5. Department of Engineering, Morphological and Functional Images, University of Messina, 98100 Messina, Italy