1 Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, Rome, Italy.
2 Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, Rome, Italy, Phone: +393282177087, e-mail: francesco.pagnoni22@gmail.com.
3 Department of Conservative Dentistry, College of Dental Medicine, Roseman University of Health Sciences, South Jordan, Utah, United States of America.