1. Goldstein Center for Esthetic and Implant Dentistry, Department of Restorative Sciences, Augusta University, Augusta, USA
2. Dentistry Department, Vita e Salute San Raffaele University, Milan, Italy
3. Department of Chemical Science and Technologies, Materials for Health, Environment and Energy - Dentistry, University of Tor Vergata, Rome, Italy
4. Department of Oral Surgery, University of Szeged, Szeged, Hungary
5. Department of Mathematics, University of Rome Tor Vergata, Rome, Italy
6. Department of Odontostomatological and Maxillofacial Sciences, Sapienza University, Rome, Italy