Affiliation: | 1. Department of Prosthodontics, Dental Clinic, School of Dentistry University of Milan, , Italy;2. Department of Prosthodontics, Dental Clinic, School of Dentistry, , Italy;3. Department of Oral Surgery, Dental Clinic, School of Dentistry University of Milan, , Milan, Italy;4. Dental Clinic, School of Oral Surgery, University of Milan, , Milan, Italy;5. Department of Dentistry, School of Dentistry University of Messina, , Messina, Italy |