1. Department of Neurosciences, Reproductive and Odontostomatological Sciences, Division of Prosthodontics, Scientific Unit of Digital Dentistry, University “Federico II” of Naples, Naples, Italy
2. Department of Prosthodontics and Dental Materials, School of Dentistry, University of Siena, Siena, Italy
3. Center of Dental Medicine, Clinic of Reconstructive Dentistry, University of Zurich, Zurich, Switzerland
4. Department of Clinical and Experimental Medicine, School of Dentistry, University of Foggia, Foggia, Italy