Affiliation: | a Associate Professor, Department of Operative Dentistry. Dental School, University of Athens, Athens, Greece b Postgraduate student, Department of Operative Dentistry. Dental School, University of Athens, Athens, Greece c Postgraduate student, Department of Operative Dentistry Dental School, University of Athens, Athens, Greece d Associate Professor, Division of Removable Prosthodontics. Dental School, University of Athens, Athens, Greece |