M Mascitti1, A Santarelli1, O Di Fede2, C Rubini3, L Lo Muzio4. 1. Department of Specialistic and Odontostomatological Sciences, Polytechnic University of Marche, Ancona, Italy. 2. Department of Surgical, Oncologic and Stomatologic Sciences, University of Palermo, Italy. 3. Department of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona, Italy. 4. Department of Sperimental and Clinical Medicine, University of Foggia, Italy.