[1] Univ Milan, Dept Biomed Surg & Dent Sci, I-20122 Milan, Italy
[2] Fdn IRCCS CaGranda Osped Maggiore Policlin, Maxillo Facial & Odontostomatol Unit, I-20122 Milan, Italy
[3] Univ Pavia, Dept Clin Surg Diagnost & Pediat Sci, Sect Dent, I-27100 Pavia, Italy