Grecchi , F., M. Di Girolamo, F. Cura, V. Candotto, and F. Carinci. “A NEW SYSTEM OF IMPLANT ABUTMENT CONNECTION: HOW TO IMPROVE A TWO PIECE IMPLANT SYSTEM SEALING”. Oral & Implantology, vol. 10, no. 3, Sept. 2017, pp. 234-40, https://www.oimplantology.org/oimp/article/view/210.