Doldo, T., L. Di Vece, E. Ferrari Cagidiaco, N. Nuti, S. Parrini, M. Ferrari, and F. Carboncini. “A New Generation of Orthodontic Retainer Using 3d Printing Technology: Clinical Cases Report”. Journal of Osseointegration, Vol. 10, no. 4, Nov. 2018, pp. 142-8, doi:10.23805/jo.2018.10.04.06.