Zavanelli AC, Zavanelli RA, de Aquino Souza JE, da Silva NR, Coelho PG, Ferracioli RC. Retention Strength of Cobalt-Chromium vs Nickel-Chromium Titanium vs CP Titanium in a Cast Framework Association of Removable Partial Overdenture. J Contemp Dent Pract 2011; 12 (3):179-186.