Papaspyridakos P, et al. - Investigators analyzed 19 edentulous cases restored with 38 fixed complete dental prostheses (IFCDPs) to examine the outcomes and complications of double full-arch implant-supported IFCDPs after a mean observation period of 5.1 years. Two of 249 implants were failed yielding an overall implant survival rate of 99.2% and prosthesis survival rate of 92.1%. They found soft tissue recession with an estimated 5-year rate of 45.5% as the most common minor biologic complication whereas the most frequent major complication was peri-implantitis with an estimated 5-year implant-based rate of 9.5%. They also noted fracture of the prosthetic material as the most common major complication. They concluded the 5-year estimated cumulative rates for "prosthesis free of biologic complications", 50.7% and for "prosthesis free of technical complications", 57.1%.