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E Jung, Ronald; Zembic, Anja; Pjetursson, Bjarni E; Zwahlen, Marcel; S Thoma, Daniel (2012). Systematic review of the survival rate and the incidence of biological, technical, and aesthetic complications of single crowns on implants reported in longitudinal studies with a mean follow-up of 5 years. Clinical oral implants research, 23 Suppl 6, pp. 2-21. Oxford: Wiley-Blackwell 10.1111/j.1600-0501.2012.02547.x
