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Sailer, Irena; Philipp, Alexander; Zembic, Anja; Pjetursson, Bjarni E; Hämmerle, Christoph H F; Zwahlen, Marcel (2009). A systematic review of the performance of ceramic and metal implant abutments supporting fixed implant reconstructions. Clinical oral implants research, 20(s4), pp. 4-31. Oxford: Wiley-Blackwell 10.1111/j.1600-0501.2009.01787.x
