Tabella 4.14 - Articular couplings in primary and total revision surgeries - A.P. of Bolzano during the years 2010 - 2018 "";"Primary prosthesis";;"Total revisions"; "Articular coupling";"No.";"%";"No.";"%" "Ceramics-Ceramics";5912;63,8;55;30,6 "Ceramics - Polyethylene";1948;21,0;47;26,1 "Ceramics - Polyethylene crosslinked";1065;11,5;37;20,6 "Metal-Polyethylene";49;0,5;11;6,1 "Metal- Polyethylene crosslinked";33;0,4;6;3,3 "Metal-Metal";17;0,2;1;0,6 "Other combinations*";238;2,6;23;12,8 "Totale";9262;100,0;180;100,0 Note: * 96 unidentified articular couplings www.provincia.bz.it/salute-benessere/osservatorio-salute/ Register of Pathology - Hip Replacement Processing by the Health Observatory - 21.06.2019