Tabella 4.19 - Number of primary surgeries in case of total replacement by dimension and material of the head - A.P. of Bolzano during the years - 2018 "";"Diameter of the head (mm)";;;;;;;;; "";"22";;"28";;"32";;"36";;">=38"; "Head material";"No.";"%";"No.";"%";"No.";"%";"No.";"%";"No.";"%" "Metal";1;16,7;44;16,4;14;0,6;47;0,9;13;1,7 "Ceramics";5;83,3;224;83,6;2519;99,4;5066;99,1;747;98,3 "Grand total";6;100,0;268;100,0;2533;100,0;5113;100,0;760;100,0 Note: * 594 unidentified head measures www.provincia.bz.it/salute-benessere/osservatorio-salute/ Register of Pathology - Hip Replacement Processing by the Health Observatory - 21.06.2019