“…The metallic component used was variable and included K-wires, Steinmann pins, rush pins, intramedullary nails, plates, steel rods, cerclages, femoral stems, and antibiotic-coated prostheses (Table 1 ). In detail, 30 studies reported on spacers with a metallic core [ 9 – 11 , 16 , 18 , 19 , 24 – 32 , 35 – 38 , 41 , 42 , 44 – 51 ], 8 studies on metal-free spacers [ 2 , 17 , 23 , 33 , 34 , 39 , 40 , 43 ], and two studies presented a series in which spacers both with and without metal components were included [ 14 , 15 ] (Table 1 ).…”