Fig. 4
Design and parameters of bone cement injectors. A The 4-hole sheath; B The 6-hole sheath; C The 8-hole sheath; D The straight pore sheath; E The steel rod for the sheath; FÂ The physical looking of the injectors (a indicates the straight pore sheath, b indicates the 4-hole sheath, c indicates the 6-hole sheath, d indicates the 8-hole sheath, and e indicates the steel rod)