Fig. 4From: Calcium phosphate cement promotes the stability of osteoporotic lumbar pedicle screw by enhancer-injecters with different number of holesThe distribution of bone cement in module based on CT. (A) CT scan of the 4-hole group; (B) CT scan of the 6-hole group; (C) CT scan of the 8-hole group; (D) CT scan of the straight pore groupBack to article page