Figure 3From: Pullout strength of pedicle screws with cement augmentation in severe osteoporosis: A comparative study between cannulated screws with cement injection and solid screws with cement pre-filling A radiological photograph showing the test block and the inserted conical and cylindrical screws following cement augmentation (top) and specimens after the pullout tests (bottom). (A) A conical solid screw with cement pre-filling, (B) a cylindrical solid screw with cement pre-filling, (C) a conical cannulated screw with cement injection and (D) a cylindrical cannulated screw with cement injection.Back to article page