Biomechanical Comparison of Pedicle Screw Augmented with Different Volumes of Polymethylmethacrylate in Osteoporotic and Severely Osteoporotic Synthetic Bone Blocks in Primary Implantation: An Experimental Study

Figure 5

The remains of screw after pullout from 1522-507# blocks and 1522-505# blocks. “A1,” “A2,” “A3,” “A4,” and “A5” indicate group A1, group A2, group A3, group A4, and group A5, respectively. “B1,” “B2,” “B3,” “B4,” and “B5” indicate group B1, group B2, group B3, group B4, and group B5, respectively.