The Pullout Performance of Pedicle Screws by Teyfik Demir, Cemile Basgül

By Teyfik Demir, Cemile Basgül

This short e-book systematically discusses all topics that impact the pullout power of pedicle screws. those screws are utilized in spinal surgical procedures to stabilize the backbone. The keeping power of the pedicle screw is essential on the grounds that loosening of the pedicle screws could cause revision surgical procedures. as soon as the pedicle screw is pulled out, it really is more durable to acquire similar stabilization for the fused vertebrae. The ebook reports the influence of screw designs, program recommendations, cement augmentation, coating of the screw and attempt stipulations at the pullout power. The stories with finite point research have been additionally included.

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Extra resources for The Pullout Performance of Pedicle Screws

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Additionally, Lehman et al. [27] investigated two different insertion techniques by straight forward and anatomic trajectories of pedicle screws. As a result, straight forward trajectory achieved 39 % higher maximum insertional torque and 27 % higher pullout strength than anatomic trajectory. Moreover, Fürderer et al. 1 Different angles between two pedicle screws inserted in a vertebra human cadaveric vertebrae. Pullout strength of pedicle screw for each fixation techniques was recorded. Although transpedicular fixation provided higher pullout strength than trans-transverse and supratransverse techniques, there was no significant difference between these three application types.

There was also a noncemented control group. Pullout strengths of pre-filled and injected after screw insertion groups did not differ statistically from each other, although both of them were significantly higher than control group. However, pre-filled cannulated screws showed lower extraction torque and higher pullout strength than screws 38 4 Effect of Cement Augmentation with cement injected after insertion, which is useful information for revision surgeries. Along similar lines, Chen et al. [9] compared solid screws with prefilled cement and cannulated screws with PMMA injection during perforation on polyurethane blocks demonstrating the severe osteoporosis.

Bianco RJ, Arnoux PJ, Mac-Thiong JM, Wagnac E, Aubin CE (2013) Biomechanical analysis of pedicle screw pullout strength. Brasiliense LB, Lazaro BC, Reyes PM, Newcomb AG, Turner JL, Crandall DG, Crawford NR (2013) Characteristics of immediate and fatigue strength of a dual-threaded pedicle screw in cadaveric spines. Chang MC, Kao HC, Ying SH, Liu CL (2013) Polymethylmethacrylate augmentation of cannulated pedicle screws for fixation in osteoporotic spines and comparison of its clinical 20 2 Effect of Screw Design results and biomechanical characteristics with the needle injection method.

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