TY - JOUR
T1 - The Cortical Bone Trajectory for Lumbar Spine Fusion
AU - Shepherd, Daniel L.
AU - Alvi, Mohammed Ali
AU - Murphy, Meghan E.
AU - Kerezoudis, Panagiotis
AU - Corl, Frank
AU - Hitchon, Patrick W.
AU - Nassr, Ahmad
AU - Bydon, Mohamad
N1 - Publisher Copyright:
© 2017 Elsevier Inc.
PY - 2017/12
Y1 - 2017/12
N2 - Cortical bone trajectory, also called cortical screw trajectory, is a novel, less invasive fusion alternative for disorders affecting the lumbar spine. Cortical screw constructs have several touted advantages over traditional pedicle screw constructs. First, the surgical exposure required for instrumentation placement is less than that required for traditional pedicle screw placement. This reduced exposure can help reduce blood loss and other approach-related morbidity. Second, the unique screw trajectory, along with a cortically threaded screw, allows for increased cortical bone purchase within the lamina and pedicle. This improved bone purchase can result in improved screw pullout strength, and possibly reduce the chance of screw loosening. Finally, cortically placed screw heads rest on top of the vertebral lamina, which is significantly more medial than traditional pedicle screws, making them more accessible and rod placement more straightforward. Cortical bone trajectory has been validated with several biomechanical cadaveric studies and shows promise with early clinical testing. The cortical screw trajectory may provide patients with lumbar spine pathology a less invasive fusion alternative. This article serves to describe the operative technique and provides a current review of the literature.
AB - Cortical bone trajectory, also called cortical screw trajectory, is a novel, less invasive fusion alternative for disorders affecting the lumbar spine. Cortical screw constructs have several touted advantages over traditional pedicle screw constructs. First, the surgical exposure required for instrumentation placement is less than that required for traditional pedicle screw placement. This reduced exposure can help reduce blood loss and other approach-related morbidity. Second, the unique screw trajectory, along with a cortically threaded screw, allows for increased cortical bone purchase within the lamina and pedicle. This improved bone purchase can result in improved screw pullout strength, and possibly reduce the chance of screw loosening. Finally, cortically placed screw heads rest on top of the vertebral lamina, which is significantly more medial than traditional pedicle screws, making them more accessible and rod placement more straightforward. Cortical bone trajectory has been validated with several biomechanical cadaveric studies and shows promise with early clinical testing. The cortical screw trajectory may provide patients with lumbar spine pathology a less invasive fusion alternative. This article serves to describe the operative technique and provides a current review of the literature.
KW - cortical bone trajectory
KW - cortical screw trajectory
KW - lumbar fusion
KW - minimally invasive surgery
KW - spine surgery
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U2 - 10.1053/j.oto.2017.09.011
DO - 10.1053/j.oto.2017.09.011
M3 - Article
AN - SCOPUS:85031746598
SN - 1048-6666
VL - 27
SP - 269
EP - 274
JO - Operative Techniques in Orthopaedics
JF - Operative Techniques in Orthopaedics
IS - 4
ER -