TY - JOUR
T1 - Triangulated pedicle screw construct technique and pull-out strength of conical and cylindrical screws
AU - Ono, A.
AU - Brown, M. D.
AU - Latta, L. L.
AU - Milne, E. L.
AU - Holmes, D. C.
PY - 2001
Y1 - 2001
N2 - To compare the mechanical effectiveness of a new conical screw design with a conventional cylindrical screw design, the screw insertion time, torque, and pull-out strength of single-pedicle screw and triangulated-pedicle screw constructs of each type of screw were compared in human cadaveric vertebral bodies. The time required to insert the conical screws was less than that required for cylindrical screws. Regression analysis revealed a positive correlation between insertion torque and pull-out strength of single and triangulated constructs of each type of screw. The conical screw had a greater increase than the cylindrical screw in the pull-out strength of triangulated pedicle screw constructs. Application of the new conical screw design was significantly faster, and the new screw had better mechanical fixation to the vertebral body than did the conventional cylindrical screw tested.
AB - To compare the mechanical effectiveness of a new conical screw design with a conventional cylindrical screw design, the screw insertion time, torque, and pull-out strength of single-pedicle screw and triangulated-pedicle screw constructs of each type of screw were compared in human cadaveric vertebral bodies. The time required to insert the conical screws was less than that required for cylindrical screws. Regression analysis revealed a positive correlation between insertion torque and pull-out strength of single and triangulated constructs of each type of screw. The conical screw had a greater increase than the cylindrical screw in the pull-out strength of triangulated pedicle screw constructs. Application of the new conical screw design was significantly faster, and the new screw had better mechanical fixation to the vertebral body than did the conventional cylindrical screw tested.
KW - Conical pedicle screw
KW - Cylindrical pedicle screw
KW - Pull-out strength Triangulated pedicle screw construct
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U2 - 10.1097/00002517-200108000-00007
DO - 10.1097/00002517-200108000-00007
M3 - Article
C2 - 11481554
AN - SCOPUS:0034888612
VL - 14
SP - 323
EP - 329
JO - Journal of Spinal Disorders
JF - Journal of Spinal Disorders
SN - 0895-0385
IS - 4
ER -