Pedicle screw anchorage of carbon fiber-reinforced PEEK screws under cyclic loading

European spine journal: official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society

Richard A. Lindtner¹  Rene Schmid² 

[1] Medical University of Innsbruck;icotec ag

关键词: Pedicle screw;    Pedicle screw loosening;    Polyetheretherketone;    PEEK;    Carbon fiber-reinforced PEEK;    Pedicle screw augmentation;    Cyclic loading;    Biomechanics;    Osteoporosis;    Elastic modulus;    Spine;    Posterior instrumentation;    Spinal tumors;   

DOI  :  10.1007/s00586-018-5538-8

学科分类：骨科学

来源: Springer

【 摘 要 】

PurposePedicle screw loosening is a common and significant complication after posterior spinal instrumentation, particularly in osteoporosis. Radiolucent carbon fiber-reinforced polyetheretherketone (CF/PEEK) pedicle screws have been developed recently to overcome drawbacks of conventional metallic screws, such as metal-induced imaging artifacts and interference with postoperative radiotherapy. Beyond radiolucency, CF/PEEK may also be advantageous over standard titanium in terms of pedicle screw loosening due to its unique material properties. However, screw anchorage and loosening of CF/PEEK pedicle screws have not been evaluated yet. The aim of this biomechanical study therefore was to evaluate whether the use of this alternative nonmetallic pedicle screw material affects screw loosening. The hypotheses tested were that (1) nonmetallic CF/PEEK pedicle screws resist an equal or higher number of load cycles until loosening than standard titanium screws and that (2) PMMA cement augmentation further increases the number of load cycles until loosening of CF/PEEK screws.

【 授权许可】

CC BY