Biomechanical Study of Pedicle Screw Fixation Systems for the Lumbar Spine
Since the pedicle screw system has a strong reduction force and a stabilization effect on unstable conditions of the spine, it is used not only in cases of spinal injury [1–5] but also for spondylolisthesis, spinal canal stenosis, total vertebral replacement, and other segmental instabilities [6–12]. At present, various types of pedicle screws which have different mechanical properties have been developed and applied in many cases [10,12–20]. However, complications of pedicle screw fixation have been reported in a variety of different applications [2,4,12,21–24]. These complications include the spinal implant failures whose incidence is higher than that of other orthopedic implants .
KeywordsPedicle Screw Endurance Limit Spinal Instrumentation Pedicle Screw Fixation Spinal Canal Stenosis
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