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For a long time, lumbar pedicle screw fixation and fusion has been regarded as the gold standard for the treatment of the lumbar spine degenerative diseases. However, in patients with osteoporosis, pedicle screw fixation often fails to obtain long-term satisfactory. In recent years, the emergence of cortical bone trajectory screw has become an alternative option for dealing with these problems. With the development of clinical and basic research, scholars have found that cortical bone screw internal fixation can help improve fixation st