1994 年 43 巻 2 号 p. 475-478
We used post operative CT imaging to evaluate 20 patients who were treated with Titanium spinal pedicle screws. We evaluated the appropriateness of screw insertions. Pedicle screw angles were measured in 96 screws. These were decreased in lower lumbar spines. Three screws penetrated medial pedicles 5 screws penetrated the lateral wall of pedicles and 8 screws penetrated anterior walls of the vertebral bodies. Incorrectly inserted screws which penetrated the anterior walls of the vertebral bodies had the qreater disparity between pedicle screw angle and transverse pedicle angle.