Gertzbein S D, Robbins S E
Department of Surgery, Faculty of Medicine, University of Toronto, Sunnybrook Medical Centre, Ontario, Canada.
Spine (Phila Pa 1976). 1990 Jan;15(1):11-4. doi: 10.1097/00007632-199001000-00004.
The accuracy of pedicular screw placement was assessed in 40 consecutive patients treated with the AO "Fixateur Interne." Postoperative CT scans were used to measure canal encroachment from the medial border of the pedicle, the angle of insertion and the point of entry. Eighty-one percent of the screws were placed within 2 mm of the medial border of the pedicle and 6% had 4-8 mm of canal encroachment with two patients developing minor neurological complications that spontaneously resolved. Four percent were inserted lateral to the pedicle. The parameters linked to satisfactory screw placement include entry point, angle of insertion and pedicular isthmus widths. Improvement in accuracy was noted in the latter 25% of screw insertions, reflecting the learning curve associated with this technique.
对连续40例接受AO“内固定器”治疗的患者评估椎弓根螺钉置入的准确性。术后CT扫描用于测量椎弓根内侧缘的椎管侵犯、置入角度和进针点。81%的螺钉位于距椎弓根内侧缘2mm范围内，6%有4-8mm的椎管侵犯，2例患者出现轻微神经并发症且自行缓解。4%的螺钉插入椎弓根外侧。与满意的螺钉置入相关的参数包括进针点、置入角度和椎弓根峡部宽度。在后25%的螺钉置入中注意到准确性有所提高，反映了与该技术相关的学习曲线。
