Carl A L, Khanuja H S, Sachs B L, Gatto C A, vomLehn J, Vosburgh K, Schenck J, Lorensen W, Rohling K, Disler D
Division of Orthopaedic Surgery, Albany Medical College, New York, USA.
Spine (Phila Pa 1976). 1997 May 15;22(10):1160-4. doi: 10.1097/00007632-199705150-00018.
Frameless stereotaxy with doppler ultrasound and three dimensional computer model registration is assessed in vitro for pedicle screw placement.
To identify feasibility of pedicle screw navigation and placement using this technology.
Inaccurate pedicle screw placement can lead to neurovascular injury or suboptimal fixation. Present techniques in pedicle screw placement involve only confirmation of hole orientation.
Forty-four pedicle screws were placed in lumbosacral models and cadaver specimens. Accuracy was assessed with a computed tomography scan and vertebral cross sectioning.
All screws were intrapedicular. Accuracy of anterior cortical fixation was 1.5 mm, with a range of 2.5 mm.
In vitro frameless stereotaxy is accurate for pedicle screw placement. This technology adds a component of navigation to pedicle screw placement.
对使用多普勒超声和三维计算机模型配准的无框架立体定向技术进行椎弓根螺钉置入的体外评估。
确定使用该技术进行椎弓根螺钉导航和置入的可行性。
椎弓根螺钉置入不准确可导致神经血管损伤或固定效果欠佳。目前椎弓根螺钉置入技术仅涉及孔方向的确认。
将44枚椎弓根螺钉置入腰骶部模型和尸体标本中。通过计算机断层扫描和椎体横断面检查评估准确性。
所有螺钉均位于椎弓根内。前皮质固定的准确性为1.5毫米，范围为2.5毫米。
体外无框架立体定向技术在椎弓根螺钉置入方面准确。该技术为椎弓根螺钉置入增加了导航组件。
