Su Peiqiang, Ma Ruofan, Li Chunhai, Liu Shangli, Huang Dongsheng
Department of Orthopedics, The Second Affiliated Hospital of Sun Yat-Sen University, Guangzhou, People's Republic of China.
Clin Orthop Relat Res. 2007 Sep;462:99-104. doi: 10.1097/BLO.0b013e3180ebe4e5.
This is an anatomic, preclinical study using computed tomography and computerized simulation to describe the morphologic features and ideal screw insertion trajectories for cervical pedicles in the southern Chinese population. The morphologic features of the pedicle of vertebrae (C3-C7) from 20 human cadaver spines were evaluated with computed tomography and with manual measurements. There was no difference between the two data sets. The topography of the cervical pedicles was recreated graphically, calculating the safe range of the insertion angle with and without consideration of the pedicle screw diameter. Neglecting the diameter of the screw, the average safe ranges of the insertion angle at each cervical level (C3-C7) in the transverse plane were 18.7 degrees , 20.4 degrees , 22.4 degrees , 22.5 degrees , and 27.6 degrees , respectively, and in the sagittal plane 27.6 degrees , 30.3 degrees , 27.7 degrees , 29.0 degrees , and 34.9 degrees , respectively. Including the diameter of the 3.0-mm screw, the safe ranges narrowed to 7.3 degrees , 8.6 degrees , 11.0 degrees , 13.1 degrees , and 15.5 degrees in the transverse plane, and 16.4 degrees , 18.7 degrees , 16.4 degrees , 18.3 degrees , and 23.1 degrees in the sagittal plane. We think computed tomography measurements can provide individual quantitative data for transpedicle screw fixation in the cervical spine.
这是一项解剖学的临床前研究，使用计算机断层扫描和计算机模拟来描述中国南方人群颈椎椎弓根的形态特征和理想的螺钉置入轨迹。对20具人类尸体脊柱的第3至7颈椎椎弓根的形态特征进行了计算机断层扫描和手动测量评估。两组数据之间没有差异。以图形方式重建了颈椎椎弓根的局部解剖结构，计算了考虑和不考虑椎弓根螺钉直径时的安全置入角度范围。不考虑螺钉直径时，各颈椎节段（C3-C7）在横平面的平均安全置入角度范围分别为18.7度、20.4度、22.4度、22.5度和27.6度，在矢状平面分别为27.6度、30.3度、27.7度、29.0度和34.9度。包括3.0毫米螺钉直径时，横平面的安全范围缩小至7.3度、8.6度、11.0度、13.1度和15.5度，矢状平面为16.4度、18.7度、16.4度、18.3度和23.1度。我们认为计算机断层扫描测量可为颈椎椎弓根螺钉固定提供个体定量数据。
