青少年胸椎椎弓根螺钉相关角度的CT解剖学研究

Anatomic study of thoracic pedicle screws angle of teenagers by CT

目的通过对青少年胸椎螺钉进钉角的三维测量,为临床应用提供有价值的数据。方法用16排螺旋CT对正常青少年(14～17岁)自愿者40例进行全胸椎扫描,利用采集到的数据进行多平面三维重建,测量螺钉进钉角(e角、f角)。结果 e角:总体变化规律为逐渐减小,T10以上均为正角,T11～12几乎均为负角,即椎弓根尾端与椎骨正中矢状轴成角;f角:先减小后增大,再减小的趋势。结论青少年胸椎椎弓根螺钉置入角有一定规律,手术时时应根据不同节段椎弓根的形态特点,结合影像学资料,选择相应的螺钉进钉角度。

Objective Through 3D measurement of thoracic vertebral screw angle of teenagers,to provide valuable data for clinical application.Methods All the thoracic vertebrae of 40 healthy volunteers(14-17 years old) were scanned with 16-row Spiral CT.Use the collected data to reconstruct 3D multiple planes to measure the thoracic vertebral screw angle(Angle E,Angle F).Results Angle E: the overall variation was decreased gradually.Above T10(from T1 to T10) were all positive angles;T11-T12 were mostly negative angles.That was the end of pedicle of vertebral arch was formed into angles with the right middle of the vertebral sagittal axis;Angle F: The angles first decreased,then increased and then decreased again. Conclusions There is a certain rule of the thoracic vertebral screw angle of teenagers.When operating,we should select thoracic pedicle screws angle according to morphologic characteristics of different segments.