脊柱虚拟手术系统术前测量胸腰椎椎弓根植钉准确性的实验研究

目的应用脊柱虚拟手术系统(spinal virtual surgery system,SVSS)进行脊柱胸腰段椎弓根钉固定术前设计,建立植钉相关参数测量的方法;通过对SVSS植钉相关参数与实际测量参数进行统计学分析比较,验证SVSS测量的准确性。方法取成人胸腰段脊柱标本8具(T11～L3椎体节段),先用SVSS进行椎弓根植钉术前设计和各椎体节段椎弓根左右两侧相关参数的测量,包括外展角(angle of axial view,Aa)、头倾角(angle of sagittal view,As)、入点横坐标(x-direction entrance,XE)、轴位面上测量的椎弓根轴线骨性通道全长(total pedicle length of axial view,TLa)、矢状位面上测量的椎弓根轴线骨性通道全长(total pedicle length of sagittal view,TLs)、椎弓根狭部皮质骨高度(pedicle height,PH)、椎弓根狭部皮质骨宽度(pedicle width,PW)、椎弓根狭部松质骨宽度(pedicle spongy width,PSW);然后完成尸体标本椎弓根植钉左右两侧相关参数的实际测量;最后进行虚拟植钉相关参数和实际植钉相关参数的统计学分析。结果虚拟测量(Aa、As、TLa、TLs、XE、PW、PSW、PH)和实际测量(Aa、As、TLa、XE、PW、PSW、PH)椎弓根左右两侧植钉的所有相关参数差异均无统计学意义(P>0.05)。除L3节段的XE及T11和T12节段的PSW的虚拟测量值与实际测量值比较差异有统计学意义(P<0.05)外,其他各节段各参数虚拟测量值与实际测量值比较差异均无统计学意义(P>0.05)。结论经过与实际测量参数进行统计学分析,验证了SVSS进行胸腰椎椎弓根钉固定术前设计的可行性和测量的准确性。

ACCURACY STUDY ON PREOPERATIVE MEASUREMENT OF PEDICLE SCREW FIXATION FOR THORACOLUMBAR VERTEBRA IN SPINAL VIRTUAL SURGERY SYSTEM

Objective To employ spinal virtual surgery system(SVSS) for preoperative planning of thoracolumbar pedicle screw fixation,and to establish the measurement method for pedicle screw-related parameters.Methods Eight thoracic and lumbar spine specimens(T11-L3) were selected.First of all,SVSS was used for the preoperative planning of pedicle screw and the parameters of both sides of pedicle were measured in every vertebral segment,including angle of axial view(Aa),angle of sagittal view(As),x-direction entrance(...