胸腰椎椎弓根钉置入导向器的设计及应用实验

Design of a guide device to place pedicle screws in the lower thoracic spine and lumbar spine and its cadaveric study

中文关键词:  椎弓根钉置入导向器 设计 实验 安全性 CT扫描

英文关键词:Low thoracic and lumber spine,Pedicle screw,Guide device,

中文摘要:

  目的：设计一种新型椎弓根钉置入导向装置，以期减少椎弓根钉置入的失败几率。方法：术前CT扫描拟置钉椎体，确定椎弓根轴线。右侧以导向器辅助钻孔，左侧徒手钻孔。钻孔后孔内置克氏针，椎弓根环绕钢丝，摄正侧位X线片，评价其准确程度。结果：导向器组36个椎弓根有2个椎弓根(5．6％)穿破，徒手组36个椎弓根有8个椎弓根(22％)失败。经统计学处理显示，两组结果有显著性差异。结论：应用新型导向器，能明显降低下胸椎及腰椎椎弓根钉置入中的失败率。

英文摘要:

  Objective:To design a guide device of pedicle screws placement,in order to decrease the accident of pedicle violations during pedicle screw placement.Method:Thirty-six spine specimens from T10to L5were used for pedicle screw placement.Two techniques of tr