摘要
目的分析计算机辅助置入髋臼假体的可靠性和准确性。方法采用计算机辅助全髋关节置换手术30例。从计算机导航软件中获取术中显示髋臼假体的前倾角和外展角,并于术后骨盆平片上测算髋臼假体角度。结果术后1例假体下骨折,1例大粗隆骨折但无移位。平均切口长度(4.9±0.7)cm,手术时间(78.0±28.4)min,术中失血量(378.5±137.4)ml,术后引流量(551.6±257.1)ml。术中导航系统显示的前倾角与术后影像所测差异无统计学意义(P>0.05),而外展角差异则具有显著的统计学意义(P<0.01)。导航显示的髋臼杯方位全部位于Lewinnek安全区,术后影像所测显示有25例83%位于Lewinnek安全区,其余5例前倾角均位于安全区,而外展角则超出安全区。结论术中导航系统显示的前倾角有着较高的可靠性,而外展角的可靠性则较差。导航辅助置入髋臼假体前倾角的准确性较高,而外展角准确性则稍差。
Objective To analyze the reliability and accuracy of acetabular component orientation defined by computer navigation system.Methods Thirty cases treated using the operation total hip arthroplasty navigated by computer.The anteversion and inclination of acetabular component from both the navigation system and the planar radiography of pelvis with strict standing position were obtained.Results Two cases had complications.One was a fracture under the prosthesis;the other was a fracture of grand trochanter without displacement.The mean incision length was（4.9±0.7）cm.The mean operative time was（78.0±28.4） minutes.The mean intraoperative and postoperative blood loss was（378.5±137.4）ml and（551.6±257.1）ml respectively.The navigated anteversions had no statistical significance compared with radiographic ones（P 〉0.05）,but an extreme statistical significance（P 〈0.01） for inclinations.The acetabular component orientation defined by navigation located totally in the safe zone of lewinnek.But the radiographic data was 83%.Conclusion The anteversion defined by the navigation system is reliable,but that not for inclination.From the radiographic results,we can see that the navagation system can help us get an accurate anteversion in implanting the acetabular component,but not a very accurate inclination.
出处
《中国骨与关节损伤杂志》
2012年第6期481-484,共4页
Chinese Journal of Bone and Joint Injury
关键词
关节成形术
置换
髋臼
计算机辅助
Arthroplasty
Replacement
Acetabulum
Computer assisted
