Hakki Sam, Bilotta Victor, Oliveira J Daniel, Dordelly Luis
Bay Pines Medical Center, Bay Pines, Florida, USA.
Orthopedics. 2010 Oct;33(10 Suppl):43-7. doi: 10.3928/01477447-20100510-52.
There are 2 distinct methods of cup navigation in total hip arthroplasty. One predicts orientation of the acetabulum through bony landmarks outside the acetabulum (eg, the anterior pelvic plane); its unreliability is well published. The other identifies acetabular center axis (ACA) and is patient-specific method that is independent of pelvic tilt, making it more reliable. Data from readily palpable acetabular registration points were compared with postoperative pelvic computed tomography images in 137 cases. Findings show that ACA software is accurate in determining acetabular/cup version and inclination. Cup center axis should coincide within 4 mm of ACA to minimize impingement and maximize stability without altering preoperative femoral version.
全髋关节置换术中共有两种不同的髋臼定位方法。一种是通过髋臼外的骨性标志（如骨盆前平面）来预测髋臼的方向；其不可靠性已被充分报道。另一种是确定髋臼中心轴（ACA），这是一种针对患者的方法，与骨盆倾斜无关，因此更可靠。在137例患者中，将易于触及的髋臼注册点的数据与术后骨盆计算机断层扫描图像进行了比较。结果表明，ACA软件在确定髋臼/髋臼杯的前倾角和外展角方面是准确的。髋臼杯中心轴应与ACA在4毫米范围内重合，以在不改变术前股骨前倾角的情况下将撞击风险降至最低并使稳定性最大化。
