Department of Orthopedic Surgery, Martin Luther University Halle-Wittenberg, Magdeburger Strasse 22, 06112 Halle (Saale), Germany.
Arch Orthop Trauma Surg. 2012 Jan;132(1):1-7. doi: 10.1007/s00402-011-1379-1. Epub 2011 Aug 28.
Correct cup positioning is one of the keys for successful total hip replacement. There are mechanical and computer assistant guides for correct cup positioning in the market. To optimize the cup positioning, the use of navigation systems is recommended. The aim of this study was to compare spatial orientation of the acetabulary entry plane in relation to tables plane which is used by mechanical guides as well as anterior pelvic plane used for cup orientation by navigation systems.
CT raw data of 80 Caucasians (160 acetabuli) (done in supine position) with osteoartritic hips were collected. 3-D pelvic reconstruction was generated using Amira software (Visage Imaging Berlin, Germany). Anterior pelvic plane and acetabulary entry plane were defined by reliable anatomical landmarks. Spatial orientation were calculated by a custom made program code for the Amira software.
There were no differences between anterior pelvic plane and table's plane as well as spatial orientation of acetabulary entry plane of both acetabuli in relation to anterior pelvic plane or table's plane. Furthermore, there was no correlation between age, sex or body mass index and spatial orientation of the acetabulary entry plane as well.
The use of mechanical alignment guides for cup orientation during total hip arthroplasty based on table's plane in patient's supine position is a successful method to achieve proper cup orientation.
正确的杯位定位是全髋关节置换成功的关键之一。市场上有用于正确杯位定位的机械和计算机辅助引导器。为了优化杯位定位，建议使用导航系统。本研究的目的是比较机械引导器使用的髋臼入口平面与表平面的空间方位关系，以及导航系统用于杯位定向的前骨盆平面。
收集了 80 名（160 个髋臼）白种人（患有骨关节炎的髋关节）的 CT 原始数据（仰卧位）。使用 Amira 软件（德国柏林 Visage Imaging）生成 3-D 骨盆重建。通过可靠的解剖学标志定义前骨盆平面和髋臼入口平面。使用 Amira 软件的自定义程序代码计算空间方位。
两个髋臼的前骨盆平面和表平面之间以及髋臼入口平面的空间方位没有差异，无论是相对于前骨盆平面还是表平面。此外，髋臼入口平面的空间方位与年龄、性别或体重指数之间也没有相关性。
在全髋关节置换术中，基于患者仰卧位的表平面使用机械对准引导器来确定杯位方向是一种实现适当杯位定向的成功方法。
