Research progress on positioning accuracy of acetabulum prosthesis / 中国骨伤

ABSTRACT

In order to prevent the dislocation of total hip arthroplasty (THA) and reduce the wear rate, the position of the acetabular component in THA is very important. However, due to the influence of many potential factors, the accurate implantation of the acetabular component in the operation is still a challenge. Lewinnek safety zone positioning the cup anteversion angle (15±10)°, abduction (40±10)°, has been regarded as acetabular prosthesis installation standards, in an attempt to reduce the risk of instability, but there are still reported a dislocation. Based on the Lewinnek safety zone, Ha proposed the use of acetabular anatomical landmarks. According to patient specific shape positioning the position of the acetabular component methods are used to determine the specificity of the target area, thereby reducing the impact of hip replacement, and to maintain a lower liner wear rate. Image navigation system can improve the positioning of acetabular cup, but it is affected by many factors, such as high cost, difficult operation and so on.