A method to calculate the acetabular cup anteversion after total hip replacement based on 3D coordinate system
 作者： Zhenhua Zhang,  Fujie Sun,  Jie Li,  Hongbiao Li,  Yiqi Deng,  Guodong Yin 作者单位： 1Department of Orthopedics, Huxi Hospital (Shanxian Central Hospital), Jining Medical University, Jining, China 刊名： Journal of Biomedical Science and Engineering, 2013, Vol.06 (10), pp.964-966 来源数据库： Scientific Research Publishing Journal DOI： 10.4236/jbise.2013.610119 关键词： Hip Joint;  Replacement;  Acetabular;  Anteversion;  Calculation Formula; 原始语种摘要： Aim: To explore an accurate method to calculate acetabular cup anteversion after total hip arthroplasty. Method: 1) A 3D coordinate system was established with the center of the hip joint rotation center base as coordinate center. The acetabular exit plane and Pettersson formula acetabular anteversion and Riten Pradhan formula acetabular anteversion and acetabular true anteversion were drawn; 2) Determine the mathematical expression of Pettersson formula acetabular anteversion α and Riten Pradhan formula acetabular anteversion β in the coordinate system. The true acetabular anteversion is projection angle of Pettersson formula acetabular anteversion α on cross-section in the presence of acetabular abduction δ , determining mathematical expression of the acetabular anteversion θ by... trigonometric functions. Results: Real acetabular cup anteversion θ = arctg (tg β /cos δ ). Conclusion: The true acetabular cup anteversion and Pettersson formula anteversion and Riten Pradhan for mula anteversion were quite different. The difference was increased with the acetabular cup abduction angle increased. The formula was simple and accurate and worthy of clinical reference.

• 精确的　中心
• acetabular　髋臼
• anteversion　前倾
• replacement　交代
• abduction　外展
• arthroplasty　关节成形术
• coordinate　坐标
• total　总和
• center　中心
• accurate　中心
• calculate　计算