Biomechanical experiment of non-stemmed anatomical total hip prosthesis arthroplasty in vitro.
- Author:
Qinming FEI
1
;
Shuizhong HONG
;
Tongyi CHEN
;
Zhongwei CHEN
;
Benwen QIAN
Author Information
1. Department of Orthopedics, Zhongshan Hospital, Fudan University, Shanghai 200032. Feiqm@163.net
- Publication Type:Journal Article
- MeSH:
Adult;
Arthroplasty, Replacement, Hip;
methods;
Biomechanical Phenomena;
Cementation;
methods;
Hip Prosthesis;
Humans;
Male;
Prosthesis Design;
methods
- From:
Journal of Biomedical Engineering
2005;22(1):104-107
- CountryChina
- Language:Chinese
-
Abstract:
Biomechanical test in vitro was performed to study the biomechanical characteristics of the femoral component in the non-stemmed anatomical total hip prosthesis (A-Fix) arthroplasty. It mimics two stages, the early stage with cementless and the later stage with cement fixation that imitates bone ingrowth. The results were compared with that of normal proximal femur by normalized coefficient analysis. Translation of femoral head after hip replacement is slightly more than normal. The strain of femoral neck after replacement is lower than that of normal. It changes flatly. The security coefficient in early stage is raised by 13% on the tensile side and by 27.6% on the compressive side of femoral neck; that in later stage is raised by 29.6% and by 22.1% separately. The maximal torsional angle of femoral head is minimal, it is 0.02 times that of normal in early stage and 0.01 times in later stage. It demonstrated that A-Fix arthroplasty has the characteristics of low stress and deformation, high intensity and rigidity, and anti-loosening, thus affording mechanical evidences for its clinical use.
