The initial stability of CF/PEEK femoral stem after total hip replacement
- VernacularTitle:碳纤维增强聚醚醚酮股骨头假体置换术后的即刻稳定性
- Author:
Zhenglian ZHANG
;
Junying SUN
;
Kang SUN
- Publication Type:Journal Article
- Keywords:
Initial stability;
Femoral prosthesis;
Arthroplasty, replacement, hip;
Carbon fiber reinforced polyetheretherketone(CF/PEEK);
Cobalt-chrome molybdemum alloy(CoCrMo)
- From:
Chinese Journal of Orthopaedic Trauma
2004;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the initial stability of a carbon fiber reinforced polyetheretherketone composite (CF/PEEK) stem in human femurs after total hip replacement. Methods 8 pairs of human cadaveric femurs were used to test the CF/PEEK prosthesis versus a conventional cementless stem of cobalt-chrome molybdemum alloy(CoCrMo). The bone-femoral prosthesis interface motion was measured in vitro using displacement transducers. Combined axial and torsional loads and simulated single-leg stance loading were applied. Subsidence, rotation and interface motion were measured with load cycles up to 1 000 N. Results The extent of the micro-motion in the proximal femoral region was larger than that in the distal femoral region. The CF/PEEK composite prosthesis showed less dynamic micro-motion in the proximal region compared with the CoCrMo alloy prosthesis stem, with the average difference being 42%. The extent of the distal micro-motion in the 2 groups was small but the difference was significant (P
