TY - JOUR
T1 - Initial stability of a new hybrid fixation hip stem
T2 - Experimental measurement of implant-bone micromotion under torsional load in comparison with cemented and cementless stems
AU - Baleani, Massimiliano
AU - Cristofolini, Luca
AU - Toni, Aldo
PY - 2000
Y1 - 2000
N2 - A new hybrid fixation stem, named cemented-locked uncemented (CLU), for total hip arthroplasty was developed to achieve good initial stability. Primary stability is guaranteed by the cement which is injected into two pockets in the lateral area. This leaves a large surface available for long- term biologic fixation (direct bone attachment on implant). This study evaluates in vitro the initial stability of the CLU prototype under torsional load, in comparison with cemented and cementless stems. The results show that the CLU stem is very stable in simulated stair climbing. Its micromotions are comparable to those of a cemented prosthesis, and significantly less (80-90% lower) than those for a cementless stem. These findings confirm the optimal initial stability expected from the CLU prototype. This new design, which employs hybrid fixation, should improve bone formation on the implant and reduce the risk of stem loosening. (C) 2000 John Wiley and Sons, Inc.
AB - A new hybrid fixation stem, named cemented-locked uncemented (CLU), for total hip arthroplasty was developed to achieve good initial stability. Primary stability is guaranteed by the cement which is injected into two pockets in the lateral area. This leaves a large surface available for long- term biologic fixation (direct bone attachment on implant). This study evaluates in vitro the initial stability of the CLU prototype under torsional load, in comparison with cemented and cementless stems. The results show that the CLU stem is very stable in simulated stair climbing. Its micromotions are comparable to those of a cemented prosthesis, and significantly less (80-90% lower) than those for a cementless stem. These findings confirm the optimal initial stability expected from the CLU prototype. This new design, which employs hybrid fixation, should improve bone formation on the implant and reduce the risk of stem loosening. (C) 2000 John Wiley and Sons, Inc.
KW - Femoral component fixation
KW - Initial stability
KW - Micromovement
KW - Stem design
KW - Total hip replacement
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U2 - 10.1002/(SICI)1097-4636(20000615)50:4<605::AID-JBM17>3.0.CO;2-P
DO - 10.1002/(SICI)1097-4636(20000615)50:4<605::AID-JBM17>3.0.CO;2-P
M3 - Article
C2 - 10756320
AN - SCOPUS:0033999774
VL - 50
SP - 605
EP - 615
JO - Journal of Biomedical Materials Research - Part A
JF - Journal of Biomedical Materials Research - Part A
SN - 1549-3296
IS - 4
ER -