Comparison of the mechanical performance of trochanteric fixation devices.
Clin Orthop Relat Res
; (329): 317-25, 1996 Aug.
Article
in En
| MEDLINE
| ID: mdl-8769467
ABSTRACT
The transtrochanteric surgical approach to the hip is commonly used, especially for revision hip surgery. Failure of the trochanter to heal can lead to hardware failure, persistent pain, and limp. Rigid internal fixation is needed in this approach to achieve an adequate rate of healing. Newer cable and cable grip systems have been designed to improve trochanteric fixation, but have not been compared to the older Charnley wire fixation techniques. In this study, an in vitro mechanical method previously used to test wire fixation methods was used to compare wire, cable, and cable grip fixation methods. A quasistatic mechanical distraction device was used to compare structural stiffness, load to clinical failure, energy to clinical failure, and maximum load resisted by the fixation devices. The cable grip system was found to be stiffer, to resist a larger load to mechanical failure at 1-cm displacement, and to absorb a greater amount of energy to clinical failure when compared with the other systems. These data suggest that use of the cable grip fixation method should result in improved clinical success compared with the Charnley wire technique.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Materials Testing
/
Internal Fixators
/
Femur
Limits:
Adolescent
/
Adult
/
Humans
Language:
En
Journal:
Clin Orthop Relat Res
Year:
1996
Document type:
Article
Affiliation country:
United States