Determination of subtalar joint axis location by restriction of talocrural joint motion.
Gait Posture
; 25(1): 63-9, 2007 Jan.
Article
em En
| MEDLINE
| ID: mdl-16472526
ABSTRACT
The location of the subtalar joint axis is an important determinant of the mechanical function of the foot. The moments of muscle forces and of the ground reaction force about the subtalar joint are dependent upon the location of this joint axis. There is substantial variation in subtalar axis location across subjects, but current methods for determining its location are often invasive or involve expensive imaging protocols. A novel technique for location of the subtalar axis is presented in which the talocrural joint is passively immobilized so that motion of the tibia relative to the calcaneus can be used to estimate the subtalar axis. This paper presents results of cadaver testing in which accuracy of the technique was assessed by comparing helical axes computed from calcaneus-tibia bone motions to axes computed from calcaneus-talus bone motions. Only small motions at the talocrural joint were observed, and good estimates of the subtalar axis (errors less than 15 degrees and 2mm) were achieved in four of six specimens.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Articulações do Pé
/
Articulação do Tornozelo
Limite:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Gait Posture
Assunto da revista:
ORTOPEDIA
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Estados Unidos