The Hip: Preservation, Replacement and Revision

Kinematic Changes after Fusion and Total Replacement of the Ankle: Part 3: Talar Movement

Foot Ankle Int. 2003 Dec;24(12):897-900

 

Valderrabano V, Hintermann B, Nigg BM, Stefanyshyn D, Stergiou P

 

ABSTRACT

 

BACKGROUND: The purpose of this study was to determine talar movement (e.g., talar rotation and talar shift during (dorsiflexion/plantarflexion) with respect to the tibia in the normal ankle, in the fused ankle, and in the replaced ankle by currently used
prosthetic designs. 

METHODS: A 6-df device with an axial load of 200 N and a four-camera high-speed video system were used for the measurement of the range of motion in six fresh-frozen cadaveri leg specimens. While moving the foot through the whole range of motion for plantarflexion/dorsiflexion, segmental motion of the marked bones of the foot and shank were measured dynamically. Rotation and
medial-lateral shift of the talus were then calculated with regard to flexion position of the foot. 

RESULTS: In the normal ankle, plantarflexion movement was coupled with talar inversion of 3.5°, and dorsiflexion movement with talar eversion of 1.0°, in totally accounting for 4.5° of talar rotation.


Copyright © 2003 (Foot Ankle Int. Dec;24(12):897-900) by the American Orthopaedic Foot and Ankle Society, Inc., originally published in Foot & Ankle International, and reproduced here with permission.




Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Friday, April 27, 2012 4:02 pm