Summary
The isometry of the bipartite medial collateral ligament of the tarsus and two methods
of stabilization by prosthetic ligament were assessed by measuring the change in distance
between the origin and the insertion through full range of joint motion of the ligament
and prosthetic ligaments. The single suture technique was isometric when the distal
site was located at the centre of the trochlea of the talus. This site can only be
used when the medial malleolus, which overlies the talus, is missing or removed. Whilst
some length changes occur with hock motion, the double suture technique may be advocated
in instances where the medial malleolus is present.
Keywords
Tarsus - collateral - ligament - isometry
