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Adjustable Transarticular Frame Using Standard SK ESF Components 

by IMEX Veterinary

Bald Eagle with a Type 1b hybrid ESF frame with postoperative sponges

Adjustable Transarticular ESF Frame

A popular technique for spanning joints with all sizes of SK ESF frames is the utilization of modified single SK clamps to form an adjustable articulation that is quite secure. The SK ESF single clamp body is comprised of two different parts: a B-1 body part that is placed on the side closest to the pin-gripping portion of the primary bolt with a threaded hole for the secondary bolt, and a B-2 body part that is placed on the opposite side with a smooth hole for the secondary bolt. Modified clamps for transarticular articulations are built with two B-2 body parts, two primary (pin-gripping) bolts, and two nuts. The articulation is built with two of these modified clamps and two short pieces of appropriate size IM pin stock or KE rod. The angle of this articulation is adjustable and can be used to the surgeon’s advantage when a transarticular fixator is employed in the management of Achilles tendon repairs.

Before & After Clamp Modification
Hand chuck insertion of an IM pin into a bone model

FIGURE 1 | Complete Single SK ESF clamp assembly

Cutting of an inserted IM pin with bolt cutters

FIGURE 2 | Modified clamp with two B2 body halves and two primary pin-gripping bolts